22 patents in this list

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Electric vehicles (EVs) demand batteries that perform reliably under various conditions, and fluorinated electrolytes are key to this goal. These electrolytes help stabilize the battery's internal environment, allowing for efficient ion movement and reducing degradation over time. As EVs become more prevalent, addressing these stability and longevity issues is crucial for industry growth and consumer trust.

Challenges arise from the complex chemistry involved in maintaining a stable electrolyte composition. Variations in temperature, charging cycles, and material interactions can lead to unwanted reactions, impacting battery life and safety. Professionals must navigate these complexities to ensure batteries remain efficient and durable.

This page compiles research on electrolyte compositions, showcasing solutions like fluorinated ether compounds and specific solvent mixtures. These approaches enhance battery performance by improving voltage stability and extending life cycles, offering practical strategies for overcoming current limitations in EV battery technology.

1. Electrolyte Composition with Fluorinated Ether Compounds for Lithium-Ion Batteries

XIANGHE KUNLUN NEW ENERGY MAT CO LTD, XIANGHE KUNLUN NEW ENERGY MATERIAL CO LTD, 2022

Electrolyte for lithium-ion batteries containing fluorinated ether compounds to improve battery performance and safety. The fluorinated ether electrolyte helps prevent dendrite formation in lithium-ion batteries, which can improve battery life and reduce the risk of short circuits. The fluorinated ether compounds have 7 or fewer carbon atoms. The battery containing this electrolyte has improved charge-discharge cycling, higher temperature range, and reduced dendrite growth compared to traditional carbonate-based electrolytes.

2. Electrolyte Composition with Lithium Bis(fluorooxalato) Borate, Tripropargyl Phosphate, and 3-Fluoro-1,3-Propanesultone Additives

EVE ENERGY CO LTD, 2022

Electrolyte composition for lithium-ion batteries that improves cycle life and storage stability at high temperatures. The electrolyte contains specific additives like lithium bis(fluorooxalato) borate, tripropargyl phosphate, and 3-fluoro-1,3-propanesultone in addition to the lithium salt and organic solvent. This composition enhances the electrode-electrolyte interface reactions to reduce impurity formation, improve SEI film stability, and mitigate carbon corrosion at high temperatures. It also removes impurities from the electrolyte to prevent salt decomposition.

3. Electrolyte Comprising Fluoroalkyl Borate Compounds for High-Voltage Lithium-Ion Batteries

XIANG RIVER KUNLUN NEW ENERGY MAT CO LTD, XIANG RIVER KUNLUN NEW ENERGY MATERIAL CO LTD, 2022

Electrolyte containing fluoroalkyl borate compounds and battery with improved stability and cycling performance at high voltages, particularly above 4.3V. The electrolyte contains fluoroalkyl borate compounds like tetrafluoroethyl borate (B(OCHF2)4) to improve stability and reduce dendrite formation in lithium-ion batteries. The fluoroalkyl borate electrolyte enables higher voltage operation without degradation, and improves cycle life and safety compared to conventional electrolytes. The battery using this electrolyte can deliver better performance at high voltages for applications like electric vehicles.

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4. Electrolyte Comprising Fluorinated Phenyl Carbonates for Lithium-Ion Batteries

XIANG RIVER KUNLUN NEW ENERGY MAT CO LTD, XIANG RIVER KUNLUN NEW ENERGY MATERIAL CO LTD, 2022

Fluorobenzene carbonate-containing electrolyte for lithium-ion batteries that improves cycling stability and inhibits lithium dendrite formation. The electrolyte contains fluorinated phenyl carbonates like 1,1,1,2,2-pentafluoroethyl phenyl carbonate (FESC) as the primary solvent. The fluorinated carbonate provides better high temperature stability, high voltage stability, and cycling stability compared to conventional carbonates like ethylene carbonate. This reduces dendrite growth and improves cycle life for batteries operating at high temperatures.

5. Electrolyte Compositions with Fluorinated Cyclic Carbonate Cosolvent for Lithium-Ion Batteries

GM GLOBAL TECH OPERATIONS LLC, GM GLOBAL TECHNOLOGY OPERATIONS LLC, 2021

Electrolyte compositions for lithium-ion batteries with improved low-temperature charging performance. The compositions contain a lithium salt, a non-aqueous solvent, and a fluorinated cosolvent. The fluorinated cosolvent is a cyclic carbonate with a cyclic ring and fluorine atoms attached directly or indirectly to the ring. This reduces the energy required to dissolve lithium ions from the electrolyte at low temperatures, improving charging at cold temperatures.

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6. Electrolyte Composition with Specific Solvent and Additive Mixture for Lithium-Ion Batteries

RENAULT SAS, 2021

Electrolyte composition for lithium-ion batteries with cathodes rich in lithium and graphite anodes that improves cycling life and reduces capacity fade. The electrolyte contains lithium hexafluorophosphate, ethylene carbonate, methyl/ethyl carbonate, dimethyl carbonate, diethyl carbonate, fluoroethylene carbonate, and lithium difluoro (oxolato) borate. The specific combination of solvents and additives enables formation of a stable and low-insulation SEI layer on the graphite anode during cycling.

7. Fluorine-Containing Electrolyte with Specific Solvent Ratios and Lithium Difluorooxalato Borate Additive for High-Voltage Lithium-Ion Batteries

CHINA UNIVERSITY OF PETROLEUM BEIJING, UNIV CHINA PETROLEUM BEIJING, 2021

Fluorine-containing 5.5V high-voltage lithium-ion battery electrolyte with improved oxidation stability for use in batteries with cathode materials like LiNi0.5Mn1.5O4 that operate above 5V. The electrolyte contains fluoroethylene carbonate (FEC), propylene carbonate (PC), and dimethyl carbonate (DMC) solvents in specific ratios, along with lithium salt and an additive of lithium difluorooxalato borate. The electrolyte composition improves high-voltage oxidation stability compared to conventional carbonate electrolytes.

8. Electrolyte Solution with 1-Fluoroethyl Methyl Carbonate Additive for Lithium Secondary Batteries

HYUNDAI MOTOR CO, HYUNDAI MOTOR CO LTD, IAC IN NAT UNIV CHUNGNAM, 2021

Electrolyte solution for lithium secondary batteries that improves battery life and performance. The electrolyte contains a lithium salt, solvent, and a functional additive called 1-fluoroethyl methyl carbonate (FEMC). The FEMC additive improves battery life and performance when used in lithium secondary batteries, particularly in high voltage applications. It forms a protective layer on the electrodes that reduces degradation during cycling.

9. Lithium-Ion Battery with Fluorinated Acyclic Ester and Carbonate Nonaqueous Electrolyte

DU PONT, E I DU PONT DE NEMOURS AND CO, 2020

Lithium-ion battery with a nonaqueous electrolyte composition containing fluorinated acyclic carboxylic esters and/or fluorinated acyclic carbonates to improve cycling performance of high voltage cathodes like spinels. The fluorinated solvents provide better electrolyte stability and SEI formation on high voltage cathodes like spinels compared to conventional carbonate-based electrolytes. The composition with fluorinated solvents enables better cycling of high voltage spinel cathodes at high temperatures. The battery has a housing, anode, cathode, separator, and the nonaqueous electrolyte.

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10. Rechargeable Lithium Battery with Fluorinated Electrolyte and LiCoMnO4 Cathode for High-Voltage Stability

UNIVERSITY OF MARYLAND COLLEGE PARK, 2020

High-energy density rechargeable lithium batteries with cells over 5V that can be cycled over 100 times while retaining at least 90% capacity. The batteries use a fluorinated electrolyte containing a fluoride salt and an additive like lithium difluoro(oxalate)borate. This allows stable operation above 5V compared to conventional electrolytes. The high voltage cathode is LiCoMnO4 synthesized using a specific method. The anode can be lithium metal or graphite.

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11. Electrolyte Solution with Fluorinated Cyclic Carbonate and Chain Ester for Silicon-Based Anodes

TOYOTA IND CORP, TOYOTA INDUSTRIES CORP, 2020

Electrolyte solution for lithium-ion batteries that improves capacity retention in batteries using silicon-based anodes. The electrolyte contains a fluorinated cyclic carbonate like fluoroethylene carbonate (FEC) and a fluorinated chain ester like trifluoromethylcyclohexanecarboxylate (TFCHC). The fluorinated compounds help stabilize the LiF formation at the silicon anode interface, reducing capacity fade over cycling. The FEC provides a suitable solvent for LiPF6 and LiBFx, while the TFCHC reduces electron density on the FEC oxygen, stabilizing the LiF complex.

12. Electrolyte Additives Comprising Fluorinated Cyclic Compounds for Silicon Anode Stabilization in Lithium-Ion Batteries

ENEVATE CORP, 2019

Electrolyte additives and electrolytes for lithium-ion batteries with silicon anodes that improve cycle life, reduce swelling, and enhance safety. The electrolyte additives are fluorinated cyclic compounds like fluoroethylene carbonate (FEC) that stabilize the solid-electrolyte interface, prevent Si expansion, and reduce electrolyte reactions compared to conventional electrolytes. The additives also have flame resistance and thermal stability benefits. The electrolyte can contain FEC as the sole solvent or in combination with other solvents like ethyl methyl carbonate (EMC). The additives can improve cycling stability and reduce swelling of Si anodes in high-voltage cathodes like Ni-rich NCM or LCO compared to conventional electrolytes.

13. Battery with Non-Aqueous Electrolyte Containing Fluorinated Cyclic Carbonate Solvent and Lithium Tetrafluoro Oxalate Phosphate

Lithium Energy and Power GmbH & Co. KG, 2019

A storage element like a battery with reduced swelling compared to conventional batteries. The battery uses a specific composition of non-aqueous electrolyte containing a fluorinated cyclic carbonate solvent with a concentration range of 5-40% by volume. This composition suppresses swelling compared to conventional electrolytes with lower fluorinated cyclic carbonate content. The electrolyte also contains lithium tetrafluoro oxalate phosphate.

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14. Electrolyte Composition with Fluorocarbon and Fluoroester Compounds for Lithium Secondary Batteries

Richem Co., Ltd., Chungnam National University Industry-Academic Cooperation Foundation, 2019

Flame retardant or nonflammable electrolyte for lithium secondary batteries to improve stability and safety at high voltages. The electrolyte contains specific compounds like fluorocarbons and fluoroesters that are less flammable than conventional carbonate electrolytes. The compounds are mixed in specific ratios to provide optimal stability and capacity retention. The flame retardant electrolyte allows higher charge voltages without degradation and reduces the risk of thermal runaway.

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15. Electrolyte Composition with Non-Fluorinated Cyclic Carbonate, Fluorinated Solvent, Lithium Glycolato Borate, and Fluorinated Carbonate

SYENSQO SA, 2019

Electrolyte composition for lithium-ion batteries that improves cycling performance at high temperatures. The electrolyte contains a mixture of non-fluorinated cyclic carbonate and a fluorinated solvent, along with a lithium glycolato borate additive and fluorinated carbonate. The fluorinated solvent improves cycling stability at high temperatures compared to non-fluorinated solvents. The lithium glycolato borate and fluorinated carbonate further enhance cycling performance. The electrolyte composition is suitable for high-temperature lithium-ion batteries like those used in electric vehicles.

16. Nonaqueous Electrolyte Comprising Fluorinated Carboxylate Ester and Cyclic Carbonate Solvent

DAIKIN INDUSTRIES LTD, TOYOTA JIDOSHA KABUSHIKI KAISHA, 2018

Nonaqueous electrolyte for lithium-ion batteries that provides high conductivity and oxidation resistance. The electrolyte contains a unique combination of a fluorinated carboxylate ester with two fluorine atoms on the alpha carbon and a cyclic carbonate as the solvent. This combination improves electrolyte performance compared to using just one of these components alone. The electrolyte can further include additives like lithium difluorooxalateborate and fluoroethylene carbonate.

17. Non-Aqueous Electrolyte Solution with Fluoroethylene Carbonate and Pyrimidine Compound for Lithium Batteries

LG ENERGY SOLUTION LTD, 2017

A non-aqueous electrolyte solution for lithium batteries that improves cycle life, high temperature performance, and rate capability. The electrolyte contains fluoroethylene carbonate (FEC) and a pyrimidine compound. The FEC concentration is 0.1-50 vol % based on the total solvent volume. This composition provides a stable SEI layer on the anode during cycling, reducing capacity fade. The pyrimidine compound helps prevent moisture and HF buildup in the electrolyte. The optimized electrolyte composition improves battery performance at high temperatures and during fast charging/discharging.

18. Electrolyte Composition with Lithium Bis(malonato) Borate and Fluorinated Components for Lithium-Ion Batteries

SYENSQO SA, 2016

Electrolyte composition for lithium-ion batteries with improved cycle life at high temperatures. The electrolyte contains a non-fluorinated cyclic carbonate, a fluorinated solvent, a lithium bis(malonato) borate additive, a fluorinated cyclic carbonate, and a conventional electrolyte salt. The additive improves cycle life when used with fluorinated solvent and carbonate compared to just fluorinated solvents. The additive is a lithium bis(malonato) borate. The electrolyte composition can have up to 5% of the additive and 5% of the fluorinated carbonate. The non-fluorinated carbonate is 0.5-5% and the fluorinated solvent is 0.5-5%.

19. Electrolyte Composition with Fluorinated and Non-Fluorinated Solvents and Fluoroalkyl-Substituted Lithium Salt

UNITED STATES DEPARTMENT OF ENERGY, 2013

Electrolyte for lithium-ion batteries that has improved safety, cycle life, and temperature stability compared to conventional carbonate-based electrolytes. The electrolyte contains a fluorinated solvent like HFE-7100, a non-fluorinated solvent like ethylene carbonate, and a salt like fluoroalkyl-substituted LiPF6 or LiBF4. The fluorinated solvent reduces flammability, the non-fluorinated solvent improves stability, and the salt allows the electrolyte to remain a single phase over a wide temperature range. This enables safer, longer-lasting batteries for applications like electric vehicles and electronics.

20. Lithium Ion Battery with Electrolyte Solution Comprising Chain Fluorinated Ester and Ether Compounds and Planar Laminated Negative Electrode Structure

NEC CORP, 2012

Lithium ion battery with improved cycle life, capacity retention, and resistance stability, particularly at high temperatures. The battery uses an electrolyte solution containing both chain fluorinated ester and chain fluorinated ether compounds. This combination suppresses gas generation, volume expansion, and resistance increases compared to using just one of those compounds as the electrolyte solvent. The battery also uses a negative electrode with a planar laminated structure to prevent gas trapping between electrodes.

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