Improving Electrolyte Efficiency in EV Battery Systems

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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