Self-Healing Electrolytes for Enhanced EV Battery Durability

Rechargeable lithium-ion battery that can operate and be charged at extreme temperatures from -30°C to 150°C. The battery uses a specific composition of electrolyte, anode, and cathode materials. The electrolyte contains an ionic liquid, organic compound, and lithium salt. The anode uses lithium titanate (LTO) instead of graphite. The cathode and anode have binders. The ionic liquid electrolyte and LTO anode provide high temperature stability. The organic compound in the electrolyte helps low temperature stability. The binders enhance adhesion and stability.

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Lithium-ion battery electrolyte with enhanced fast charging and storage performance. The electrolyte combines a high-performance organic solvent with a specific concentration of unsaturated inorganic additives, specifically dimethyl carbonate and cyclic carbonate. The dimethyl carbonate content is optimized between 45% and 55%, while the cyclic carbonate content is maintained at 8% to 24%. This composition balances the electrolyte's wettability, thermal stability, and fast charging capabilities, enabling improved battery performance while maintaining reliability.

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Electrolyte for lithium secondary batteries that maintains high voltage stability and capacity retention at elevated voltages. The electrolyte comprises a fluorine-containing cyclic carbonate and a fluorine-containing linear asymmetric carbonate in a volume ratio of 1:9 to 8:2. This composition enables enhanced performance at higher charge voltages without compromising electrolyte stability and capacity.

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Electrolyte for lithium secondary batteries that enhances high-voltage stability and lifespan through a novel composition of fluorine-containing cyclic carbonate and linear asymmetric carbonate. The electrolyte achieves superior performance by incorporating a specific volume ratio of these components, which form a robust SEI (solid electrolyte interphase) layer on lithium metal electrodes. This SEI layer protects the electrodes from electrolyte decomposition and maintains high-voltage stability during repeated charge-discharge cycles.

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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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Non-aqueous electrolyte for lithium-ion batteries that enhances thermal stability and maintains excellent cycle performance. The electrolyte contains a specific combination of trifluoroacetate and pivalate, with a controlled ratio of 0.5-0.5% trifluoroacetate to total electrolyte mass. This formulation balances the electrolyte's thermal stability and separator permeability, enabling reliable operation at high temperatures while maintaining high cycle life. The electrolyte is formulated in a solvent containing ethylene carbonate, propylene carbonate, and γ-butyrolactone, with the trifluoroacetate and pivalate components precisely controlled to achieve optimal performance.

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Electrolyte additive for lithium-ion batteries that enhances high-temperature and high-voltage stability. The additive combines a multifunctional structure that provides both film-forming properties and chemical stability at elevated temperatures. The additive enables the battery to maintain its performance characteristics over a wide operating range, particularly at temperatures above 55°C.

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Electrolyte solution for lithium-ion batteries with improved cycle life and resistance characteristics. The solution contains a specific combination of imidazolium cation, bis(oxalato)borate anion, and hexafluorophosphate anion. The imidazolium cation enhances electrolyte conductivity, while the bis(oxalato)borate anion provides excellent resistance management. The hexafluorophosphate anion further improves electrolyte stability and prevents overcharge-related degradation. The solution achieves these benefits through its unique composition of imidazolium cation, bis(oxalato)borate anion, and hexafluorophosphate anion.

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Sodium-ion battery electrolyte that improves high-temperature performance while maintaining low-temperature and rate characteristics. The electrolyte contains a specific composition of silicon fluorosulfonate, sodium selenocyanate, sodium salt, and functional additives, with optimized concentrations of these components. This composition enables enhanced thermal stability at high temperatures while maintaining the characteristic performance of the battery at lower temperatures.

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A lithium-ion battery electrolyte with improved performance characteristics beyond conventional lithium hexafluorophosphate (LiPF6) binary or ternary mixed solvent systems. The electrolyte contains a weight percentage of an additive within 0.01%-5% of the solvent, enabling enhanced rate discharge capabilities, improved cycle life, and better low-temperature performance.

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Electrolyte composition for lithium-ion batteries that enables higher voltage operation and improved cycle life compared to conventional carbonate electrolytes. The electrolyte contains a fluorinated organic compound with high fluorine content (33 wt% or more) that forms a dense fluorine-rich SEI (solid electrolyte interface) film on the electrode surface. This improves mechanical strength and oxidation resistance of the interface compared to carbonate-based electrolytes. The electrolyte may also contain a boron-lithium salt additive and a second fluorinated compound for further oxidation resistance.

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Lithium-ion battery electrolyte containing a cyano group-containing fatty amine compound improves battery performance and lifespan by eliminating water content and reducing transition metal dissolution. The electrolyte contains the amine compound, which selectively removes moisture and hydrofluoric acid while preventing lithium metal dissolution, thereby enhancing electrochemical stability and capacity retention.

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Electrolyte for lithium-ion batteries that improves long-term cycle performance of Si anodes in carbonate-based solutions. The electrolyte contains lithium salt, organic solvent, and a specific ionic liquid that enhances solid electrolyte membrane stability through coordinated lithium ion coordination. This ionic liquid selectively influences the coordination number of lithium ions in the electrolyte, thereby modifying the SEI film formation mechanism on the Si anode surface. The resulting electrolyte maintains high SEI stability during charge/discharge cycles while maintaining excellent lithium ion conductivity, enabling improved cycle life and capacity retention.

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High-voltage, high-safety polyimide gel polymer electrolyte for lithium-ion batteries, prepared through a novel approach involving the use of polyamic acid solutions as the electrolyte matrix. This approach eliminates the traditional polymer-based electrolyte by directly incorporating the polymer matrix into the electrolyte solution, resulting in a safer, more efficient electrolyte system. The electrolyte maintains high voltage stability and thermal stability while reducing the risk of thermal runaway compared to conventional liquid electrolytes. The electrolyte is prepared through a simple solution process that enables the incorporation of the polymer matrix, making it suitable for high-voltage applications.

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All-fluorine-based carbonate electrolyte for improving the durability of lithium metal anodes in lithium-ion batteries. The electrolyte contains a specific composition of fluorine-containing carbonate solvents like ethylene fluorohydrate (FEC) and difluoroethylene carbonate (DFEC). The all-fluorine-based carbonate electrolyte provides stability on the surface of lithium metal anodes and improves the lifespan and storage characteristics of lithium metal batteries compared to traditional ether-based electrolytes.

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Electrochemical elements comprising a lithium-based anode with improved cyclability through enhanced lithium alloy anode materials. The elements feature lithium-based anodes that can operate at elevated temperatures up to 85°C, enabling up to 25 cycles at 100% depth of discharge without capacity loss. The anode materials incorporate lithium salts with additives like lithium hexafluorophosphate and lithium difluorophosphate, which control electrolyte behavior and passivation. The anode materials also feature metallic lithium or lithium alloys. The elements incorporate an electrolyte composition with a solvent comprising hexafluoromethoxypropane and/or hexafluoro(fluoromethoxy)propane, and a lithium salt with lithium difluorophosphate. The electrolyte composition can also include additives like ethylene monofluorocarbonate and trifluoroethyl methyl carbonate. The anode materials enable power cell operation at high temperatures while maintaining capacity stability during cycling.

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Electrolyte for lithium-ion batteries with improved cycle life and performance characteristics. The electrolyte contains a lithium salt and organic solvent with a specific mass ratio, where the lithium salt accounts for 40-80% of the total electrolyte mass. This composition enables optimal lithium ion transport while maintaining sufficient solvent viscosity and conductivity. The electrolyte formulation is optimized for silicon-based anode materials, particularly for negative electrodes, and is compatible with various lithium salts. The formulation achieves superior SEI film stability and lithium ion transport properties, enabling enhanced battery performance and cycle life compared to conventional electrolyte formulations.

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Lithium-ion battery electrolyte compositions that enhance cycle life at elevated temperatures through a novel combination of solvents and electrolyte components. The compositions contain a specific solvent mixture and electrolyte containing lithium hexafluorophosphate (LiPF6) and lithium difluorophosphate (LiPO2F2), which together provide improved thermal stability and passivation properties compared to conventional electrolytes. The solvent mixture, comprising 10-50% by volume of linear carbonates and 15-40% by volume of non-linear carbonates, enhances the electrolyte's thermal management capabilities while maintaining optimal ionic conductivity. The electrolyte composition enables operation at temperatures up to 85°C without compromising cell performance, while maintaining the benefits of conventional electrolytes.

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Lithium iron phosphate battery for electric vehicles with enhanced low-temperature performance and cycle life. The battery features a positive electrode with a high compaction density of 2.3-2.7 g/cm^3, optimized current collector and electrode structure, and a specially formulated electrolyte. This architecture addresses the challenges of lithium iron phosphate battery performance at low temperatures by improving ion diffusion rates and charge transfer resistance through optimized electrode and electrolyte design.

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Lithium-ion battery electrolyte that improves performance in high-temperature applications by combining a high-concentration lithium salt with a specially designed ionic liquid. The electrolyte comprises lithium salts and an ionic liquid with unique properties, such as enhanced conductivity and improved wettability, which enable high-temperature operation while maintaining safety. The electrolyte is formulated to address common challenges in lithium-ion battery electrolyte development, including poor viscosity and wettability issues.

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Electrolyte for lithium-ion batteries that addresses volume expansion issues in silicon-based anodes. The electrolyte comprises a mixed solvent containing lithium salt and fluorine-containing additive, prepared under inert gas conditions. The electrolyte is formulated by mixing the solvent with lithium salt and fluorine-containing additive, followed by uniform mixing. This preparation method enables the development of an electrolyte that can effectively manage the high expansion rates of silicon anode materials while maintaining electrical performance.

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A low-concentration lithium-ion battery electrolyte that enables stable cathode interface (CEI) and solid electrolyte interphase (SEI) formation on both positive and negative electrodes, while maintaining low viscosity and excellent wettability. The electrolyte comprises a lithium salt and an organic solvent system with a chain carboxylate-based solvent and fluorinated carboxylate-based solvent. The solvent composition is optimized to achieve a concentration of lithium salt between 0.01 and 0.5 mol/L, which significantly reduces the formation of transition metal ions in the electrolyte during charging and discharging. This results in improved battery performance, reduced capacity decay, and enhanced cycle life compared to conventional high-concentration lithium-ion battery electrolytes.

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An electrolyte containing a phosphorus compound, its preparation method, and a lithium secondary battery, and belongs to the technical field of lithium secondary batteries. The electrolyte contains a phosphorus compound, and its preparation method and the technical field of lithium secondary batteries, and belongs to the technical field of lithium secondary batteries.

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Lithium-ion battery electrolyte with enhanced safety and thermal stability through the introduction of a novel LiPFSI-based ionic liquid electrolyte. The electrolyte combines LiPFSI with a mixed ionic liquid and organic solvent, with specific additives tailored to improve its performance characteristics. The electrolyte achieves enhanced flame retardancy, thermal stability, and electrochemical stability, enabling safer operation in high-power applications while maintaining cycle life.

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A multifunctional additive for lithium-ion battery electrolytes that combines the benefits of a single film-forming compound with improved high-temperature and voltage stability. The additive, comprising a compound with a benzene ring containing a sulfonic acid group and a polycyclic structure, forms a stable film on the positive electrode surface when chlorine gas is passed through the electrolyte. This compound exhibits enhanced performance under both high and low voltage conditions, with superior cycle stability across the full voltage range. Its unique combination of film-forming properties and chemical stability enables the additive to achieve reliable operation in both warm and cold operating conditions.

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Nonaqueous electrolyte solution containing a specific compound in a specific amount, and a nonaqueous electrolyte battery including the nonaqueous electrolyte solution, which contains a specific compound in a specific amount, particularly for lithium secondary batteries. The solution contains a cyclic carbonate with an unsaturated carbon-carbon bond and at least one compound selected from the group consisting of compounds represented by the below-described Formula (A), a cyclic carbonate having an unsaturated carbon-carbon bond, and at least one compound selected from the group consisting of compounds represented by the below-described Formula (B) or (C), and in which the amounts of these compounds are suitably adjusted, thereby arriving at the present invention.

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Electrolyte for lithium-ion batteries that improves gas reduction, safety, and thermal stability through optimized lithium carbonate (Li2CO3) particle size and surface area. The electrolyte contains lithium salt, solvent, organic additives, and specific Li2CO3 content, achieving enhanced gas management and thermal performance compared to conventional electrolytes. The Li2CO3 component enables controlled decomposition and dissolution during charging, while the optimized particle size and surface area ensure effective dispersion and uniform distribution of the electrolyte components.

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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 maintains high discharge capacity even at extreme temperatures. The electrolyte comprises a non-aqueous organic solvent, lithium salt, and additives, with specific weight percentages of vinyl sulfite, fluoroethylene carbonate, and lithium difluorophosphate. This composition enables reliable operation at temperatures down to -32C while maintaining discharge capacity. The electrolyte's unique composition ensures consistent performance across a wide temperature range, particularly beneficial for flexible battery applications where thermal management is critical.

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Lithium-ion battery electrolyte for use in lithium-ion batteries, particularly for electronic devices and electric vehicles, that combines high boiling-point solvents with enhanced ionic conductivity. The electrolyte comprises a non-aqueous solvent containing a mixed solvent of cyclic carbonate and cyclic ester, with a total solvent content of 85% or more. The solvent composition enables improved ionic conductivity compared to conventional solvents, while maintaining safety through reduced volatilization. The battery design incorporates a graphite-based negative electrode with a low degree of graphitization, optimized for charge/discharge performance across a wide temperature range.

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A high-voltage electrolyte for lithium titanate anode materials in lithium-ion batteries that enhances cycle life through improved electrolyte performance. The electrolyte combines an ionic liquid with conventional electrolyte, enabling enhanced stability and conductivity at elevated voltages. This hybrid electrolyte configuration addresses the conventional electrolyte's limitations in high-voltage applications while maintaining the benefits of lithium titanate's zero-strain properties.

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Lithium-ion battery electrolyte and lithium-ion battery technology that addresses the performance challenges of high-voltage and high-silver systems. The electrolyte combines a non-aqueous organic solvent with a lithium salt and additives, featuring a specific formulation that enhances thermal stability, internal resistance management, and gas management during high-temperature operation. This electrolyte enables improved cycle life, reduced internal resistance variations, and controlled electrolyte decomposition rates, making it suitable for high-voltage lithium-ion batteries.

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All-inorganic electrolyte system for lithium-ion batteries that replaces organic solvents with inorganic compounds like phosphoranimines, phosphazenes, and monomeric phosphorus compounds. The inorganic electrolyte has benefits like reduced flammability, improved thermal stability, and lower vapor pressure compared to organic electrolytes. It also forms a stable solid electrolyte interface layer on battery electrodes. The inorganic electrolyte composition can have a melting point below 0°C and vapor pressure low enough to prevent combustion at normal operating temperatures. The inorganic electrolyte can contain less than 2% organic compounds.

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High-performance lithium metal battery electrolyte containing an anion acceptor additives that addresses the safety and performance challenges of lithium metal batteries. The electrolyte combines high-concentration lithium metal anodes with anion acceptor additives to create a uniform solid-liquid interface film. The anion acceptor improves interface stability, while the additives enhance interface uniformity and safety. The electrolyte achieves high lithium ion conductivity through the introduction of non-flammable hydrofluoroether as a diluent. This local concentration approach enables efficient lithium ion transport while maintaining safety performance.

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High-voltage lithium-ion battery electrolyte for 4.4V and above lithium-ion batteries that addresses compatibility issues between the electrode and electrolyte interfaces, enhances thermal stability during long-term storage, and maintains excellent cycle performance.

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Non-aqueous electrolyte solution for lithium secondary batteries that suppresses gas generation and maintains high-temperature stability. The solution contains a combination of propylene carbonate and ethylene carbonate in a ratio of 2:8 to 4:6. This blend enhances the electrolyte's thermal resistance and prevents excessive gas evolution during high-voltage operation. The solution also maintains the battery's structural integrity through controlled metal dissolution and passivation, ensuring consistent performance across charge/discharge cycles and high-temperature conditions.

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Manufacturing high-performance lithium-ion batteries through a novel electrode preparation process that enhances energy density and cycle life. The method involves coating high-voltage lithium sulphate cathode slurry on aluminum foil, followed by embedding silicon-based materials within a microporous aluminum foil negative electrode. The cathode and negative electrode are combined with a mixed lithium salt electrolyte containing primary and secondary lithium salts, which combines the benefits of lithium hexafluorophosphate with lithium tetrafluoroborate and other secondary lithium salts. This multi-component electrolyte solution provides superior performance characteristics compared to conventional lithium hexafluorophosphate electrolytes, enabling higher specific energy density and longer battery life.

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Electrolyte for lithium secondary batteries that maintains excellent safety, capacity, and lifespan characteristics even under high voltage conditions. The electrolyte contains a lithium salt and a fluorine-substituted acetate-based compound, with the fluorine-substituted acetate compound at 5-15 parts by weight of the organic solvent. This composition enables the electrolyte to maintain its integrity and prevent electrolyte decomposition even at elevated temperatures and voltages. The electrolyte provides superior performance characteristics compared to conventional lithium electrolytes used in high-voltage lithium-ion batteries.

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Electrolyte for lithium-ion batteries with improved thermal stability and mechanical properties, achieved through the use of a specific fluorinated chain ester compound. The electrolyte contains a compound represented by the general formula (1), which contains a fluorinated chain ester with a linear alkyl group having a fluorine atom. The compound (1) provides enhanced thermal stability and mechanical strength to the electrolyte solution, enabling higher operating temperatures and reduced thermal degradation compared to conventional electrolytes.

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A lithium-ion battery electrolyte that enhances charge and discharge efficiency through a novel SEI (solid electrolyte interphase) film. The electrolyte comprises a lithium salt, a carbonate-based organic solvent, and lithium salts. The carbonate component is specifically selected to form a dense and stable SEI film that protects the negative electrode during both low and high temperature charging/discharging cycles. This film prevents lithium migration and deposition issues that compromise battery performance, while maintaining high capacity retention and cycle life.

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A liquid electrolyte for lithium metal batteries that enables high-rate discharge capabilities while maintaining long cycle life. The electrolyte contains a fluorinated benzene framework, which provides excellent thermal stability and conductivity. The fluorinated benzene backbone is reinforced with fluorinated carboxylic acid esters and siloxane compounds, creating a robust solid electrolyte interface film (SEI) that prevents lithium dendrite formation during high-rate charging. This electrolyte enables high-rate discharge capabilities while maintaining excellent cycle life, making it suitable for lithium metal batteries that require high-rate charge/discharge cycles.

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A high-safety electrolyte for lithium-ion batteries that enables stable operation at elevated voltages. The electrolyte combines lithium salt with anionic additives that form a stable interface film on both electrodes, preventing decomposition of solvents and maintaining high coulombic efficiency. The electrolyte's unique composition and structure enable operation at voltages up to 5V, while maintaining excellent thermal stability and cycle life. The electrolyte system combines flame-retardant properties of anionic additives with the common flame-retardant properties of lithium salt, making it suitable for high-temperature applications.

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Silicon-based lithium-ion battery with enhanced performance through a novel electrolyte system. The battery achieves high energy density, long cycle life, and excellent rate characteristics by utilizing a high-concentration lithium salt electrolyte with a specific solvent composition. This electrolyte formulation enables the formation of a dense, stable SEI layer on the silicon anode surface, which prevents repeated SEI film formation and degradation during charging and discharging cycles. The solvent composition also improves electrolyte viscosity and activity, while maintaining sufficient mobility of lithium ions. The battery's unique electrolyte system enables superior thermal stability, resistance to moisture sensitivity, and environmental performance compared to conventional lithium-ion batteries.

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Lithium-ion battery electrolyte for wide temperature discharge, comprising lithium bisoxalate borate (LiBOB), lithium tetrafluoroborate (LiPF6), and lithium beryllium trioxide (LiBETI) in a mass ratio of 1:3:2, with additives such as organic solvents and silicon compounds. The electrolyte provides stable, dense, and tough SEI film formation, while maintaining high discharge performance across a wide temperature range of -55°C to 95°C.

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A lithium-ion battery electrolyte additive that enhances cycle performance and thermal stability by controlling surface activity. The additive selectively adsorbs transition metal ions on the positive electrode surface, preventing unwanted side reactions while maintaining sufficient lithium ion circulation. This selective surface modification enables improved cycle retention at high voltage and temperature conditions, while minimizing gas production and expansion. The additive's surface activity is precisely controlled to balance these competing factors, resulting in enhanced battery performance.

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A lithium-ion battery electrolyte for high-voltage, wide-temperature applications that enhances both circulation life and high-temperature performance. The electrolyte comprises an organic solvent with specific ratios of cyclic carbonate ester, fluorine-containing solvent, and carbonate ester, along with lithium salt and a 3-fluorine-1,3-propene sulfonate additive. The additive, 3-fluorine-1,3-propene sulfonate, is incorporated at a concentration of 6 wt% in the solvent. This composition maintains the electrolyte's stability while preventing premature decomposition at elevated voltages.

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Electrolyte for lithium-ion batteries that enhances stability and performance through a specific composition of non-aqueous solvent and lithium salt. The electrolyte contains 1-60% cyclic carbonate and 40-99% linear solvent, providing a balance between oxidation stability and ion transport characteristics. This composition enables the electrolyte to maintain its integrity even when operating at higher voltages, while maintaining sufficient ion conductivity to support battery performance.

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Electrolyte for lithium-ion batteries that enhances performance at both high and low temperatures while maintaining stability against nickel degradation. The electrolyte contains a lithium salt, propylene carbonate, and lithium carbonate, with the lithium carbonate content optimized to balance capacity retention, cycle life, and oxidation stability. The electrolyte's unique composition enables excellent performance in both high-temperature applications and low-temperature environments, particularly for nickel-based electrodes.

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A lithium secondary battery electrolyte that enhances battery performance by controlling cyclic carbonate content in the non-aqueous solvent. The electrolyte contains a controlled proportion of cyclic carbonate (1-30 wt%) alongside a linear solvent, which prevents rapid degradation of the negative electrode interface during charging and discharging. This composition enables improved battery lifespan compared to conventional electrolytes containing high levels of cyclic carbonate.

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Non-aqueous electrolyte secondary battery with enhanced durability through optimized electrode materials and electrolyte composition. The battery comprises a positive electrode containing a lithium transition metal oxide with cobalt content less than 20% by mass, a negative electrode containing silicon, and a fluorinated chain carboxylic acid ester-based non-aqueous electrolyte. The positive electrode active material provides high cycle life, while the silicon content in the negative electrode enhances the battery's overall durability. The electrolyte maintains its performance characteristics over multiple charge/discharge cycles.

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