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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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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Electrolyte composition for high energy density lithium-ion batteries that improves the performance and safety of batteries used in electric vehicles. The electrolyte composition contains specific ratios of carbonate solvents (ethylene carbonate, diethyl carbonate, methyl ethyl carbonate) along with 1,3-propane sultone, ethylene sulfate, and lithium difluorophosphate. The composition provides high energy density, improved cycling stability, and reduced dendrite growth on the anode compared to conventional electrolytes.

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High-voltage fast-charge lithium-ion battery electrolyte containing methyl trifluoroacrylate to enable high voltage operation above 4.35V and fast charging in lithium-ion batteries. The electrolyte composition includes lithium salt, methyl trifluoroacrylate, organic solvents, and additives. The methyl trifluoroacrylate improves ionic conductivity and battery performance at high voltages. The electrolyte is prepared by mixing the components in a glove box with controlled moisture and oxygen levels.

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A lithium battery design with improved safety and energy density by using high-concentration lithium salt and ionic liquid electrolytes in the battery's membrane-electrode assembly (MEA). The MEA contains a high-lithium salt electrolyte in the cathode and a composite separator with solid electrolyte and ionic liquid. This prevents lithium plating and improves cycle life compared to using just liquid electrolytes. The solid electrolyte separator prevents solid-state electrolyte impregnation into the electrodes, but the ionic liquid electrolyte allows better lithium mobility. This balance between liquid and solid electrolytes improves safety and performance.

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Solid-state lithium-ion battery with improved conductivity and method of manufacturing it. The battery uses a solid electrolyte instead of the flammable liquid electrolytes in conventional lithium-ion batteries. The solid electrolyte is made by coating a special composite layer on the battery electrodes. The composite layer contains modified zeolite, modified diatomite, sodium lignosulfonate, graphene oxide, and a binder. This composite improves the conductivity of the solid electrolyte compared to traditional solid electrolytes.

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Electrolyte composition for lithium-ion batteries with improved high-temperature cycle performance, particularly for batteries operating with high potential cathodes. The electrolyte contains a combination of fluorinated compounds, non-fluorinated carbonates, lithium/boron compounds, and lithium salts. The fluorinated compounds improve cycle life by reducing side reactions and enabling higher cutoff voltages. The non-fluorinated carbonates provide solvent properties. The lithium/boron compounds enhance electrolyte stability. The lithium salts complete the electrolyte formulation. The electrolyte can be used in lithium-ion batteries with high voltage cathodes like spinel oxides.

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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 ion batteries that can mitigate capacity fade and impedance increase in high temperature storage conditions. The composition includes LiFSI as the primary conductive salt, along with specific amounts of cyclic and linear carbonate solvents (VC, FEC), propionate derivatives, and sulfones (PS, ES). This composition provides improved electrochemical performance, such as reduced capacity decay and impedance rise, compared to standard LiPF6 electrolytes. The specific ratios of these additives optimize the benefits of using LiFSI as the primary salt.

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Solid electrolyte materials for all-solid-state lithium batteries that have high lithium ion conductivity and stability with lithium metal anodes. The solid electrolytes have compositions containing Li, Sb, S, and Cl, Br, or I substituents. The electrolytes are prepared by heat treating mixtures of precursors like Li2S, Sb2S3, LiX, and elemental S or sulfides. The resulting solid materials have compositions like Li7+xMxSb1-xS6-yXy where 0.05 <= y <= 2. The solid electrolytes can be used in solid state batteries with lithium metal anodes without the need for protective layers. The solid electrolyte materials can also be used as cathode, anode, or separator components in solid state batteries.

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Solid electrolyte for lithium-ion batteries that improves safety by eliminating flammable liquid electrolytes. The solid electrolyte contains an electron transfer complex and ion source. It has high room temperature ionic conductivity >1e-4 S/cm. The electron transfer complex is solid at room temp, has a molecular weight >100g/mol, and an electron affinity >1.3eV. The high isotropic conductivity allows thin solid electrolyte membranes for battery separators. The solid electrolyte can be prepared by mixing the electron transfer complex and ion source.

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Lithium ion secondary battery with improved safety and ionic conductivity. The battery has a unique electrode assembly design where a solid electrolyte membrane is interposed between the negative and positive electrodes and impregnated with a liquid electrolyte. This configuration improves safety by reducing the risk of thermal runaway and overcharging compared to using just a liquid electrolyte. It also improves ionic conductivity compared to using just a solid electrolyte. The solid electrolyte membrane is pressed into the electrodes to a certain depth. A binder layer between the membrane and electrodes contains an insoluble or low solubility resin in the liquid electrolyte to prevent dissolution. The binder can be patterned with uncoated areas to reduce electrode-electrolyte interfacial resistance. The frame-shaped binder on the electrode edges provides mechanical support.

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Additive materials for lithium-ion batteries to improve ionic conductivity, especially for all-solid-state batteries, by adding high-speed ion conduction channels in the electrode. The additives are solid materials with compositions like LiAxBxInzCl3 or LiAxMxBzF, where A, M, and X are selected elements. These additives can be used in battery electrodes, electrolyte layers, or as standalone additives in the electrode coating process. They provide high-speed ion conduction paths in the electrode to enable faster charging and discharging, especially for all-solid-state batteries that lack the infiltration of liquid electrolytes.

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Electrolyte composition for lithium-ion batteries with improved cycling efficiency for high voltage, lithium-metal anodes. The electrolyte contains lithium bis(trifluoromethansolfonyl)imide (LiTFSI), 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE), sulfolane (SL), and fluoroethylene carbonate (FEC) in specific volume ratios. The SL/LiTFSI molar ratio is 1-5, the TTE/LiTFSI molar ratio is 1-5, and the SL/TTE molar ratio is 2-3. This composition enables high coulombic efficiency and stable cycling of lithium-metal anodes at high volt

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Electrode for all-solid-state lithium ion batteries that improves performance by enhancing lithium ion conductivity at the electrode interfaces. The electrode contains a lithium ion conductive solid electrolyte added to the active material. This reduces the need for an external solid electrolyte layer and improves overall battery performance. The solid electrolyte added to the electrode can be an oxide-based or sulfide-based lithium ion conductive solid electrolyte. However, the oxide-based electrolyte has lower adhesion and conductivity compared to the sulfide-based electrolyte. To balance safety and conductivity, a lower concentration of sulfide-based electrolyte can be used instead of pure sulfide-based electrolyte. This reduces the safety concerns of sulfide-based electrolytes while still enhancing conductivity

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Lithium ion battery electrolyte composition that improves cycle life at normal and elevated temperatures, particularly for batteries with silicon anodes. The electrolyte contains fluoroethylene carbonate as the organic solvent, lithium phosphate (LiPF6) as the lithium salt with a concentration of 1.3 mol/L or higher, and optionally other additives like lithium nitrate (LiNO3). The combination of these components provides better cycle performance, especially for silicon anodes, compared to conventional electrolytes. It helps prevent capacity fade, pulverization, and gas generation issues associated with silicon anodes.

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Electrolyte composition for lithium-ion batteries in electric vehicles that improves low temperature direct current fast charging (DCFC) capability. The electrolyte contains a lithium salt, a non-aqueous solvent, and a fluorinated cyclic carbonate co-solvent. The fluorinated carbonate has a cyclic ring with a fluorine atom directly bonded to it. This fluorinated co-solvent helps reduce lithium desolvation energy at low temps, enabling better DCFC.

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Electrolyte composition for lithium metal batteries that enables high ionic conductivity and low viscosity at high electrolyte concentrations. The composition contains 3-25 wt% LiDFP and 30-110 wt% LiTFSI in an ether-based solvent. This allows high electrolyte concentration (35-55 wt%) with good ionic conductivity (5 mS/cm) and low viscosity (4.5-10 cP). It improves the performance of lithium metal batteries by enabling higher concentrations without sacrificing conductivity and viscosity.

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Solid electrolyte membrane for all-solid-state batteries that suppresses lithium dendrite growth. The membrane has an ionic conductivity of 1x10-7 S/cm or more. It contains a dendrite growth inhibiting material derived from metals with lower ionization tendency than lithium or alloys of such metals. The inhibiting material can form self-assembled micelles in a copolymer matrix. This patterned suppression layer is sandwiched between solid electrolyte layers. The high ionic conductivity solid electrolyte membrane prevents dendrite growth between the electrodes.

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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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A liquid electrolyte for lithium metal batteries that improves cycle life, capacity retention, and delays resistance increases compared to conventional electrolytes. The electrolyte contains an aprotic solvent, an ionic liquid compatible with lithium metal, a lithium salt, 8-30 mol % hydrofluoroether, and up to 5 mol % additives. The ratio of hydrofluoroether to lithium salt is 0.22-0.83:1. This composition provides chemical stability with lithium metal, thermodynamic stability at high voltages, and suppression of cathode/electrolyte interface degradation.

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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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Aqueous electrolyte composition for high energy lithium-ion batteries that provides a wide electrochemical window for high energy density while using water as the electrolyte. The electrolyte contains lithium bis(fluorosulfonyl) imide (LiFSI), an ionic liquid with a bis(fluorosulfonyl) imide anion, and water. The ionic liquid is a room temperature ionic liquid (RTIL) that remains liquid at 20°C. This allows the battery to operate with a wider voltage range than conventional aqueous electrolytes. The RTIL stabilizes the water electrolyte, enabling higher voltage anode materials like lithium titanium oxide (LTO) that are not compatible with conventional aqueous electrolytes.

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A high-capacity, high-output rechargeable battery with improved cycle life. The battery uses an electrode containing a conductive polymer, like polythiophene derivatives, and an electrolyte with an ionic liquid. The ionic liquid content in the electrolyte is between 0.3% and 50% by mass. This composition improves capacity retention compared to conventional batteries while maintaining output characteristics. The ionic liquid aids ionic conduction and prevents electrode degradation. The conductive polymer enables high capacity by facilitating electron transfer.

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Electrolyte composition for lithium-ion batteries with improved cycle life, storage stability, and power at extreme temperatures. The electrolyte contains lithium bis(fluorosulfonyl)imide (LiFSI) salt, fluorinated solvents, and conventional electrolyte salts. The fluorinated solvents enhance performance at low and high temperatures compared to non-fluorinated solvents. LiFSI provides additional benefits. This electrolyte composition improves cycle life at low and high temperatures, storage stability at high temperatures, and power at low temperatures compared to conventional lithium-ion battery electrolytes.

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Polymer solid electrolyte composition for high ionic conductivity lithium batteries. The composition contains an ionic conductor, a block copolymer with amorphous segments, and an oxidizing agent. The block copolymer improves ionic conductivity compared to homopolymers. The oxidizing agent helps stabilize the polymer electrolyte during battery operation. This allows higher ionic conductivity and better battery performance compared to traditional polymer electrolytes.

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Fluorinated electrolytes for lithium-ion batteries that have high ionic conductivity, stability, and solubility of lithium salts. The electrolytes contain perfluoropolyacids with terminal groups like cyano (-CN) or nitrile (-NC) instead of the more common methoxycarbonyl (-OCOCH3) groups. The polar cyano groups enhance salt solubility and mobility compared to methoxycarbonyl groups. The electrolytes can be used in lithium-ion batteries with improved performance compared to conventional perfluoropolyacid electrolytes.

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A multi-stage composite solid electrolyte with a three-layer structure for wide potential window lithium batteries. The electrolyte has a layer on the negative electrode side resistant to reduction, a layer on the positive electrode side resistant to oxidation, and an intermediate layer with high ionic conductivity. The layers are made of polymers with specific properties for stability at the electrode interfaces.

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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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Electrolyte for lithium batteries that significantly suppresses lithium dendrite growth by using two or more electrolyte layers with different ion conductivity. The electrolyte has an inner layer with lower ion conductivity followed by an outer layer with higher ion conductivity. The inner layer provides a protective function against lithium plating, while the outer layer has higher ionic conductivity for normal battery operation. This two-layer electrolyte design prevents dendrite growth while maintaining battery performance.

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Lithium ion battery electrolyte formulation that provides improved performance at both high and low temperatures. The electrolyte composition includes a specific ratio of lithium salts, organic solvents, and additives. The lithium salts used are lithium tetrafluoroborate, lithium bisoxalate borate, and lithium bis(fluoromalonate) borate. The additive is ethylene sulfate. This composition allows the battery to have better charge-discharge performance, capacity retention, and cycle stability over a wider temperature range compared to conventional electrolytes.

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A lithium-ion battery electrolyte that provides high ionic conductivity, fast lithium ion migration at the electrode interface, and stability for all-solid-state batteries. The electrolyte contains an ionic liquid, a polymer, a lithium salt, and an inorganic electrolyte. The ionic liquid modifies the polymer to prevent crystallization and promote lithium ion movement. The inorganic electrolyte forms a stable interface and improves voltage window. This allows higher discharge capacity, cycle life, and suppression of dendrite growth compared to traditional polymer electrolytes.

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Electrolyte composition for lithium-ion batteries that improves cycle life, high voltage performance, and low temperature operation. The electrolyte contains specific additives in addition to the conventional solvent and salt. The additives are cyclic carbonates (A), sulfate compounds (B), siloxanes (C), fluorine-containing lithium salts (D), and boron-containing lithium salts (E). The additives enhance electrode protection, ion conductivity, and stability at high voltages and low temperatures.

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Solid-state lithium battery with improved performance using a single-ion conductor polymer electrolyte containing lithium salts. The electrolyte is made of a matrix polymer like PMMA, PEC, or PVAc, mixed with lithium salts like lithium trifluoroborate. The lithium salts improve ion mobility compared to plain polymer electrolytes. This allows higher battery performance at room temperature without leaking or drying out. The solid-state electrolyte is sandwiched between the battery electrodes to create an all-solid-state lithium battery with improved safety, energy density, and cycle life compared to liquid electrolyte batteries.

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Quasi-solid electrolyte for lithium batteries with improved lithium ion conductivity and mechanical strength compared to solid ceramic electrolytes. The quasi-solid electrolyte is made by combining a polymer, ceramic electrolyte, lithium salts, and ionic liquid. The polymer provides mechanical strength, the ceramic electrolyte provides lithium ion conduction, and the lithium salts and ionic liquid improve conductivity. The composition is optimized to balance properties for battery applications.

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