Fluorine-Doped High-Performance Li_(6)PS_(5)Cl Electrolyte by Lithium Fluoride Nanoparticles for All-Solid-State Lithium-Metal Batteries

作     者：Xiaorou Cao Shijie Xu Yuzhe Zhang Xiaohu Hu Yifan Yan Yanru Wang Haoran Qian Jiakai Wang Haolong Chang Fangyi Cheng Yongan Yang Xiaorou Cao;Shijie Xu;Yuzhe Zhang;Xiaohu Hu;Yifan Yan;Yanru Wang;Haoran Qian;Jiakai Wang;Haolong Chang;Fangyi Cheng;Yongan Yang

作者机构：Institute of Molecular PlusSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300072China Haihe Laboratory of Sustainable Chemical TransformationsTianjin 300192China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)Nankai UniversityTianjin 300071China 

出 版 物：《Transactions of Tianjin University》 (天津大学学报（英文版）)

年 卷 期：2024年第30卷第3期

页      面：250-261页

核心收录：

学科分类：081704[工学-应用化学] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Key Research and Development Program of China(No.2018YFE0111600) the Haihe Laboratory of Sustainable Chemical Transformations(No.CYZC202307)for financial support 

主　　题：Sulfide solid electrolyte All-solid-state lithium batteries Li_(6)PS_(5)Cl Lithium fluoride F-doping 

摘      要：All-solid-state lithium-metal batteries(ASSLMBs)are widely considered as the ultimately advanced lithium batteries owing to their improved energy density and enhanced safety *** various solid electrolytes,sulfide solid electrolyte(SSE)Li_(6)PS_(5)Cl has garnered significant ***,its application is limited by its poor cyclability and low critical current density(CCD).In this study,we introduce a novel approach to enhance the performance of Li_(6)PS_(5)Cl by doping it with fluorine,using lithium fluoride nanoparticles(LiFs)as the doping *** F-doped electrolyte Li_(6)PS_(5)Cl-0.2LiF(nano)shows a doubled CCD,from 0.5 to 1.0 mA/cm^(2) without compromising the ionic conductivity;in fact,conductivity is enhanced from 2.82 to 3.30 mS/cm,contrary to the typical performance decline seen in conventionally doped Li_(6)PS_(5)Cl *** symmetric Li|SSE|Li cells,the lifetime of Li_(6)PS_(5)Cl-0.2LiF(nano)is 4 times longer than that of Li_(6)PS_(5)Cl,achieving 1500 h vs.371 h under a charging/discharging current density of 0.2 mA/cm^(2).In Li|SSE|LiNbO_(3)@NCM721 full cells,which are tested under a cycling rate of 0.1 C at 30℃,the lifetime of Li_(6)PS_(5)Cl-0.2LiF(nano)is four times that of Li_(6)PS_(5)Cl,reaching 100 cycles vs.26 ***,the doping of nano-LiF off ers a promising approach to developing high-performance Li_(6)PS_(5)Cl for ASSLMBs.