Triketone electrolyte used for silicon negative electrode lithium battery
An electrolyte and lithium battery technology, which is applied in the direction of secondary batteries, organic electrolytes, non-aqueous electrolytes, etc., can solve the problems such as the type and amount of additives that need to be carefully studied, so as to improve the battery cycle life, reduce side reactions, and reduce battery life. The effect of flatulence
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[0020] Example 1
[0021] The organic solvent is ethylene carbonate and ethyl methyl carbonate (the volume ratio of the two is 40:60); the lithium salt is LiPF6, the lithium salt concentration is 1M / L, and the film-forming additives are ethylene carbonate and cyclopentene trione. Each is 1%, the anti-overcharge additive is 2,4-difluorobiphenyl, which accounts for 1%, and the positive electrode protection additive is hexamethyldisilazane, which accounts for 0.2%.
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[0022] Example 2
[0023] The organic solvent is ethylene carbonate and ethyl methyl carbonate (the volume ratio of the two is 40:60); the lithium salt is LiPF6, the lithium salt concentration is 1M / L, and the film-forming additives are 1,3-propane sultone and Cyclopentene trione, each accounting for 1%, the anti-overcharge additive is 2,4-difluorobiphenyl, accounting for 1%, and the positive electrode protection additive is hexamethyldisilazane, accounting for 0.2% .
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[0024] Example 3
[0025] The organic solvent is ethylene carbonate and ethyl methyl carbonate (the volume ratio of the two is 40:60); the lithium salt is LiPF6, the lithium salt concentration is 1M / L, and the film-forming additives are fluoroethylene carbonate (FEC) and cyclic Pententrione, each accounted for 1%, the anti-overcharge additive was 2,4-difluorobiphenyl, which accounted for 1%, and the positive electrode protection additive was hexamethyldisilazane, which accounted for 0.2%.
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