Synthesis and characterization of argyrodite solid electrolytes for all-solid-state Li-ion batteries

JOURNAL OF ALLOYS AND COMPOUNDS

卷:747

Article

Zhang, Zhixia¹  Zhang, Long¹  Liu, Yanyan¹  Yu, Chuang²  Yan, Xinlin³  Xu, Bo¹  Wang, Li-min¹ 

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Hebei, Peoples R China

[2] Delft Univ Technol, Dept Radiat Sci & Technol, Mekelweg 15, NL-2629 JB Delft, Netherlands

[3] Vienna Univ Technol, Inst Solid State Phys, Wiedner Hauptstr 8-10, A-1040 Vienna, Austria

关键词: Argyrodites;    Li6PS5Cl;    All-solid-state batteries;    Solid electrolytes;    Sulfides;   

DOI  :  10.1016/j.jallcom.2018.03.027

来源: Elsevier

【 摘 要 】

Li6PS5X (X = Cl, Br, I) argyrodites possess high ionic conductivity but with rather scattered values due to various processing conditions. In this work, Li6PS5X solid electrolytes were prepared by solid-state sintering or mechanical alloying and optimized with or without excess Li2S. Solid-state sintering prefers excess Li2S, whereas mechanical alloying prefers stoichiometric Li2S to synthesize high-purity samples with high ionic conductivity. Solid-state sintering is also more suitable than mechanical milling for high ionic conductivity. Li6PS5Cl with the highest ionic conductivity among Li6PS5X was comprehensively characterized for electrochemical performance and air stability. MoS2/Li6PS5Cl all-solid-state batteries assembled with Li6PS5Cl-coated MoS2 as cathode and with Li6PS5Cl as solid electrolyte demonstrate high capacity and good cycling stability. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

Free