Lithium Iron Phosphate Cathode Development for EV Battery

Battery cell design with two separate positive electrode plates to improve energy density and cycle life compared to mixing ternary and phosphate cathode materials. The cell has a positive electrode plate with a ternary material like LiNiCoMnO2 and a separate positive electrode plate with a lithium phosphate like LiFePO4. This avoids issues like gelation, filter blockage, and particle dispersion that can occur when mixing ternary and phosphate cathodes. The separated cathodes are stacked with the negative electrode plate to form the battery cell.

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Battery cells with reduced cost, improved stability, safety, and cycling performance compared to conventional lithium-ion cells. The cells use cathode electrodes with a cathode active material containing LiMnxFe1-x-yMyPO4 (where x, y < 1, M = dopant) instead of nickel-rich cathodes. The anode has graphite with lithium silicon oxide (LSO) or silicon-carbon (Si-C) instead of just graphite. This provides lower cost, thermal stability, and safety versus nickel-rich cathodes and graphite-only anodes.

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A method to prepare lithium iron phosphate (LFP) cathode material for lithium-ion batteries with improved microstructure and battery performance. The method involves adding a specific ammonium salt dispersant during mixing of the precursor slurry. The dispersant forms a negatively charged ion group that adsorbs onto the iron phosphate particles. This reduces agglomeration and improves reaction during sintering to produce LFP with better morphology and stability. The ammonium salt decomposes during sintering to reduce byproducts.

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Lithium secondary battery with improved capacity, lifespan, and resistance by optimizing the electrolyte composition for high loading lithium iron phosphate (LFP) cathodes. The electrolyte contains ethylene carbonate (EC) and dimethyl carbonate (DMC) solvents with DMC content between 5-75 vol%. Adding vinylene carbonate (VC) with a weight ratio to DMC of 0-0.2 improves negative electrode stability. This electrolyte allows high LFP loading (450-740 mg/cm2) with good impregnation while reducing resistance and degradation.

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Lithium iron phosphate battery with improved power and cycle life by using a combination of large and small particle size cathode and anode active materials. The battery has distinct median particle sizes for the first and second cathode and anode materials. This mixture of large and small particle sizes improves rate performance while avoiding excessive side reactions and polarization issues that arise from using only small or large particles.

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Cathode material for lithium-ion batteries with improved lifespan and energy density by coating a lithium-rich oxide core with an olivine structure shell. The core contains a lithium-rich oxide like Li2Mn0.33Ni0.33Co0.11O2, while the shell is made of an olivine-structure oxide like LiFePO4. The core-shell structure improves battery life by reducing gas generation during cycling compared to using just the lithium-rich oxide core. The core-shell structure also improves energy density compared to using just the olivine shell.

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Battery balancing method for lithium iron phosphate (LFP) batteries that have a voltage plateau in their charging characteristic curve. The method involves initiating balancing at specific conditions during charging, like when the voltage reaches a threshold or when the SOC reaches a threshold. This allows balancing beyond the narrow flat section of the LFP charging curve.

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Lithium-ion battery positive electrode material with improved performance at low temperatures and during fast charging. The material is lithium iron phosphate coated with a carbon layer having an ID/IG Raman intensity ratio of 0.75-1.2. The carbon coating enhances desolvation of lithium ions at the electrode/electrolyte interface, increasing electrical conductivity and rate performance. The ID/IG ratio range promotes the desired carbon structure for electrolyte infiltration and lithium migration.

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Slurry for preparing positive electrode films for lithium-ion batteries with improved dispersion of lithium iron phosphate cathode material. The slurry contains a copolymer dispersant with specific nitrile group and conjugated diene structural units. The copolymer has a mass ratio of residual double bonds calculated by a formula between 0.05-10 mass %. The copolymer dispersant provides better dispersion of lithium iron phosphate particles without aggregation compared to conventional dispersants. This enables uniform coating of the cathode material in batteries for improved performance and cycle life.

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Battery monitoring system for accurately estimating state of charge (SOC) of a battery pack with flat OCV curve cells like LFP, using a virtual cell model and physical cell model. The virtual cell model has a more pronounced OCV curve, like NCM, to provide a definitive output of cell voltage and SOC. The physical cell model has parameters specific to the actual pack cells. By combining the definitive and indefinite outputs, a more accurate SOC estimate is generated for the pack with flat OCV cells.

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Lithium secondary battery with improved low-temperature performance by improving electrode impregnation. The battery uses a specific loading range of 450-740 mg/25 cm2 for the positive electrode with lithium iron phosphate particles. The electrolyte contains additives like compounds represented by Formulas 1-3 in a 0.1-3% range. This improves capacity expression, lifetime, and resistance at low temperatures.

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Charging method for batteries in electric vehicles that improves accuracy of state of charge (SOC) and state of health (SOH) estimation for lithium iron phosphate (LFP) batteries without disrupting normal driving patterns. The method involves calculating the exact SOC during charging by leveraging vehicle-to-grid (V2G) functionality. When the vehicle is plugged into a charging station, it first discharges to 24% SOC to accurately determine the SOC. It then charges back to full. This allows precise SOC determination without relying solely on open circuit voltage (OCV) in the flat voltage range of LFP batteries.

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Composite lithium iron phosphate (LFP) material for high-energy lithium-ion batteries with improved density and capacity. The composite LFP is prepared by coating iron phosphate and lithium sources with a mixture of carbon sources, including synthetic polymer carbon, biomass carbon (carbonized plant fibers), and carbohydrate carbon. The composite LFP has higher compaction density due to the encapsulating carbon coating. This improves the specific capacity compared to uncoated LFP. The carbon fiber coating provides better compaction while the synthetic and carbohydrate carbon sources enhance encapsulation.

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Recycling lithium battery metals using a wet processing method to extract valuable metals from cathode materials like lithium iron phosphate and ternary compounds without pre-separating the battery types. The process involves pyrolysis to convert the batteries to gases and solids, followed by gas cleaning and solid separation. The solids are treated with water to extract metal ions. This allows efficient separation and recovery of metals like lithium, nickel, manganese, and cobalt from the battery waste.

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Abstract In this study, a multiscale heterogeneous electrochemicalthermomechanical coupling model (MHETM) is proposed. A twodimensional gradient porosity electrode (U1, G2, and G3) 3D macroscopic cell are combined to realize coupled multiphysics field simulation of lithium iron phosphate (LFP) battery from microscopic particles cells. The MHETM has higher accuracy can more accurately describe the ion transport process inside active particles. results show that design optimizes diffusion path improves rate endofdischarge concentration. Meanwhile, maximum stress displacement G3 significantly lower than those U1 model, respectively. addition, thermalmechanical analysis revealed negative correlation between thermal expansion. introduction macrothermal further facilitates transport, resulting in an increase concentration maxima both models, with significant model. provides effective tool for indepth understanding complex multiphysical mechanism lithiumion batteries.

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With the popularity of electric vehicles, number used lithium iron phosphate (LiFePO 4 , LFP) batteries has increased significantly, and failure to properly dispose these endoflife power will cause serious harm environment. In this study, an environmentally friendly efficient solidphase method is proposed regenerate spent LFP cathode materials. method, crystal structure materials restored by supplementing using a source, Fe 3 + impurities in are reduced glucose, regenerated carbon coated. addition, Al introduced dope further enhance its repair effect. The test results show that doped material low electrochemical impedance, dischargespecific capacity reaches 148.59 mAh g 1 at 0.05 C multiplication rate, which about 93.38% new (NLFP). retention rate 89.02% after 500 cycles 1 rate. These data indicate doped exhibits excellent recovery cycling stability. This study provides route for recycling waste

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Battery pack with improved low temperature performance by optimizing cell placement and electrode chemistry. The pack has three regions based on temperature simulations at low temperatures. Cells are arranged with the lowest temperature cell closest to the pack walls. The lowermost cell contains a lithium iron phosphate positive electrode with a low-temperature additive containing multiple carbonyl groups. This allows better discharge capacity at low temperatures compared to regular lithium iron phosphate. The adjacent cells also have the additive, but in lower amounts. This balances capacity loss between cells at low temps.

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The rapid growth of lithium iron phosphate (LiFePO4, LFP)-based lithium-ion batteries in energy storage raises urgent challenges for resource recovery and environmental protection. In this study, we propose a novel method selective extraction the resynthesis cathodes from spent LFP batteries, aiming to achieve an economically feasible efficient recycling process. process, leaching H2SO4-H2O2 system is employed rapidly selectively extract lithium, achieving efficiency 98.72% within just 10 min. Through exploration precipitation conditions lithium-containing solution, high-purity Li2CO3 successfully obtained. recovered FePO4 are then used resynthesize cathode materials through carbon-thermal reduction method. A preliminary economic analysis reveals that disposal cost approximately USD 2.63 per kilogram, while value regenerated reaches 4.46, highlighting advantages Furthermore, with acid-to-lithium molar ratio only 0.57-just slightly above stoichiometric 0.5-the process requires minimal acid usage, offering clear benefits. Overall, work presents green, efficient, viable strategy showcas... Read More

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ABSTRACT The rapid emergence of lithiumion batteries (LIBs) to satisfy our ever increasing energy demands will result in a significant future waste problem at their end life. Lithium iron phosphate (LFP) as cathode material is now widely used LIBs with market share. It expected that there be volumes battery containing this the near future, and therefore it important develop methods for effectively repurposing LFP mitigate its impact on environment. In work we demonstrate from spent electrocatalysts oxygen evolution reaction (OER) which critical electrochemical water splitting production green hydrogen. Our study has shown recovered once immobilized onto Ni substrate reconstructs into mixed Fe/Ni oxide surface layer highly active OER. Promisingly, were cycled multiple times (up 100 cycles) showed excellent electrocatalytic performance low Tafel slope 58 mV dec 1 , overpotential values 250 310 reach 10 mA cm 2 respectively 24 h stability over 200 . This research provides potential motivation recycling companies isolate Li ion later use electrolysis technologies.

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This study presents a transformative approach to passive thermal management in lithium iron phosphate (LiFePO4) battery packs through geometrically optimized aluminum cooling structures. We investigate four distinct configurations - baseline (uncooled), unilateral side plate, inter-cell plates, and molded enclosure using experimentally validated COMSOL Multiphysics simulations under extreme 20C discharge conditions (50 A per cell). The most advanced design, featuring an mold surrounding 90% of each cell's height, achieves unprecedented 11 C reduction peak temperature (from 66 55 C) compared conventional uncooled packs, while maintaining 99.1% original power output (1107 W vs. 1118 W). performance surpasses existing methods rivals many active systems, accomplished three key innovations: 1. patented snap-fit geometry that enhances heat transfer simplifying assembly, 2. strategic material distribution reduces gradients by 32% baseline, 3. cost-effective solution adding less than $1 pack expenses. Furthermore, when combined with paraffin phase change material, the system demonstrates... Read More

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A method for charging and discharging lithium iron phosphate (LFP) batteries in segmented charge/discharge cycles to keep the charge/discharge intervals constant. During charging, the charging ends when the battery voltage reaches a predetermined end-of-charge voltage. During discharging, the discharging ends when the discharged capacity equals the previous charge capacity multiplied by the battery's Coulombic efficiency. This prevents early discharge termination due to voltage plateaus in LFP batteries.

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Lithium ion battery positive electrode composition and electrode design to enable accurate state of charge estimation and improved safety. The electrode contains a specific ratio of lithium iron phosphate, lithium iron manganese phosphate, and layered oxide-based active material particles. This mixture provides a discharge curve with a central non-plateau region between the two plateau regions. This central region allows accurate state of charge estimation compared to batteries with only plateau regions. The mixture ratio is 0.10≤x≤0.60, 0.10≤y≤0.70, 0.10≤z≤0.40, and x+y+z=1.

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Preparation method for iron phosphate precursor for lithium iron phosphate (LFP) batteries that improves product quality, reduces raw material waste, and simplifies manufacturing compared to conventional methods. The key steps are: 1) Using iron powder with specific density and particle size distribution. The powder has a lower density (2.3-2.6 g/cm3) and smaller second particle size range (10-30% of total weight) compared to conventional iron powders. 2) Titrated addition of phosphoric acid to iron powder dispersed in water, with controlled reaction temperatures, to prevent rapid heating and reaction rate issues. 3) Heat treating the precursor in air or oxygen. The titrated addition and controlled reaction temperatures prevent excess hydrogen generation, rapid heating, and reaction rate issues. The specific iron powder properties allow slower reaction rates and better control. This reduces waste, improves

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All-solid-state lithium-ion battery with improved safety and performance by using a sulfide solid electrolyte in the positive electrode, negative electrode, and separator. The battery has a positive electrode with a safety functional layer of olivine-type lithium iron phosphate between the current collector and active material. The active material itself contains a sulfide solid electrolyte along with the regular electrode material. The separator also uses the sulfide solid electrolyte. This eliminates the need for a flammable liquid electrolyte, reducing safety issues like explosion and fire. The sulfide solid electrolyte provides improved ionic conductivity compared to traditional solid electrolytes like oxides.

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<title>Abstract</title> In this study, spent lithium iron phosphate (LFP) LIBs from electric vehicles were recycled through hydrometallurgical and pyrometallurgical routes. The cathode material was characterized by X-ray diffraction (XRD), Raman spectroscopy, energy-dispersive scanning electron microscopy (SEM), inductively coupled plasma optical emission spectrometry. LiFePO₄, Fe₂O₃, FePO₄ identified as the predominant phases, Fe(OH)₃ Fe₂(PO₄)O secondary phases. Alkaline leaching found to be effective in recovering preserving structural components, such LiFePO₄. residue then used for synthesis of a novel material. Structural morphological characterization XRD, SEM revealed disordered crystalline phase -LiFe₅O₈/-Li₂FeO₃/-Fe₂O₃ with agglomerated grains irregular particle sizes. exhibited pseudocapacitor behavior, specific capacitance 3.0 F g¹ 82% retention over 250 charge/discharge cycles at current density 0.7 A ... Read More

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A low-cost, efficient method to recycle lithium iron phosphate (LFP) batteries and produce high-purity LFP precursor material for reuse in new batteries. The recycling process involves steps like acid leaching, copper electrolysis, iron oxidation, iron phosphate precipitation, and lithium carbonate precipitation. It separates and removes impurities like copper and aluminum from the LFP precursor, reducing impurity content compared to other methods.

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High-rate lithium iron phosphate (LFP) cathode material for lithium-ion batteries with improved fast charging performance. The LFP cathode material is prepared by a two-stage calcination process to nanize the particles and inhibit agglomeration, while coating them with graphene and carbon. This enhances ion and electronic conductivity for better rate performance. Nitrogen doping of the carbon further improves conductivity. The two-stage calcination prevents carbon film blow-off during high-temperature treatment. The LFP-graphene-carbon composite has high capacity at low rates and maintains good cycling stability.

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Abstract The definite lifespan of lithium iron phosphate (LiFePO 4 , LFP) batteries necessitates the advancement costeffective, naturefriendly, and productive recycling techniques for spent LFP batteries. In this study, ethylene glycol (C 2 H 6 O ), a sustainable economical small organic molecule, is employed as multifunctional hydrogenbonding donor, along with chloride (LiCl), readily accessible Li source acceptor. Together, they form novel Lisalt deep eutectic solvent (DES) through hydrogen bonding interactions. This DES directly repairs rejuvenates cathode material (SLFP) at 80 C. not only replenishes depleted in SLFP reduces adverse effects LiFe antisite defects but also establishes reducing environment that facilitates reversion degraded Fe(III) species back to their original Fe(II) state. Consequently, regenerated exhibits remarkable electrochemical behavior, delivering an initial capacity 155.6 mAh g 1 0.1 C retaining 93% its after 300 cycles 1 C. approach can be scaled up treat large quantities recovered from fully retired batteries, presenting pract... Read More

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Abstract: The rapid proliferation of electric vehicles (EVs) has significantly contributed to reducing greenhouse gas emissions and advancing sustainable transportation systems. Central the functionality these EVs are lithium-ion batteries (LiFePO4), known for their high energy density long lifespan. However, as EV market continues expand, growing issue battery waste management presents considerable environmental economic challenges. This paper provides a comprehensive overview three main types utilized in vehicles, namely, Lithium Iron Phosphate (LFP), Nickel Manganese Cobalt (NMC) aluminum (NCA) batteries. It examines challenges opportunities recycling disposal within broader context ongoing crisis. As demand clean technologies intensifies, becomes crucial ensure long-term viability renewable systems addressing resource scarcity. review explores complexities involved disposal. discusses four prominent methods that available practice 2024. advantages disadvantages each carefully evaluated discussed thoroughly paper. findings underscore urgent need collaborative efforts among policym... Read More

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Lithium-ion battery design to improve cycling performance by forming a stable anode SEI layer when using cathode materials like lithium iron phosphate or lithium manganese oxide that have poor SEI formation. The battery contains a SEI layer-forming additive like elemental sulfur or metal sulfides in the cathode coating or electrolyte. This additive migrates to the anode during charging and participates in SEI formation, allowing a SEI with both high-valence sulfur species and low-valence sulfur species. This improves charge transfer and cycling capacity compared to just low-valence sulfur SEI.

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Recovering valuable metals like lithium, iron, aluminum, and silicon from waste lithium iron phosphate (LFP) battery positive electrodes using a single-step high-temperature chlorination process. The process involves roasting the electrode material in a chlorine atmosphere at high temperature to form metal chlorides that can be directly distilled and condensed for recovery. This avoids the need for multiple leaching and extraction steps using large amounts of acids and bases. The high-temperature chlorination process allows direct distillation and condensation of the metal chlorides for recovery.

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Abstract The growing number of spent LiFePO 4 (LFP) batteries presents a major challenge. Traditional recycling methods are economically inefficient and environmentally harmful, there is an urgent need for innovative ecofriendly solution. This study constructed novel direct regeneration approach LFP using melamine phytate lithium through onestep solidstate sintering process. Phytate served as essential supplement, whereas acted electron donor nitrogen source. reducing environment created by pyrolysis conducive to eliminating Fe Li defects reconstructing + diffusion channels. Additionally, the Ndoped carbon layer derived from N atoms in can form more active sites that improve electrical conduction properties regenerated (RLFP) material. RLFP exhibited excellent electrochemical performance. Compared with LFP, it significantly higher initial capacity 150 mAh g 1 at 0.2 C. After 300 cycles 1 C, retained 82% its capacity. At 5 cycling stability, retention rate 77% after cycles, comparable commercial products. Overall, costeffective sustainable strategy retired determined... Read More

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Battery cell design for electric vehicles with improved thermal stability and reduced risk of thermal runaway compared to conventional lithium-ion batteries. The design uses lithium metal anodes and LFP cathodes in the cell. The anode active material is lithium metal, and the cathode active material is LiFePO4 (LFP) with a carbon coating. The separators have a substrate made of materials like polyolefin, cellulose, PVDF, or porous polyimide, with a coating layer like ceramic, polymer, alumina, LATP, PVDF, or PMMA. This cell configuration with lithium metal anodes and LFP cathodes on specialized separators provides improved thermal stability and reduced thermal runaway compared to NMC/NCA cells with graphite anodes.

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The rapid advancement of electric vehicles (EVs) and renewable energy storage systems has significantly increased the demand for reliable efficient battery technologies. Lithium iron phosphate (LFP) batteries are particularly suitable these applications due to their superior thermal stability long cycle life. A critical parameter in optimizing performance LFP is open-circuit voltage (OCV), essential accurate state charge (SoC) estimation. determination OCV challenging relaxation effects post-charging/discharging, causing changes up 24 h or even more until stabilization. This paper presents a novel statistical model estimation that employs an online observer detect knee/elbow point curve. By utilizing at initial voltage, accurately computes stabilization point. proposed method, validated with extensive experimental data, achieves high accuracy, computed error less than 0.26% charging under 1.2% discharging.

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A low-cost, high-purity iron production method for lithium-ion battery cathodes like lithium iron phosphate (LFP). The method involves solid-state reduction of iron-containing ores to metallic iron, followed by dissolving the iron in acidic aqueous solution. The dissolved iron can then be used as a precursor for lithium iron phosphate cathode materials. The dissolution step removes impurities and allows separation of the iron. The dissolution conditions are optimized using gases like oxygen and hydrogen peroxide to increase solubility and dissolution rate.

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LiFePO4 (LFP) undergoes a two-phase transformation during lithium insertion or extraction, forming lithium-rich and lithium-poor phases. Determining the kinetic parameters of these phases is crucial for electrochemical models but remains challenging. In this study, we decouple reaction diffusion kinetics Li-rich Li-poor in LFP cathodes using single-particle impedance spectroscopy (EIS). agglomerates comprising primary particles are fabricated into microelectrodes. EIS measurements conducted on single at various ratios. A physics-based model developed phase-transformation electrodes, evolution exchange current density (i0) coefficient (DLi) both extracted. single-phase region, phase exhibits steeper change i0 with varying ratios compared phase. coexistence shows higher than Additionally, DLi that regions. We also compare particle sizes to clarify impact size kinetics. The proposed impedance-based approach decouples cathodes, extracted serve as basis developing considering transformation.

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Preparing a lithium secondary battery cathode with improved energy density by synthesizing a bimodal-sized lithium iron phosphate cathode active material. The method involves mixing lithium, iron, dopant, sodium, and carbon precursors to make a slurry, pulverizing the particles, then heat treating to form a lithium composite phosphorus oxide. The dopant and sodium control particle growth for a bimodal size distribution of small and large particles. This densely packed structure improves cathode energy density compared to nano-sized particles.

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Lithium iron phosphate (LFP) cathode material for lithium-ion batteries with improved rate performance and cycle life. The LFP has a lattice distortion of 0.058-0.08% to reduce lithium ion transfer resistance. The LFP can be prepared by co-doping elements like Na, K, Mg, Ti, V, W, Nb, La, Cr, Mo, Ca, Zn into the Fe and Li sites. The co-doping expands the lattice, increases diffusion coefficients, and suppresses crystal growth. The co-doped LFP has specific surface areas of 7-13 m2/g, median particle sizes of 0.5-2.5 µm, and carbon content of 0-5 wt%. The co-doping and particle size optimizations improve LFP electrochemical properties like

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Coating a low-temperature rate type lithium iron phosphate cathode material with a thin film of yttrium titanium oxide (YTO) to improve low-temperature and rate performance. The coating process involves sol-gel synthesis of a mixed metal hydroxide precursor, followed by high-temperature sintering in air to form a uniform YTO film on the lithium iron phosphate surface. This coating reduces the lithium diffusion barrier and accelerates lithium ion transport, significantly improving low-temperature and rate characteristics compared to uncoated lithium iron phosphate.

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Battery management system to balance input/output characteristics between different types of assembled batteries like LFP and ternary batteries. The balancing is done by temperature regulation when the overall system temperature is below a reference. The regulation involves raising the temperature of LFP batteries more than ternary batteries using techniques like higher charging/discharging power, larger temperature rising ripple current, and heating. Above the reference temperature, charging/discharging power is increased for ternary batteries to match LFP. This balances calorific values and deterioration rates between battery types.

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Lithium iron phosphate (LFP) cathode material for lithium-ion batteries with improved properties like higher capacity, rate performance, and reduced moisture absorption compared to conventional LFP. The improvements come from synthesis methods using precursors like vanadium phosphate and iron phosphate with specific molar ratios, dopant levels, and particle pore structures. The synthesis reduces emissions and eliminates ammonia compared to conventional LFP production. This leads to LFP powders with optimized physical properties like smaller pore sizes and lower moisture absorption, which translate to better battery performance.

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Lithium iron phosphate (LiFePO4) cathode material for lithium-ion batteries with improved ionic conductivity and higher energy density compared to undoped LiFePO4. The cathode material has a granularity of D50 greater than or equal to 1 um. The improved ionic conductivity is achieved by adding secondary phosphate phases (LiMxPyp) near the surface of the core LiFePO4 phase. The secondary phase dopants contain transition metals or main group elements like Mn, Co, Gd, In, V, Zr, etc. The doped LiFePO4 cathode material has higher ionic conductivity and can be prepared using a precipitation process to control particle size. This allows higher loadings and bulk density compared to nanoscale LiFePO4.

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High energy density fast charging lithium iron phosphate battery with improved capacity and cycle life compared to conventional lithium iron phosphate batteries. The battery has a composite lithium iron phosphate positive electrode with lithium supplementary materials, and a negative electrode with fast charging graphite and silicon. The compositions and particle sizes of the positive and negative electrodes are optimized to increase capacity, reduce density, and improve fast charging. This allows the battery to have energy density of 200-220 Wh/kg, similar to ternary batteries, while meeting the needs of passenger vehicle fast charging and cycle life.

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Intelligent lithium battery control system that improves performance, reliability, and safety of lithium battery packs used in electric vehicles, drones, and energy storage systems. The system monitors battery status, optimizes charge/discharge strategies, predicts battery health, manages power peaks, balances energy use, provides remote monitoring, and implements short circuit protection. Algorithmic optimization, temperature management, and data analysis enhance battery performance and longevity.

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A cooling system for a battery management module used in lithium iron phosphate (LiFePO4) batteries to prevent overheating and component failure during long-term operation. The cooling system has a housing with a fan, fins, heat spreading plate, and spring-loaded clips to attach to the battery pack. The fan blows air through the fins to cool the internal electronics, and the heat spreading plate transfers heat from the components to the fins. The spring-loaded clips attach the module to the battery pack to provide mechanical stability and electrical connection. This active cooling system allows the battery management module to operate at higher power levels and longer durations without overheating components.

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Flaky lithium iron phosphate (LFP) with improved properties for batteries, and a method to synthesize it. The flaky LFP has a composition of LiFe0.3Mn0.7P04. The synthesis involves dissolving iron, manganese, and phosphorus sources in a low temperature solution, adding lithium source, adjusting pH, and hydrothermally reacting at low temperature to produce flaky LFP. The key features are using a specific ratio of iron to phosphorus, low temperature synthesis, and adjusting pH. This results in flaky LFP instead of the usual lumpy or spherical shape. The flaky LFP has higher lithium content, lower impurity content, and better cycling performance compared to conventional LFP.

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Control system and method for lithium iron phosphate battery packs used in electric motorcycles that provides improved temperature management, charge/discharge control, and overall battery health for longer life. The system has a compact layout with staggered cell arrangement in the pack to improve space utilization and heat dissipation. The control module monitors pack status, compensates for temperature, and intelligently charges/discharges to optimize battery performance.

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Lithium iron phosphate battery with improved low temperature and high rate performance for applications like vehicle starting. The battery uses a modified electrode composition and assembly method to enhance performance. It involves adding small amounts of silicon and graphite blended with oxide coating to the negative electrode, carbon coating on the positive electrode, and a porous ceramic diaphragm. This composition and assembly improves low temperature and rate performance compared to conventional lithium iron phosphate batteries.

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Preparation method for high conductivity and high density lithium iron phosphate (LiFePO4) cathode material for lithium-ion batteries. The method involves doping the iron phosphate precursor with titanium oxide during synthesis. This doping step improves the LiFePO4's electrical conductivity and compaction density. The doped iron phosphate precursor is then roasted and crushed to form the final LiFePO4 cathode material.

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Lithium iron phosphate (LiFePO4) batteries with integrated temperature control to enable operation in extreme hot and cold environments. The batteries have a battery management system (BMS) that monitors and controls heating and cooling elements inside the battery. These elements include phase change materials (PCMs), heat exchangers, fans, thermal electric devices, and coolers. The BMS activates the appropriate elements to maintain optimal battery temperature within a range of 5-40°C for uninterrupted operation in extreme temperatures. This prevents damage, decreased life, and performance degradation.

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