Electrolyte of lithium ion battery
A lithium-ion battery, electrolyte technology, applied in secondary batteries, organic electrolytes, non-aqueous electrolytes, etc., can solve problems such as inability to solve compatibility, inability to exert gram capacity, and inability to solve problems such as increasing nickel content in positive electrodes
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Embodiment 1
[0033] Lithium salt uses: LiPF 6 , the organic solvent adopts: ethylene carbonate (EC) / methyl ethyl carbonate (EMC) / diethyl carbonate (DEC) obtains solvent according to the mixed solvent of mass ratio 25 / 25 / 50, dissolves lithium salt in organic solvent, where LiPF 6 The concentration is 1.0mol / L. 1% of the total mass of vinylene carbonate (VC) was added, and 0.2% of the total mass of dithiodinitrile was added. The electrolyte solution of Example 1 was obtained. That is, R1 in the additive CNR1SSR2CN in the first embodiment is 0; R2 is 0, and the molecular formula is CNSSCN.
Embodiment 2
[0035] The electrolyte solution was prepared and the battery was tested according to the same method as in Example 1, except that 1% of the total mass of dithiomethyldinitrile was added to obtain the electrolyte solution of Example 2. That is, in Example 2, R1 is 1; R2 is 0. The molecular formula is CNCH 3 SSCN, obtains the electrolytic solution of embodiment 2.
Embodiment 3
[0037] The electrolyte solution was prepared and the battery was tested according to the same method as in Example 1, except that 1% of the total mass of dithiodimethyldinitrile was added to obtain the electrolyte solution of Example 3. That is, in Example 3, R1 is 1; R2 is 1. The molecular formula is CNCH 3 SSCH 3 CN.
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