Flammability of sulfide solid-state electrolytesβ-Li_(3)PS_(4)and Li_(6)PS_(5)Cl:Volatilization and autoignition of sulfur vapor-New insight into all-solid-state battery thermal runaway  

作　　者：Thomas A.Yersak Hernando J.Gonzalez Malabet Vamakshi Yadav Nicholas P.W.Pieczonka Will Collin Mei Cai 

机构地区：[1]General Motors Battery R&D,30470 Harley Earl Blvd,Warren,MI 48092-2031,USA

出　　处：《Journal of Energy Chemistry》2025年第3期651-660,共10页能源化学(英文版)

摘　　要：This study shows that sulfide solid-state electrolytes,β-Li_(3)PS_(4)and Li_(6)PS_(5)Cl,are flammable solids.Both solid-state electrolytes release sulfur vapor in a dry,oxidizing environment at elevated temperature<300℃.Sulfur vapor is a highly flammable gas,which then auto-ignites to produce a flame.This behavior suggests that an O_(2)-S gas-gas reaction mechanism may contribute to all-solid-state battery thermal runaway.To improve all-solid-state battery safety,current work focuses on eliminating the O_(2)source by changing the cathode active material.The conclusion of this study suggests that all-solidstate battery safety can also be realized by the development of solid-state electrolytes with less susceptibility to sulfur volatilization.

关 键 词：SULFIDE Solid-state electrolyte FLAMMABILITY ALL-SOLID-STATE Battery Thermal runaway 

分 类 号：TM912[电气工程—电力电子与电力传动]