Revealing cycling and thermal safety characteristics of LiFePO_(4)solid-state lithium metal batteries under dual in-situ strategy

作     者：Yue Zhang Yuxuan Li Anqi Teng Lihua Jiang Zhuangzhuang Jia Wenxin Mei Yong Liu Shiyao Chen Zesen Wei Kaiqiang Jin Qiangling Duan Qingsong Wang Jinhua Sun 

作者机构：State Key Laboratory of Fire ScienceUniversity of Science and Technology of ChinaHefei 230026AnhuiChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学(英文版))

年 卷 期：2025年第103卷第4期

页      面：911-925页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by the Key-Area Research and Development Program of Guangdong Province(2024B1111080001) the National Natural Science Foundation of China(52204248 and 52474258) Youth Innovation Promotion Association CAS(Y201768) 

主　　题：Solid-state lithium batteries Dual in-situ strategy Li modification In/ex-situ heat production characteristics Uniform/non-uniform heating 

摘      要：Solid-state battery(SSB)with lithium metal anode(LMA)is considered as one of the most promising storage devices for the next *** simultaneously address two critical issues in lithium metal batteries:the negative impact of interfacial compatibility on the electrochemical performance and the safety risks associated with Li dendrite growth-we propose a dual in-situ strategy for fabricating ***,the excellent cycling performance and improved safety of polymer SSB under dual in-situ strategy was *** lower Li nucleation barrier of Sn leads to uniform Li deposition on the modified-Li(ModLi)/solid-state electrolyte(SSE)***-enriched layer on LMA contributes to capacity retention of 92%after 550 cycles in LiFePO_(4)*** modified layer provides outstanding dendrite suppression ability under an overcharge condition of 5.5 *** higher thermal stability of SSE than liquid electrolyte was investigated through in-situ heat and gas generation analysis,with ModLi+SSE generating only 9.9%of Li+*** cycling stability of SSB was demonstrated through in-situ cycling heat generation analysis,and lower temperature sensitivity of SSB with 31%of heat production decrease from 30 to 70℃,while LIBs show a 54%*** high-temperature stability was proved by a 92%capacity retention at 60℃after 50 ***,pouch cells with SSE of higher thermal stability and modifications on LMA achieved a higher self-heating onset temperature(Tonset)of 180℃and a lower thermal runaway maximum temperature(T_(max))of 401℃,The impacts of dual in-situ strategy for materials,interfaces,coin cells and pouch cells aid in further understanding on thermal runaway mechanism of SSB.