High Conductivity Electrolytes for EV Batteries

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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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 composition, electrolyte, and battery with improved ionic conductivity for lithium-ion batteries. The electrolyte composition contains an inorganic solid electrolyte like oxide or sulfide, a polymer with ion preferential conduction ability, and an ionic liquid. The solid electrolyte provides high ionic conductivity, the polymer enhances conductivity and flexibility, and the liquid helps processing. The combination allows high ionic conductivity exceeding 10-4 S/cm at 25°C, lower activation energy, and improved battery performance.

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Electrolyte composition for lithium-ion batteries with improved rate performance and cycle life by using specific solvents and salt. The composition replaces traditional ethylene carbonate solvent with a combination of dimethyl carbonate and ethyl methyl carbonate, along with a higher concentration of lithium bis(fluorosulfonyl)imide salt. This provides a more conductive SEI layer on the battery anode and better electrolyte solvent properties for higher rate capability and cycle stability compared to standard lithium-ion battery electrolytes.

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Electrolyte composition, electrolyte, and battery with improved ionic conductivity for lithium-ion batteries. The electrolyte composition contains an ion-conducting inorganic solid electrolyte, a polymer with metal ion conduction ability, and an ionic liquid. The solid electrolyte can be an oxide, sulfide, hydride, or halide containing alkali and alkaline earth metals. The polymer has anionic functional groups with metal ions and anion-trapping functional groups. The composition has high ionic conductivity, low activation energy, and low dynamic hardness compared to solid electrolytes alone. The composite electrolyte enables higher ionic conductivity for better battery performance.

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Solid electrolyte for all-solid-state batteries that has both high ionic conductivity and electrical conductivity. The electrolyte contains a mixed conductive polymer and lithium salt. The mixed conductive polymer has ionic and electronic conduction properties, allowing it to simultaneously transport lithium ions and electrons. This enables high ionic and electronic conductivity in the solid electrolyte.

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Solid electrolyte for all-solid-state batteries with improved ionic and electronic conductivity for high performance all-solid-state batteries. The electrolyte is a composite of a mixed conductivity polymer and a lithium salt. The mixed conductivity polymer has both ionic and electronic conductivity. The lithium salt provides the needed lithium ions for battery operation. The optimized ratio of mixed conductivity polymer to lithium salt provides the balance of ionic and electronic conductivity needed for all-solid-state batteries. The electrolyte can be made by coating a mixed solution of the polymer and salt on a substrate and drying it to form the solid electrolyte membrane.

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Electrolyte composition for lithium-ion batteries that can be processed at high temperatures for extrusion, hot rolling, and hot pressing without decomposition or volatility issues. The electrolyte contains 5-25% lithium salt, 2-10% additives, and 65-93% solvent. The solvent is a mixture of ethylene carbonate (EC), propylene carbonate (PC), and vinylene carbonate (VC) in specific ratios. The composition provides stable electrochemical performance at high temperatures, low vapor pressure, and flash point above 100°C for high-temperature processing.

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Electrolyte composition for lithium-ion batteries that improves cycling performance, particularly at high temperatures, when used in batteries with high cathode voltages. The electrolyte contains a fluorinated compound like CF3COOCH3, a non-fluorinated carbonate, a lithium/boron compound, and a lithium salt. The electrolyte enables higher cycle life and lower gas generation compared to conventional electrolytes at high temperatures.

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Electrolyte composition for lithium-ion batteries that enables high voltage operation, improved cycling and storage at elevated temperatures. The electrolyte contains a specific additive composition, typically 0.01-20% by weight, along with a lithium salt. The additive helps prevent oxidation of the electrolyte at high voltages. The composition improves battery performance and lifespan at voltages above 4.4V, which is needed for higher energy density lithium-ion batteries.

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Fast-charging electrolyte for lithium-ion batteries that improves high/low temperature charge/discharge performance and fast charging speed. The electrolyte contains specific solvents, lithium salts, and additives in a balanced ratio. The additives include vinylene carbonate, ethylene carbonate, fluoroethylene carbonate, lithium difluorophosphate, and lithium difluoroxalate borate. The electrolyte also contains trimethylsilyl isocyanate and tetrabutylammonium perchlorate. This composition balances electrode/electrolyte interface properties for better cycle life, temperature performance, and fast charging.

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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 composition for lithium-ion batteries that enables high voltage operation beyond 4.5V. The electrolyte contains specific amounts of lithium bis(trifluoromethanesulfonyl)imide salt, 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether solvent, sulfolane cyclic sulfone, and 0-15% fluoroethylene carbonate. The composition allows stable high voltage operation in lithium-ion batteries above 4.5V, while also having improved safety compared to conventional electrolytes.

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Lithium-ion battery electrolyte that reduces internal resistance, especially during fast charging, and improves safety by stabilizing the positive electrode and suppressing gas generation. The electrolyte contains difluorophosphate compounds and cyclic ester additives like vinylene carbonate, 1,3-propane sultone, and vinyl sulfate. The difluorophosphate compounds coordinate with positive electrode transition metals to stabilize them, while the cyclic esters improve film formation on the electrodes during charging.

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Electrolyte for lithium-ion batteries that improves safety, energy density, cycle life, and dendrite growth inhibition. The electrolyte contains a fluorinated solvent, fluorinated sulfonimide lithium salt, and lithium halide additive. The fluorinated solvent provides flame retardancy and improved conductivity. The fluorinated sulfonimide salt improves stability at high voltages. The lithium halide additive further enhances stability and inhibits dendrite growth. The electrolyte composition balances properties like conductivity, flammability, stability, and dendrite growth inhibition for better overall battery performance.

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Electrolyte composition for lithium-ion batteries that improves stability, charge/discharge cycling, and reduces dendrite growth compared to conventional electrolytes. The electrolyte contains an ionic liquid with phosphorus and sulfur elements as a functional additive. The ionic liquid improves battery performance by stabilizing the electrolyte solvation structure and reducing lithium dendrite formation. The additive is present in a weight percentage of 0.01-10%. The electrolyte also includes an organic solvent like carbonate esters and fluoroethers.

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Electrolyte composition, electrolyte membrane, electrode, battery, and evaluation method for batteries with improved charge/discharge performance. The electrolyte composition contains alkali metal salt at a concentration of 1.8 mol/kg or higher, along with specific polymers like polyethers, (meth)acrylics, cyanides, fluorines, and ion dissociation accelerators. This composition allows high ionic conductivity for superior battery performance. The evaluation method involves sandwiched between two alkali metals, applying DC current, and calculating resistance from voltage/current rise.

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Lithium battery electrolyte with improved dendrite growth inhibition compared to conventional electrolytes. The electrolyte has two layers: a first layer close to the negative electrode with higher ion conductivity and a second layer farther away with lower ion conductivity. The higher conductivity near the negative electrode prevents dendrite growth. The lower conductivity farther away reduces short circuits. This two-layer electrolyte design allows tuning conductivity gradients for dendrite suppression and protection.

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Solid electrolyte material for all-solid-state lithium batteries that can provide high lithium ion conductivity and stability for direct contact with lithium metal anodes. The solid electrolyte is made by a method involving reacting Li, S, phosphorus sulfides, metal halides, and optionally metal sulfides to form a composition with general formula LixMyzPSx, where x, y, and z are molar ratios. The method involves heating the reactants to form the solid electrolyte. The solid electrolyte can be used as a cathode, anode, or separator component in all-solid-state lithium batteries.

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A solid-state lithium battery with improved ionic conductivity for use in solid-state lithium batteries. The battery uses a solid electrolyte material with composition derived from Li65P025Si025Ge025Sb025S5. The electrolyte material has high lithium ion conductivity when prepared by ball milling and natural cooling. The solid electrolyte can be used as a component in battery cathodes, anodes, and separators. The solid-state battery structure provides advantages like eliminating the need for liquid electrolytes, improving safety and cycling stability, and enabling higher energy densities compared to conventional liquid electrolyte batteries.

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