Lithium ion battery electrolyte and lithium ion battery
A lithium-ion battery and electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., can solve problems such as thermal runaway and poor safety performance
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Embodiment 1
[0105] (1) Preparation of electrolyte:
[0106] The electrolyte solution was prepared in a glove box, the moisture in the glove box was controlled at ≤1ppm, and the temperature was 25°C. 250g ethylene carbonate (EC), 450g ethyl methyl carbonate (EMC), 150g diethyl carbonate (DEC) were uniformly mixed to make a mixed solvent, and 130g lithium hexafluorophosphate (LiPF 6 ), so that the concentration of the lithium salt is 1mol / L, then 51g of perfluoropolyether ethanol is added thereto, its chemical structural formula is compound 1, the weight average molecular weight is 2130, and a in compound 1 is 30 on average.
[0107] (2) Preparation of battery:
[0108] Mix 100 parts of graphite material, 1 part of conductive agent super-p, 1.5 parts of thickener sodium carboxymethylcellulose (CMC) and 2.5 parts of styrene-butadiene rubber (SBR) binder into a uniform paste , evenly coated on the copper foil as the negative electrode collector, and dried under vacuum at 80°C for 24h to obt...
Embodiment 2
[0111] The battery was prepared in the same manner as in Example 1, except that the additive in the electrolyte was 51 g of perfluoropolyether formamide, its chemical structural formula was Compound 2, the weight average molecular weight was 2400, and the average value of a in Compound 2 was 19 , to prepare battery S2.
Embodiment 3
[0113] The battery was prepared in the same manner as in Example 1, except that the additive in the electrolyte was 51 g of perfluoropolyether acyl fluoride, its chemical structural formula was Compound 3, the weight average molecular weight was 3300, and the average value of a in Compound 3 was 18 , to prepare battery S3.
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