Lithium secondary battery electrolyte, preparation method of lithium secondary battery electrolyte as well as lithium secondary battery

A lithium secondary battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve the problems of high surface tension, poor wettability, wettability, etc., to improve electrical performance, reduce surface tension, The effect of good oxidation resistance
CN104051784AInactive Publication Date: 2014-09-17DONGUAN KAIXIN BATTERY MATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
DONGUAN KAIXIN BATTERY MATERIAL
Publication Date
2014-09-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses lithium secondary battery electrolyte, a preparation method of the lithium secondary battery electrolyte as well as a lithium secondary battery. The lithium secondary battery electrolyte comprises a non-aqueous organic solvent, electrolyte lithium salt and an additive; the non-aqueous organic solvent comprises carbonic ester and carboxylic ester; the electrolyte also comprises fluoroalkyl boric acid ester with the structural formula of (R1O)B(OR2)(OR3), wherein R1, R2 and R3 are alkyl group or alkyl group containing flourine with the number of carbon atoms being 1 to 10. Fluoroalkyl boric acid ester has favorable oxidation resistance, surface active performance and film forming performance; proper amount of fluoroalkyl boric acid ester is added into the electrolyte, and the liquid injection processing property, the circulation performance and the high-voltage-resistant performance of the lithium secondary battery are improved.
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Description

Technical field

[0001] The present invention involves the field of lithium secondary battery. More specific, the invention involves a lithium secondary battery electrolyte containing fluorine -alkamate. Background technique

[0002] Lithium -ion batteries have the advantages of high working voltage, large energy density, long circular life, low self -discharge rate, no memory effect, and small environmental pollution. They have been widely used in the electronic consumer goods market.Ideal power source.

[0003] At present, liquid lithium secondary battery electrolytes generally use ring -shaped carbonate (such as carbonate, carbonate, carbonate) and chain -shaped carbonate (such as carbonate, carbonate, ethyl carbonate) mixed solvents.Among them, the viscosity of ring -shaped carbonate is high and the surface tension is relatively large, so during the process of liquid injection, the electrolyte is not very good, especially at the low temperature or the compact density of the el...

Claims

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