Medium-salt-concentration electrolyte for lithium-sulfur battery
A lithium-sulfur battery and electrolyte technology, applied in lithium batteries, secondary batteries, non-aqueous electrolyte batteries, etc., can solve the problems of capacity decay, side reactions between lithium anode and electrolyte, self-discharge during storage, etc., to achieve the proportion of use The effect of reducing and improving the dissociation ability of lithium salt and low viscosity
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Embodiment 1
[0031] Lithium bis(trifluoromethylsulfonyl)imide, lithium bisfluorosulfonimide, tetrahydrofuran, isopropyl ether, 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoro The solution was prepared with propyl ether in a ratio of 1:3:8:2:5.
Embodiment 2
[0033] Lithium bis(trifluoromethylsulfonyl)imide, lithium bisfluorosulfonimide, tetrahydrofuran, isopropyl ether, 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoro The solution was prepared with propyl ether in a ratio of 1:3:8:2:9.
Embodiment 3
[0035] Lithium bis(trifluoromethylsulfonyl)imide, lithium bisfluorosulfonimide, tetrahydrofuran, isopropyl ether, 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoro The solution was prepared with propyl ether in a ratio of 1:3:8:2:18.
[0036] control group 1
[0037] The electrolyte of the control group was prepared by dissolving lithium bis(trifluoromethylsulfonyl)imide in a mixed solvent of ethylene glycol dimethyl ether-1,3-dioxolane with a volume ratio of 1:1. With a concentration of 1 mol / L, this electrolyte is the most widely used electrolyte in current lithium-sulfur batteries.
[0038] control group 2
[0039] A solution was prepared by bis(trifluoromethylsulfonyl)imide lithium, lithium bisfluorosulfonimide, tetrahydrofuran and isopropyl ether in a ratio of 1:3:8:2.
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