Electrolyte of flame-retarded lithium ion battery

A lithium-ion battery and electrolyte technology, applied in secondary batteries, secondary battery repair/maintenance, circuits, etc., can solve problems that restrict the large-scale development of power batteries, capacity loss, poor electrochemical stability, etc.
CN102082296BActive Publication Date: 2012-12-26SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANSHAN ADVANCED MATERIALS QUZHOU CO LTD
Publication Date
2012-12-26

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Abstract

The invention relates to the technical field of electrolyte of flame-retarded lithium ion batteries, in particular to electrolyte of a flame-retarded lithium ion battery. The electrolyte comprises a lithium salt and an organic solvent, and is characterized in that three flame-retarded additives are also added into the electrolyte, wherein the three flame-retarded additives comprise fluoro-carbonate as a first additive, fluoro-benzene as a second additive and a nitrogenous and fluoride bearing organic compound as a third additive. By adopting the technical scheme, the fluoro-carbonate FEC is added into the existing electrolyte system to increase the viscosity of the electrolyte system to a certain extent so that the flash point of the electrolyte system is reduced; the additive fluoro-benzene with comparatively stable electrochemical properties is added to increase the noninflammability of the electrolyte to a certain extent and simultaneously ensure that the viscosity of the electrolyte system is moderate; and the nitrogenous and fluoride bearing organic compound is added to increase the noninflammability of the electrolyte on the basis of guaranteeing the electrochemical properties of the electrolyte.
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Description

【Technical field】

[0001] The invention relates to the technical field of lithium-ion battery electrolytes, in particular to an electrolyte for flame-retardant lithium-ion batteries. 【Background technique】

[0002] Lithium-ion batteries emit a lot of heat when they are over-charged and discharged, short-circuited or operated at high current for a long time. These heats become a safety hazard for flammable electrolytes, which may cause catastrophic thermal breakdown and even battery explosion. Therefore, safety issues have become an important prerequisite for innovation in the lithium-ion battery market, especially in applications such as electric vehicles, which put forward higher and newer requirements for battery safety. At present, power batteries have begun to achieve commercial scale. Due to the different materials used by various manufacturers, the batteries will also have great differences. However, no matter what positive and negative electrode materials are used, th...

Claims

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