电源技术2024，Vol.48Issue(8)：1619-1627,9.DOI:10.3969/j.issn.1002-087X.2024.08.026
硫化物固态电解质薄膜的室温干法制备和全固态电池性能
Preparation and all-solid-state battery performance of sulfide solid electrolyte membranes via a solvent-free approach at room temperature
摘要
Abstract
Solid-state sulfide electrolytes have high room-temperature ionic conductivities,but their poor mechanical strength makes it difficult to prepare practical electrolyte layers. Herein,the present work proposed a strategy of pre-fiberizing polymer adhesives to achieve the solvent-free preparation of sulfide electrolyte composite membranes at room temperature,thereby enhancing the performance of all-solid-state batteries. Pre-fiberized PTFE fiber powder was prepared by the demulsification of PTFE emulsion followed by drying. An ultrathin sulfide solid electrolyte composite membrane (～35μm) with high ionic conductivity (3.17 mS/cm) was successfully prepared using Li6PS5Cl electrolyte and roller pressing at room temperature. Using lithium cobalt oxide coated with lithium niobate (LCO@LNO) as the cathode material,a composite cathode membrane comprising the positive elec-trode material,electrolyte,and conductive agent was prepared via the same solvent-free process as electrolyte membranes at room temperature. An all-solid-state thin-film battery was prepared by stacking ultra-thin lithium indium alloy,electrolyte composite membrane,and cathode composite membrane,which achieves a reversible specific capacity of 134.1 mAh/g,an energy density of 188 Wh/kg,and 100 stable cycles.关键词
干法工艺/硫化物固态电解质/固态电解质薄膜/全固体电池/薄膜电池Key words
solvent-free process/sulfide solid-state electrolyte/solid electrolyte membrane/all-solid-state battery/thin-film battery分类
信息技术与安全科学引用本文复制引用
胡文,李柱,刘妍娜,肖亮..硫化物固态电解质薄膜的室温干法制备和全固态电池性能[J].电源技术,2024,48(8):1619-1627,9.基金项目
国家自然科学基金(22075219) （22075219）
