Electrolyte for expanding application temperature of lithium-ion battery and lithium-ion battery
A lithium-ion battery and electrolyte technology, which is applied to secondary batteries, secondary battery repair/maintenance, circuits, etc. The effect of dissolution and improvement of interface properties
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[0012] Specific embodiment 1: This embodiment describes an electrolyte that broadens the use temperature of lithium-ion batteries, including organic solvents, additives and lithium salts. The additives include additives Y and A; the additives A are LiF, LiCl , Lithium difluorooxalate borate, lithium bisoxalate borate, lithium difluorophosphate, lithium tetrafluorooxalate phosphate and lithium difluorobisoxalate phosphate or a mixture of several, the amount of which accounts for 0.1% of the total mass of the electrolyte. 20%; the structural formula of the additive Y is shown in I:
[0013]
[0014] Where R 1 , R 2 Each independently is C 1~6 Alkyl, alkoxy, substituted C 1~6 Any one of alkyl or substituted alkoxy, specifically, substituted C 1~6 Alkyl or substituted alkoxy refers to C 1~6 A group in which the hydrogen on an alkyl group or an alkoxy group is replaced by another element.
Example Embodiment
[0015] Embodiment 2: In the electrolyte solution for broadening the use temperature of a lithium ion battery described in Embodiment 1, the additive Y is preferably one of the following substances:
[0016]
Example Embodiment
[0017] Specific Embodiment Three: In the electrolyte solution for broadening the use temperature of a lithium ion battery described in specific embodiment 1, the amount of the additive Y accounts for 0.01% to 8% of the total weight of the electrolyte.
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