Lithium-sulfur battery electrolyte with high coulombic efficiency and preparation method thereof
A lithium-sulfur battery and electrolyte technology, applied in the field of lithium-sulfur battery electrolyte, high coulombic efficiency lithium-sulfur battery electrolyte and its preparation, can solve problems such as complex preparation process and increase battery cost, and achieve improved coulombic efficiency and improved Cycle life, effect of suppressing shuttling effect
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Embodiment 1
[0029] This embodiment provides a high coulombic efficiency lithium-sulfur battery electrolyte, and its preparation method is as follows:
[0030] (a) Put lithium bis(trifluoromethylsulfonyl)imide into a glove box for sufficient drying; after sufficient drying, add ethylene glycol dimethyl ether and 1,3 dioxolane at a volume ratio of 1:1 In the mixed organic solvent of cyclic ethers, carry out sufficient stirring until completely dissolved;
[0031] (b) Add additive bis(4-nitrophenyl) carbonate (CAS number: 5070-13-3, the mass ratio of additive in the mixed solution that forms is 0.5wt%) in the mixture that step (a) obtains, fully Stir and let stand for 24 hours after the additives are completely dissolved.
Embodiment 2
[0033] This example provides an electrolyte solution for a lithium-sulfur battery with high Coulombic efficiency. The preparation process is basically the same as that in Example 1, except that the mass ratio of additives in the formed mixed solution is 1 wt%.
Embodiment 3
[0035] This embodiment provides an electrolyte solution for a lithium-sulfur battery with high Coulombic efficiency, the preparation process of which is basically the same as that in Embodiment 1, except that the mass ratio of additives in the formed mixed solution is 2 wt%.
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