Lithium Ion Battery Electrolyte Formulation

A non-aqueous electrolyte solution for lithium batteries that balances high-temperature, cycling, and rate performance. The electrolyte contains a lithium salt, organic solvent, and a specific additive composition. The additive has two components, an additive A with structure represented by Formula (1) and an additive B. The additive A improves high-temperature performance by forming a thin, conductive film on the electrode surface. The additive B further enhances cycling and rate performance. The combination of these additives in the electrolyte enables lithium batteries with good cycling, rate, and high-temperature characteristics.

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Ether-based cosolvent electrolyte for lithium metal batteries that provides high energy density without decomposition at high voltage anodes. The electrolyte contains a lithium salt dissolved in a mixture of a fluorinated dialkoxy alkane solvent like FDMB and a dialkoxy alkane solvent like DEE. This cosolvent blend improves ionic conductivity while maintaining oxidation stability compared to using just FDMB. The stability at high voltage anodes is improved due to the lower HOMO energy level of FDMB compared to ether solvents.

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Electrolyte solution for flexible batteries that enables high discharge capacity and cycling stability at extreme temperatures. The electrolyte contains specific organic solvents like propyl propionate and ethyl propionate, a lithium salt at a concentration of 0.6 to 1.6 M, and additives like vinylene carbonate, fluoroethylene carbonate, and ethylene sulfate. This electrolyte composition improves discharge performance even at low and high temperatures when used in flexible batteries.

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Lithium battery electrolyte composition and battery design to suppress thermal runaway and improve safety while maintaining battery performance. The electrolyte contains a lithium salt, organic solvent, and a polyethersulfone additive with a low critical solution temperature (LCST). This additive gels at higher temperatures, reducing ion transport and adsorbing on the electrode surface to prevent runaway. The battery also has a resistance ratio between 25°C and 60°C of 1.5-3.0, indicating increased resistance with temperature to degrade performance and prevent runaway.

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Electrolyte for high voltage lithium-ion batteries with improved cycle life and storage performance at high temperatures. The electrolyte contains a solvent, lithium salt, and an additive composition with compounds having the formulas I, II, and III. The additive improves the battery's high voltage capability, cycle performance, and storage stability at elevated temperatures compared to conventional electrolytes.

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Battery electrolyte composition for lithium secondary batteries that improves battery life characteristics like capacity, resistance, and cycle life at high temperatures. The electrolyte contains specific additives selected from vinyl sulfate, lithium difluorodioxalate phosphate, and pentaerythritol bicyclic sulfate. The additive content is 0.15 wt% based on the electrolyte weight. The electrolyte can also contain a lithium salt like LiPF6 at concentrations of 0.05-2 mol/L. The additives optimize battery performance, particularly at high temperatures, compared to conventional electrolytes.

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Electrolyte for lithium secondary batteries with improved high-temperature performance, initial resistance, rapid charging, and cycle life compared to conventional electrolytes. The electrolyte contains a specific additive compound, organic solvents, and lithium salts. The additive compound is a cyclic ether with substituted alkyl groups. The organic solvents are a mixture of linear and cyclic carbonates. The electrolyte also optionally includes auxiliary additives like cyclic sulfates, sultones, and fluorinated carbonates. The additive and solvent combination provides enhanced stability, resistance, and capacity retention during high-temperature charging and discharging of lithium batteries.

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Electrolyte for lithium secondary batteries with improved performance and lifespan, especially at high temperatures, by adding a specific compound to the electrolyte. The compound is represented by the formula R1R2C2-C8L1L2, where R1, R2 are substituted or unsubstituted cyclic ether groups, and L1, L2 are substituted or unsubstituted alkylene groups. The compound is added in an amount of 0.1-5% to the electrolyte along with lithium salts and organic solvents. This improves initial resistance, rapid charging, capacity retention, and reduces expansion/thickening of lithium batteries at high temperatures.

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Electrolyte for lithium-ion batteries with improved cycle life, storage performance and safety at high temperatures. The electrolyte contains lithium salt, organic solvent, methylene methane disulfonate (MMDS) and trifluoro(pyridine)boron (PBF). MMDS passivates the positive electrode and PBF passivates the negative electrode, preventing SEI film degradation and gas generation. The synergistic effect of MMDS and PBF enhances battery performance at high temperatures. The electrolyte composition is 0.5-0.8M LiPF6, 0.2-0.4M LiBF4, 50-85% solvent, 0.3-0.5% MMDS, 0.3-0.5% PBF, and 0.1

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Electrolyte for lithium-ion batteries that improves high temperature performance and reduces thermal runaway risk. The electrolyte contains 2-20% lithium salt, 0.1-10% of a specific additive called a "first additive," and 0.1-10% of other additives in a non-aqueous organic solvent. The first additive has a general formula [CnH2n-2n-2C(CF3)nC(CF3)(CF2CF3)2C(CF3)nC(CF3)nCF3] where n=2-5. This electrolyte composition helps prevent dissolution of transition metals from the cathode, reduces side reactions, and improves cycle stability and safety at high temperatures compared to conventional electrolytes.

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Electrolyte composition for lithium-ion batteries that improves battery performance, especially high-rate charging, high-temperature cycling, and longevity, by forming a durable SEI coating on the negative electrode. The electrolyte contains a lithium salt, a non-aqueous organic solvent, and an additive with a specific compound. The compound is represented by formula 1: -CH2-C(=O)-O-C(=O)-CH2- (1) This compound adds to the electrolyte to reduce gas generation at high temperatures, prevent decomposition of the electrolyte, and form a uniform SEI coating on the negative electrode.

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Non-aqueous lithium battery electrolyte and secondary lithium battery with improved performance in harsh environments and cycle life. The electrolyte has a high concentration of lithium salt (3M or more) to suppress dendrite growth and corrosion. Additives like ethylene carbonate, ethylene sulfate, and lithium difluorophosphate further improve stability. Thinner solvents like halogenated hydrocarbons reduce viscosity. This allows using the high-concentration electrolyte in batteries without compromising infiltration between electrode layers.

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A lithium-ion battery module for electric vehicles that improves performance, reliability, and cost compared to conventional lithium-ion batteries. The module has a housing with compartments for individual lithium-ion cell elements. A lid seals the compartments and routes electrolyte into them. This allows independent management of the cell elements for better temperature regulation and fault isolation. It also enables easier manufacturing and maintenance compared to integrally molded cells.

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Lithium ion battery with improved high temperature cycling performance and safety. The battery uses a modified electrolyte containing specific additives. The additives include a cyclophosphazene compound, lithium fluorophosphate, and silane compounds. These additives absorb water, mitigate alkali reactions, and stabilize the electrolyte at high temperatures to prevent deterioration of high nickel-content positive electrode materials in lithium ion batteries.

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Electrolyte composition and lithium-ion battery design that improve cycle life and high temperature storage performance, particularly for batteries with silicon-based anodes. The electrolyte contains lithium salt, organic solvent, and a composite functional additive of fluoroethylene carbonate, propylene sulfite, and compounds I and II. Compound I has the structural formula shown, and compound II has formulas shown in the patent. These additives reduce water and acidity in the electrolyte while forming a dense SEI film on the electrode surfaces. This improves cycle stability and high temperature storage compared to conventional electrolytes.

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Electrolyte for lithium secondary batteries that improves stability, cycle life, and thermal performance. The electrolyte contains an organic solvent, lithium salt, and a specific ionic compound. The ionic compound has an anion represented by a formula with fluorinated alkyl groups and a cation with short alkyl groups. This ionic compound prevents battery ignition, suppresses expansion, and improves stability at high temperatures. Additives can further enhance performance. The electrolyte composition enables better battery operation at high temperatures and voltages.

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Electrolyte composition for lithium-ion batteries with improved stability and cycling performance at high temperatures. The composition contains a cyclic carbonate electrolyte component like fluoroethylene carbonate and an additive with a 6-membered heterocyclic sulfate like 1,3-propylsulfate. This combination provides stable electrolytes for lithium-ion batteries that can operate well at high temperatures without degrading. The cyclic carbonate improves stability and cycling at high temperatures, while the sulfate additive further enhances stability. The composition can be used in lithium-ion batteries for applications like electric vehicles, grid storage, and electronics.

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Electrolyte composition for lithium batteries that improves high-temperature stability and cycle life compared to conventional electrolytes. The electrolyte contains lithium difluorophosphate, sultam-based compounds, and organic solvents. The sultam compounds reduce internal resistance increase at high temperatures. The lithium battery with this electrolyte has better recovery capacity after storage at 60°C compared to conventional electrolytes.

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Electrolyte and lithium-ion battery with improved cycle life for silicon anode lithium-ion batteries. The electrolyte contains compounds like hexamethyldisiloxane along with additives, lithium salt, and solvent. These specific electrolyte components help mitigate the volume expansion and SEI rupture issues of silicon anodes during charging and discharging, improving cycle life compared to traditional electrolytes. The battery using this electrolyte has higher capacity retention and lower capacity fade over cycling versus conventional electrolytes.

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Electrolyte composition for lithium-ion batteries that improves low temperature performance compared to conventional electrolytes. The electrolyte contains lithium salt, organic solvent, and additives. The additives include compounds like 3-ethoxypropyl p-toluenesulfonate and 2-ethoxypropyl p-toluenesulfonate. The electrolyte composition allows higher conductivity at low temperatures while maintaining good performance at normal temperatures.

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Electrolyte composition for lithium ion batteries with reduced capacity fade and impedance growth during high temperature storage. The composition replaces LiPF6, a primary conductive salt that can degrade battery performance, with LiFSI. It also uses specific amounts of cyclic carbonate, linear carbonate, vinyl sulfite, fluoroethylene carbonate, and propionate derivatives solvents. This composition, with LiFSI as the main conductive salt and specific additives, mitigates capacity fade, especially at high SOC and high temperatures.

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Solid polymer electrolyte composition, solid electrolyte, and lithium secondary battery with improved performance at low temperatures and electrochemical stability. The solid polymer electrolyte composition contains a specific ion conductive polymer compound with an ester side chain. This polymer improves ion mobility, electrochemical stability, and output characteristics of solid electrolytes for lithium batteries at low temperatures. The composition also includes a monomer compound to crosslink the polymer and a plasticizer. The solid electrolyte formed from this composition has improved ionic conductivity and electrochemical stability.

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Lithium ion battery electrolyte composition that suppresses gas production and improves cycle life. The electrolyte contains a lithium salt with an alkenyl substituent like vinyl, a cyclic ester additive like vinyl carbonate, and a cyclic sulfate additive like vinyl sulfate. The additives are present in specific weight percentages relative to the lithium salt and solvent. The cyclic ester and sulfate additives in the electrolyte improve cycle stability and gas suppression compared to conventional electrolytes.

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Electrolyte for lithium-ion batteries with improved high temperature performance to enable safer and longer life batteries for applications like electric vehicles in hot climates. The electrolyte contains specific additives that form a stable and protective SEI (solid electrolyte interface) layer on the electrode surfaces during charging and discharging. The additives are high temperature resistant compounds like vinyl-containing lithium malonate borates, vinyl sulfate, tris(trimethylsilane) borate, and lithium difluorophosphate. These additives synergistically enhance SEI stability, reduce impedance, prevent electrode material destruction, and improve cycle efficiency at elevated temperatures.

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Electrolyte additive and electrolyte for lithium secondary batteries that improve battery performance at high temperatures. The additive composition includes a lithium borate compound and a lithiation additive selected from lithium borates, lithium phosphates, lithium sulfates, and imidium lithiums. The additive composition does not contain non-lithiated phosphate compounds. This additive formulation promotes strong, uniform SEI formation on the negative electrode for better cycle life and high temperature performance.

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Electrolyte for lithium secondary batteries that improves high-temperature durability, safety, and uniformity of the electrode protective layer. The electrolyte contains a polymer compound represented by formula (1), a lithium salt, and an organic solvent. The polymer compound has a molecular weight of 1000-35000 and contains repeating units with hydrogen, halogen, alkyl, alkoxy, or halogen-substituted groups. The polymer forms a uniform protective layer on the electrodes and prevents side reactions. The electrolyte composition improves high-rate life performance, high-output characteristics, and safety compared to conventional electrolytes.

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Solid polymer electrolyte for lithium batteries with improved ionic conductivity and electrochemical stability. The electrolyte composition contains a polyacrylate polymer with a specific monomer structure, a crosslinking monomer, lithium salt, and optionally a plasticizer. The polyacrylate monomer has an acrylate-based compound with a specific substitution pattern. This composition forms a solid polymer electrolyte with improved ionic conductivity, reduced crystallization, and better electrochemical stability compared to conventional solid electrolytes. The crosslinking monomer helps prevent electrolyte cracking and swelling.

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Electrolyte additive for lithium-ion batteries that improves high-rate charging, suppresses gas generation during high temperature storage, and enhances battery life. The additive composition contains a lithium borate compound and a cyano compound, but does not include phosphate esters. The additive improves battery performance by forming a strong SEI on the negative electrode to prevent side reactions and improve cycling stability.

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Lithium-ion battery electrolyte with additives to improve high-voltage stability and cycle life at high temperatures. The electrolyte contains a non-aqueous solvent, lithium salt, and three types of additives: 1) 1,2,4-oxadiazole compounds that reduce acidity and oxidize to form stable films on the electrode; 2) polyphenol compounds that complex transition metal ions to prevent dissolution; 3) Lewis base compounds that complex acidic electrolyte components to reduce decomposition. The synergy between these additives improves high-voltage stability, cycle life, and temperature stability of lithium-ion batteries.

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Electrolyte formulation for lithium-ion batteries that reduces self-discharge, improves rate performance, and enhances high and low temperature performance. The electrolyte contains lithium salt, non-aqueous organic solvent, and specific additives like carbonate, sulfonic acid, and boric acid. The composition aims to mitigate self-discharge issues in lithium-ion batteries, such as irreversible reactions between the electrodes and electrolyte, impurities, and micro-short circuits.

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Solid polymer electrolyte for lithium batteries with improved ion conductivity and electrochemical stability. The electrolyte is formed from a composition containing specific acrylate-based monomers that have vinyl groups for polymerization and crosslinking. One monomer is a first acrylate-based compound with a structure containing an acrylate group and optionally an alkyl or heteroalkyl group. The other monomer is a second crosslinking compound with multiple vinyl groups. This composition is cured to form a 3D crosslinked polymer electrolyte with enhanced ionic conductivity and electrochemical stability compared to conventional polymer electrolytes.

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Non-aqueous electrolyte for lithium-ion batteries that provides good cycling performance at both high and low temperatures. The electrolyte contains specific additives in addition to the typical lithium salt and solvent. The additives are (trimethylsilane) phosphate ester, vinylene carbonate, and vinyl sulfate. The ester accelerates desolvation of lithium ions on the negative electrode to reduce impedance. Vinylene carbonate improves cycle performance by forming a dense SEI film. The sulfate improves high temperature cycling without deteriorating impedance. The combination of these additives provides balance between high and low temperature performance compared to using individual additives.

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Gel polymer electrolyte for lithium batteries with improved safety, wettability, and stability at high temperatures. The gel electrolyte composition includes a specific oligomer with hydrophilic and hydrophobic functional groups. The oligomer improves wetting of the electrodes and reduces side reactions during charging. The composition also contains a polymerization initiator. The electrolyte is prepared by injecting the composition into the battery and polymerizing it in an inert atmosphere. The resulting gel electrolyte provides improved high-temperature stability compared to conventional electrolytes.

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Electrolyte formulation for lithium-ion batteries with improved low-temperature performance and high-temperature stability. The formulation includes additives like tris(2,2,2-trifluoroethyl) borate, (Difluoromethyl) linjun diethyl ester, and ethyl difluoroacetate. These additives improve low-temperature power while maintaining high-temperature stability better than conventional electrolytes. The formulation also uses specific solvent blends containing compounds like 2,2,2-trifluoroethyl methyl carbonate. The additives and solvent blends enable batteries with better low-temperature performance and high-temperature stability compared to conventional electrolytes.

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Low internal resistance lithium secondary battery electrolyte that improves battery performance at high temperatures, low temperatures, and during fast charging without compromising safety or cycle life. The electrolyte contains fluorolithium phosphate (LiPF6) as the lithium salt instead of traditional LiPF6, which reduces thermal decomposition issues. The electrolyte also includes fluorinated boronic acid esters to form a stable SEI film on the negative electrode surface. This improves low-temperature charging and high-rate charging performance compared to using fluoroborate alone. By using LiPF6 and fluorinated boronic acid esters, the electrolyte has reduced internal resistance, good low-temperature performance, and cycle life without the need for complex additive formulations.

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High-voltage and high-energy density electrolyte for lithium-ion batteries that enables improved performance of batteries using high-voltage cathode materials like lithium sulfate. The electrolyte contains specific additives like fluorinated ethers, acid tinctures, 1,3-propane sultone, fluorine-based additives, and fluoroethylene carbonate. The additive ratios are optimized to reduce SEI impedance, improve cycle life, and maintain performance at high temperatures and low temperatures compared to conventional electrolytes.

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Preventing Li dendrite growth in Li-ion and Li-S batteries to enable stable and long-lifetime batteries without internal short circuits and thermal runaway. The key is a hybrid artificial solid-electrolyte interphase (A-SEI) layer on the anode that contains a blended material with crystalline graphene domains and flexible wrinkle areas. This blended material inhibits Li dendrite growth between the anode and cathode. The A-SEI layer also has a polymer matrix to bind the components. The blended material includes curable carboxylate salts to crosslink during charge/discharge cycles. The flexible wrinkle areas contract during polymerization to reduce A-SEI volume changes. This prevents Li dendrites and internal shorts. The porous cathode expands for PS shuttle mitigation.

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Imidazolium-based lithium salt, method for preparing it, and electrolyte composition containing it for lithium-ion batteries. The salt is synthesized by functionalizing an imidazolium ionic liquid with lithium (fluorosulfonyl) imide. The salt has wide electrochemical stability, high thermal stability, and good ionic conductivity. The electrolyte composition using this salt provides high cycling stability and specific capacity for lithium-ion batteries compared to conventional electrolytes.

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Lithium-ion battery with improved safety and cycle life when using lithium titanate (LTO) anode and a phosphate-based compound as an electrolyte additive. The phosphate compound reduces gas generation during charging and discharging compared to conventional electrolytes, especially when using LTO anode. This improves safety by reducing swelling and explosion risks. The phosphate additive concentration should be optimized to balance safety and performance.

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High-voltage electrolyte for lithium-ion batteries that allows operating voltages of up to 5.5V without gas generation and decomposition issues. The electrolyte contains lithium hexafluorophosphate (LiPF6) as the main salt, along with additives like lithium difluorophosphate (LiDFP), lithium difluorooxalate (LiDFOP), and lithium tetrafluoroborate (LiBFO). It also has the organic solvent difluoroethyl acetate (DFEA). This electrolyte enables stable cycling of high-voltage cathodes like nickel-rich NMCs and provides improved rate performance and cycle life compared to conventional carbonate electrolytes.

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Electrolyte for lithium-ion batteries that improves performance at high temperatures and voltages while also enhancing safety. The electrolyte contains specific additives like lithium alkyl sulfates and fluorinated esters that form a protective film on the electrodes. This film stabilizes at high temperature/pressure and prevents decomposition compared to traditional film-forming additives. The electrolyte also contains organic solvents with ester groups. The additives and solvents are selected to provide a balance of properties like storage, cycling, rate, and low-temp performance.

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High temperature electrolyte compositions for lithium-ion batteries that enable safe operation at temperatures above 70°C and potentially above 250°C. The compositions contain organosilicon compounds like bis(trifluoromethanesulfonyl)imide (F1S3MN) and bis(trifluoromethanesulfonyl)imide lithium salt (LiTFSI) as the imide, along with organosilicon compounds as solvents. This combination provides improved thermal stability compared to traditional carbonate-based electrolytes. The OS compounds like F1S3MN are non-flammable, high temperature resistant materials that make them suitable as electrolyte solvents for batteries.

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Improving the high-temperature electrochemical performance of lithium-ion batteries by adding small amounts of specific ionic liquids to the non-aqueous electrolyte. The ionic liquids, containing anions like F, S, N, and C, are added at concentrations of 0.01-30 wt% to the electrolyte alongside the lithium salt and organic solvent. This improves cycle performance and thermal stability of the batteries at elevated temperatures compared to conventional electrolytes. The ionic liquids prevent lithium salt degradation and electrode film formation at high temperatures.

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Non-aqueous electrolyte for lithium-ion batteries with improved cycle life, rate performance, and low-temperature discharge capability. The electrolyte contains lithium salt, organic solvent, and additives including lithium difluoroborate sulfate and a cyclic sulfate compound. The cyclic sulfate compound has a cyclic structure with sulfate groups. The lithium difluoroborate sulfate and cyclic sulfate improve high-temperature cycling, storage, and discharge performance while avoiding thick solid electrolyte interface (SEI) film formation. The optimal concentrations of the additives are 0.15-2.5% lithium difluoroborate sulfate and 0.3-1.5% cyclic sulfate compound.

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Electrolyte composition for lithium-ion batteries that enables high-rate charging, long-life cycle performance, and good low-temperature operation. The electrolyte contains tri-tert-butyl borate, vinylene carbonate, and 1,3-propane sultone as additives. The borate ester forms a dense, uniform SEI film on the negative electrode that reduces interface impedance and improves cycle life. The carbonate and sulfone additives improve high-rate charging and low-temp performance. This electrolyte allows lithium-ion batteries to have both good high-temperature and low-temperature performance, unlike conventional electrolytes that sacrifice one for the other.

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Lithium cell with improved electrolyte separator to prevent issues like dendrite growth, swelling, and shorting in high-temperature applications. The separator is a gel containing wettable fibers with high surface tension. The fibers are wettable by the lithium ion conducting salt solution and have a surface tension of at least 30 mN/m. This prevents penetration by lithium dendrites and provides mechanical stability at high temperatures. The gel can also contain a nonaqueous, polar lithium ion conducting salt solution. The wettable fibers allow good wetting of the gel by the electrolyte and prevent dry spots. The improved separator enables better performance and safety of the lithium cell, especially in high-temperature environments.

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Electrolyte and lithium ion battery with improved performance by reducing internal resistance and enhancing stability of the positive and negative electrode interfaces. The electrolyte contains specific additives, dinitrile compounds with ether bonds and fluoroborate compounds, in addition to the usual solvent and salt. The additives form low-impedance films on the electrode surfaces to improve cycle life, power, and lithium evolution. The dinitrile ether provides stability at the positive electrode, while the fluoroborate modifies the negative electrode.

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Microscopically ordered solid electrolyte architectures for solid-state and hybrid lithium-ion batteries that enable high energy density, fast charging, and improved safety over traditional lithium-ion batteries. The architecture consists of a porous scaffold made of a lithium-conducting ceramic that can be infiltrated with cathode or anode active materials. The porous scaffold prevents short circuiting and allows high capacity loading. The ceramic scaffold is made by casting, freeze casting, and sintering nanoparticle slurries. The architecture enables energy densities over 300 Wh/kg and can have features as small as 25 microns for facile removal of carbon during sintering.

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A non-aqueous electrolyte for lithium ion batteries that uses high nickel ternary materials as the positive electrode and graphite as the negative electrode. The electrolyte contains specific additives, like 4,4'-dipinacol borate diphenyl sulfone, dipyridyl carbonate, and lithium difluorophosphate, that significantly improve cycle life, storage life, and safety of the battery compared to conventional electrolytes. The additives form protective films on the electrode surfaces to reduce side reactions and gas production during cycling. The optimized additive ratios and solvent composition are provided.

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Non-aqueous electrolyte for lithium-ion batteries with improved cycle life, high-voltage stability, and power characteristics. The electrolyte contains functional additives like pentafluorophenyl vinyl sulfonate, 3-trifluoromethyl-5-methoxybenzonitrile, and lithium difluorophosphate. These additives enhance compatibility between the positive and negative electrodes with the electrolyte, reducing impedance and improving interface stability. The electrolyte composition also includes solvent mixtures and lithium salt.

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