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Article Dans Une Revue ACS Applied Materials & Interfaces Année : 2020

Will Sulfide Electrolytes be Suitable Candidates for Constructing a Stable Solid/Liquid Electrolyte Interface?

Résumé

Conversion-type batteries with electrode materials partially dissolved in a liquid electrolyte exhibit high specific capacity and excellent redox kinetics, but currently poor stability due to the shuttle effect. Using a solid-electrolyte separator to block the mass exchange between the cathode and the anode can eliminate the shuttle effect. A stable interface between the solid-electrolyte separator and the liquid electrolyte is essential for the battery performance. Here, we demonstrate that a stable interface with low interfacial resistance and limited side reactions can be formed between the sulfide solid-electrolyte β-Li(3)PS(4) and the widely used ether-based liquid electrolytes, under both reduction and oxidation conditions, due to the rapid formation of an effective protective layer of ether-solvated Li(3)PS(4) at the sulfide/liquid electrolyte interface. This discovery has inspired the design of a β-Li(3)PS(4)-coated solid-electrolyte Li(7)P(3)S(11) separator with a simultaneously high ion-conduction ability and good interfacial stability with the liquid electrolyte, so that hybrid lithium-sulfur (Li-S) batteries with this composite separator conserve a high discharge capacity of 1047 mA h g(-1) and a high second discharge plateau of 2.06 V after 150 cycles.
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Dates et versions

hal-03037741 , version 1 (18-12-2020)

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Bo Fan, Yanghai Xu, Rui Ma, Zhongkuan Luo, Fang Wang, et al.. Will Sulfide Electrolytes be Suitable Candidates for Constructing a Stable Solid/Liquid Electrolyte Interface?. ACS Applied Materials & Interfaces, 2020, 12 (47), pp.52845-52856. ⟨10.1021/acsami.0c16899⟩. ⟨hal-03037741⟩
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