Details

Autor(en) / Beteiligte

• Fan, Bo
• Xu, Yanghai
• Ma, Rui
• Luo, Zhongkuan
• Wang, Fang
• Zhang, Xianghua
• Ma, Hongli
• Fan, Ping
• Xue, Bai
• Han, Weiqiang

Titel

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

Ist Teil von

• ACS applied materials & interfaces, 2020-11, Vol.12 (47), p.52845-52856

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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-Li3PS4 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 Li3PS4 at the sulfide/liquid electrolyte interface. This discovery has inspired the design of a β-Li3PS4-coated solid-electrolyte Li7P3S11 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.