Lithium-sulfur battery electrolyte containing multifunctional additive and application thereof
A lithium-sulfur battery and electrolyte technology, applied in the field of high specific energy secondary batteries, can solve the problems of polysulfide instability in the multi-electron conversion mechanism, and achieve the effects of avoiding rapid consumption, reducing loss, and changing deposition morphology
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[0031] Electrolyte configuration: in a glove box filled with argon (O 2 , H 2 O content <0.1ppm), ethylene glycol dimethyl ether (DME), 1,3-dioxane (DOL), diethylene glycol dimethyl ether (G2), triethylene glycol dimethyl ether ( G3), tetraethylene glycol dimethyl ether (G4), tetrahydrofuran (THF), dimethyl sulfoxide (DMSO), dimethyl trisulfide (DMTS) in a mixture of two or more as an organic solvent . Add 0.1-5% of the total mass of the electrolyte as an auxiliary additive, add 5-80% of the total volume of the electrolyte as a multifunctional additive, add lithium salt, and make the concentration of the lithium salt in the electrolyte 1.0mol / L (M), Stir well and evenly to obtain the lithium-sulfur battery electrolyte.
[0032] In an argon atmosphere, a metal lithium sheet was used as the negative electrode, a polypropylene microporous membrane of model Celgard 2400 was used as the separator, and the electrolyte dosage was 15 μL / mg S, and a CR2025 lithium-sulfur battery was...
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