Improve Initial Coulombic Efficiency in Lithium Manganese Rich EV Batteries

Cathode active material for lithium-ion batteries that improves voltage stability and capacity retention at high operating voltages. The material, represented by the chemical formula Li1.13Mn0.5651Ni0.3043Mo0.0022O2(0.3Li2MnO3·0.7Li(Ni0.5000Mn0.4998Mo0.0036)O2), has a composition of lithium-excess manganese oxide with specific molar ratios of manganese to nickel and metal content. The material achieves improved performance and stability at high voltage operation by preventing irreversible capacity loss and voltage fading through controlled structural transformations during charge/discharge cycles.

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Manganese oxide cathode materials for lithium-ion batteries that enhance energy density and cycle life. The materials comprise manganese oxides with varying compositions, including lithium-containing and sodium-containing forms, and are produced through controlled synthesis processes. These materials exhibit improved charge-discharge characteristics, reduced thermal stability issues, and enhanced safety compared to conventional cathode materials. The compositions can be formulated with conductive agents and binders to optimize performance in lithium-ion batteries.

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Cathode composition for lithium-ion batteries comprising a single phase rock salt crystal structure, achieved through a ball milling process. The composition is prepared by milling lithium, manganese, and magnesium oxides at room temperature with multiple milling balls, resulting in a disordered rock salt crystal structure without the presence of layered precursors. This composition provides improved cycling stability compared to conventional lithium-rich rock salt cathodes through its single phase crystal structure.

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A cathode composition for lithium-ion batteries that can be produced through a ball milling process. The composition is made from a mixture of lithium, manganese, and aluminum oxides, with specific ratios of these elements. The composition is prepared by ball milling the starting materials at room temperature or at low temperatures, resulting in a disordered rock salt cathode structure. This milling process preserves the metal cations' oxidation states during the process, enabling the production of a cathode material with desired properties.

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Lithium-ion battery cathode material with a transition metal inter-superlattice structure that achieves superior electrochemical performance through a novel preparation method. The material, LiNixMlxo2, features a layered oxide structure with a transition metal inter-superlattice arrangement. The preparation process involves a controlled co-precipitation method that enables precise control over the stoichiometric ratio of transition metal elements while maintaining structural integrity. The material exhibits enhanced electrochemical performance compared to traditional nickel-based materials, including improved cycle stability and specific capacity retention.

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Manganese oxide electrode for lithium secondary batteries with enhanced capacity and stability. The electrode comprises a manganese oxide material that combines single-phase and mixed-phase manganese oxides, with a specific ratio of the two phases. The mixed-phase material has a controlled composition of 1:0.3 to 3.0 first-phase and 0.3 to 3.0 second-phase manganese oxides. The material is produced through a controlled solution preparation process, including the formation of a mixed solution by mixing potassium permanganate and sucrose, followed by the application of pulsed power to the solution using a tungsten electrode. The resulting material exhibits superior electrochemical performance, including enhanced capacity retention and stability compared to conventional manganese oxide electrodes.

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Layered lithium-rich manganese-based high-entropy positive electrode material for lithium-ion batteries, enabling higher energy density and improved cycle stability compared to conventional cathode materials. The material combines manganese with specific dopants to enhance its performance while addressing common issues like oxygen evolution and degradation. The material's unique structure, comprising a layered composition with a manganese-rich core, incorporates a zirconium-based coating and a lithium-rich interlayer to create a stable and efficient cathode. The material's performance is demonstrated through high-temperature testing, showing superior capacity retention and voltage stability compared to conventional materials.

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Lithium-rich manganese oxide cathode compositions with a rock salt structure for lithium-ion batteries. The compositions achieve improved charge-discharge characteristics and stability through a unique rock salt structure that enables both lithium and manganese ions to occupy alternating layers within the material. The compositions exhibit enhanced capacity retention and voltage profile stability compared to conventional compositions.

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A lithium-rich cathode material for lithium-ion batteries with enhanced stability and performance, comprising disordered transition metal cations in a layered structure. The material combines high lithium content with disordered cation arrangements in the layer, enabling improved charge compensation stability and enhanced rate capability compared to conventional layered cathodes. The disordered cations maintain structural integrity during charge and discharge cycles, while the layer spacing is increased beyond conventional lithium-ion battery configurations, enabling better intercalation and retention of transition metal ions.

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Ester-based organic reagent modified lithium-rich oxide positive electrode material for lithium-ion batteries, enabling improved performance characteristics such as enhanced capacity retention, stability, and cycle life. The material is prepared through a controlled oxidation process in an oxygen-free environment, where a uniform organic coating layer is formed on the surface of the lithium-rich oxide while protecting it from atmospheric reactions. This approach enables the creation of a stable and high-capacity lithium-rich oxide cathode with improved first-time Coulombic efficiency and rapid capacity and voltage stability.

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A lithium-rich manganese-based oxide cathode material with enhanced cycle stability for lithium-ion batteries. The material is prepared through a novel surface modification process that incorporates an organic solvent to induce the formation of oxygen vacancies in the manganese oxide lattice. This oxygen-rich vacancy structure creates a three-dimensional lithium ion pathway network, significantly improving ion diffusion and charge storage capacity. The modified material maintains its high theoretical specific capacity and wide working voltage window while demonstrating improved durability and cycle life compared to conventional manganese-based oxides.

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Lithium-rich layered oxide composite cathode material with improved first cycle performance and stability. The material is prepared through a novel approach that incorporates fluorine-doped lithium-rich layered oxide from the inside to the outside, creating a structured material with enhanced oxygen vacancies. This composition enables the formation of a spinel structure that significantly improves the material's first cycle efficiency and stability compared to conventional materials. The material is suitable for lithium-ion batteries and power batteries.

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Battery with enhanced lithium extraction and stability through a novel positive electrode material. The material, LiMeyOαFβ, exhibits improved performance characteristics compared to conventional materials like LiMnO2F, particularly in lithium extraction and capacity retention. The material's crystal structure, with specific composition requirements (x=1.7, y=1.3, α=2.5, β=0.5), enables enhanced lithium extraction while maintaining structural integrity during lithium extraction. The material's performance is further enhanced by the presence of additives, specifically dinitrile compounds and diisocyanate compounds, which facilitate efficient lithium extraction and structural stability.

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A cathode for lithium-ion batteries that improves charging and discharging performance by optimizing electrode material composition. The cathode comprises a collector material, a first electrode layer featuring lithium manganese iron phosphate (LMFP) material, and a second electrode layer comprising lithium nickel cobalt oxide (NCO) material. The second electrode layer is strategically positioned between the collector material and the LMFP layer to enhance current density while maintaining structural integrity. This configuration effectively balances the electrical properties of the LMFP layer with the NCO layer, thereby enhancing overall battery performance.

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Surface-modified lithium-rich layered transition metal oxide for lithium-ion batteries, comprising a composite material comprising a lithium-rich layered transition metal oxide and a nitrogen-doped carbon nano-layer. The nitrogen-doped carbon nano-layer is formed through cracking of a carbon-nitrogen source under high temperature and high pressure conditions. The nitrogen-doped carbon nano-layer intercalates between the lithium-rich layered transition metal oxide and the lithium-rich layer rich in oxygen vacancies, creating a synergistic interface that enhances ion transport and oxygen storage.

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Lithium-ion battery cathode material that achieves high specific energy density through the strategic replacement of manganese with transition metals, specifically through the preparation of Li2Mn1-xMyO2X/C. The material combines divalent manganese with halogen elements, enabling improved redox stability and reversible capacity, while maintaining high voltage performance. The preparation method involves precise control of manganese substitution ratios and halogen incorporation. This approach enables the production of cathode materials with superior reversible capacity and cycle performance, critical for electric vehicle applications.

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A method for preparing high-voltage lithium-rich manganese-based cathode materials for lithium-ion power batteries. The method involves creating electrode sheets with improved stability through a combination of doping and processing techniques. Specifically, the method involves doping the cathode material with elements that enhance its electrochemical performance while maintaining its high-voltage stability. The doping process can be achieved through various methods, including doping of the manganese component or incorporation of other elements that complement the manganese lattice structure. The electrode sheets are then processed to ensure uniform doping distribution and optimal electrode architecture.

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Single-crystal lithium-rich layered oxide cathode material for lithium-ion batteries with enhanced performance and stability. The material, prepared through a novel hydroxide co-precipitation method, achieves controlled morphology through precise control of precursor composition, sintering parameters, and reaction conditions. This approach enables the production of uniform, single-crystal structures with improved electrical conductivity, charge storage capacity, and mechanical strength compared to conventional layered oxide cathodes.

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A positive electrode active material for lithium-ion batteries that enhances capacity while maintaining structural integrity. The material comprises a compound with a specific crystal structure belonging to the space group Fm-3m, where the composition is represented by the formula (1). The compound exhibits enhanced capacity due to its unique crystal structure, which prevents the formation of anions and maintains Li diffusion pathways during both charging and discharging. This results in improved performance and stability compared to conventional materials.

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Lithium metal oxide with enhanced electrochemical performance through the incorporation of charge-compensating redox-active species. The oxide exhibits a cation-disordered rocksalt structure with LiMO2 and LiM′eO2 components, where LiM′eO2 provides a higher redox capacity than LiMO2 alone. The charge-compensating species, with a first oxidation state n and a second oxidation state y greater than n, maintains the redox-active species at a lower oxidation state during charge and discharge cycles, thereby significantly enhancing the material's capacity.

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Synchronizing surface structure and chemical composition of layered lithium-rich cathode materials through a single treatment step. The method involves treating the layered cathode material with a specific combination of chemical reagents, such as ammonium bicarbonate, ammonium chloride, and ethylenediamine, to achieve uniform surface modifications while maintaining the layered structure. This approach enables simultaneous control of surface properties, including surface structure and chemical composition, to achieve enhanced electrochemical performance characteristics.

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A method for preparing a spinel-coated layered cathode material for lithium-ion batteries that enables uniform surface spinel coating of lithium-rich layered cathodes. The method involves preparing a layered cathode material with a common layered ternary structure and lithium-rich layer, followed by a controlled spinel coating process using a specific solvent. The spinel layer is formed through a precise precipitation process that ensures continuous and uniform coverage of the cathode surface. This approach addresses the surface protection challenges associated with traditional spinel coating methods by providing a uniform, continuous spinel layer that maintains electrochemical stability and improves safety during battery operation.

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A battery electrode material with enhanced energy density and capacity, comprising a compound with a specific crystal structure. The material has a space group of FM-3M and a composition formula of (Li1-xMx)2Si2P2S8, where x is between 0.5 and 1. The material exhibits improved ion conductivity and Li insertion efficiency compared to conventional materials, particularly at high charge/discharge rates. The material's unique crystal structure enables efficient Li percolation and ion diffusion, leading to enhanced energy density and capacity.

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A method for preparing high-performance lithium-rich manganese-based cathode materials with core-shell structures for lithium-ion batteries. The method involves creating a core-shell structure through a combination of manganese oxide and lithium cobalt oxide precursors, where the manganese oxide core is formed through a sol-gel process and the lithium cobalt oxide shell is deposited on the core. The core-shell structure enables enhanced electrochemical performance by combining the advantages of both manganese oxide and lithium cobalt oxide components.

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Lithium-rich layered oxide material with a gradient phase structure that enables high-capacity lithium-ion battery cathodes. The material comprises layered oxide phases with a gradual phase composition gradient, where the ratio of nickel, cobalt, and manganese components varies continuously from solution A to solution B. This gradient phase structure enables improved electrochemical stability and capacity retention across the voltage range, while maintaining high specific discharge capacities. The material can be prepared through controlled solution mixing and precipitation processes, allowing precise control over the phase composition gradient.

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Nonaqueous electrolyte battery with improved voltage compatibility and output characteristics. The battery incorporates a positive electrode with a manganese composite oxide active material, where the manganese content is within a specific range (0.22 to 0.7). The positive electrode layer has a comparable capacity to the negative electrode layer, enabling efficient charge and discharge cycles. The battery system integrates the nonaqueous electrolyte with lead-acid storage batteries, achieving voltage compatibility and enhanced performance through optimized electrode design.

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Battery cathode material with enhanced stability and capacity through controlled transition metal doping. The material contains Li2MnO3, which is doped with a fluoride-based transition metal dopant. The dopant enables controlled transition metal oxidation states, significantly reducing defects and improving charge compensation mechanisms. This doping approach stabilizes the cathode structure while maintaining optimal capacity and voltage performance. The material's doping enables precise control over transition metal oxidation states, enabling the development of stable cathode architectures for lithium-ion batteries.

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A method for preparing lithium-rich manganese-based cathode materials for lithium-ion batteries that addresses the challenges of conventional wet mixing and drying processes. The method involves a single-step precursor preparation process that combines crushing and mixing of lithium-rich manganese precursor with lithium salt in ethanol, followed by rotary evaporation and subsequent drying. The resulting dried sample is then processed through a controlled atmosphere smoldering process to produce a lithium-rich manganese-based cathode material with improved properties.

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A surface-modified lithium-rich spinel cathode material that enhances electrochemical performance through controlled surface modification. The material undergoes in-situ surface coating using a spinel-type lithium manganese oxide (LiMnOx) precursor, enabling precise control over the reaction rate and surface properties. This approach enables uniform cladding structures without requiring precise reaction conditions, while maintaining the spinel structure. The surface-modified material exhibits improved electrochemical performance compared to conventional methods, particularly in high-power applications.

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A high-performance cathode material for lithium-ion batteries that addresses capacity limitations through a novel layered oxide structure. The material combines a layered oxide with a specific composition of Mn, Ni, and Co, where the Mn content is between 0.175 and 0.275, Ni content is between 0.0 and 0.25, and Co content is between 0.0 and 0.05. The layered structure enables efficient ion insertion and expulsion, while the controlled Mn and Co composition maintains crystal quality and stability. This material achieves higher specific capacities compared to conventional cathode materials, particularly in the 300mAh/g range, and provides improved charge/discharge characteristics.

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A lithium-rich cathode material for lithium-ion batteries that achieves higher capacity and stability through a novel core-shell structure. The material consists of a lithium-rich solid solution core with a surface-coated lithium ion-conductive layer. The surface layer is formed through a precipitation method that incorporates specific metal cations and ratios of metal ions, enabling efficient lithium ion conductivity. This core-shell architecture enables enhanced interfacial contact between the solid solution and the surface layer, leading to improved charge and discharge characteristics.

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A ternary cathode material for lithium-ion batteries that addresses the issues of inconsistent grain orientation and particle morphology during charge-discharge cycles. The material combines a uniform crystal structure with controlled grain size and morphology, achieved through precise pH control during synthesis. This enables stable, spherical secondary particles that maintain uniform grain orientation during cycling, preventing cracking and particle agglomeration. The material's uniform structure also supports efficient lithium insertion/extraction, enhancing overall battery performance and safety.

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Lithium-ion battery anode with enhanced capacity and cycle life through a novel core-shell structure. The anode material comprises a lithium manganese oxide (LMO) base with a nickel-rich shell, where the shell is formed through a controlled thermal treatment process. The nickel-rich shell enhances the anode's electrochemical properties by creating a high-temperature stable interface between the LMO and the current collector, while maintaining the anode's structural integrity. This design enables improved energy density and cycle life compared to conventional anode materials.

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Positive electrode active material for lithium-ion batteries that enhances discharge capacity beyond conventional levels. The material, comprising a specific composition of lithium metal oxides, achieves improved lithium ion diffusion and storage capacity through enhanced lattice structure and ion mobility. This material enables higher discharge rates compared to conventional lithium metal oxides while maintaining structural integrity. The composition is optimized for use in lithium-ion batteries, particularly in systems with high discharge rates, to maximize energy density.

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A modified spinel lithium-ion battery positive electrode material that enables high-voltage operation while maintaining excellent performance characteristics. The material combines a spherical shell structure with a core of spinel phase material, where the shell is made from a layered composite of lithium, nickel, and manganese. This architecture provides enhanced thermal stability, improved cyclic stability, and enhanced working voltage range compared to conventional spinel materials. The shell structure protects the spinel phase from thermal degradation while maintaining its electrochemical properties, while the layered composite structure enhances mechanical strength and conductivity. The resulting material exhibits high specific capacitance, wide discharge voltage range, and excellent performance characteristics for high-voltage applications.

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