ZIF-8-functionalized polymer electrolyte with enhanced performance for high-temperature solid-state lithium metal batteries  

作　　者：Jin-Fang Zhang Yuan-Yuan Wang Xiao-Feng Li Gen-Yan Zhang Ying Li Rong Liu Sheng-Liang Hu Tuo-Ping Hu Ruth Knibbe Qing-Bing Xia 

机构地区：[1]School of Materials Science and Engineering,North University of China,Taiyuan,030051,China [2]School of Energy and Power Engineering,North University of China,Taiyuan,030051,China [3]School of Chemistry and Chemical Engineering,North University of China,Taiyuan,030051,China [4]School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,QLD,4072,Australia

出　　处：《Rare Metals》2024年第3期984-994,共11页稀有金属（英文版）

基　　金：financially supported by the Fundamental Research Program of Shanxi Province(No.202103021224177);the Science and Technology Cooperation and Exchange Special Project of Shanxi Province(No.202204041101005);the Key Laboratory Research Foundation of North University of China and Shanxi Key Laboratory of Advanced Carbon Electrode Materials(No.202104010910019);the funding support from the Australian Research Council(No.DP200102573)。

摘　　要：Solid polymer electrolytes(SPEs)with high ionic conductivity are desirable for solid-state lithium metal batteries(SSLMBs)to achieve enhanced safety and energy density.Incorporating nanofillers into a polymeric matrix to develop nanocomposite solid electrolytes(NCSEs)has become a promising method for improving the ionic conductivity of the SPEs.Here,a novel ZIF-8-functionalized NCSE was prepared for high-temperature S SLMB s using an in situ radical polymerization method.It is found that the ZIF-8 nanoparticles could reduce the crystallinity of polymer segments and offer a Lewis acid surface that promotes the dissociation of lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)and stabilizes the TFSI^(-) anion movement.Thus,the as-prepared NCSE exhibits an outstanding ionic conductivity of 1.63×10^(-3)S·cm^(-1),an electrochem ical stability window of 5.0 V at 80℃,and excellent interface compatibility with lithium metal anode with a stable polarization over 2000 h.Furthermore,the assembled SSLMBs with LiFePO_(4)cathode show dendrite-free Li-metal surface,good rate capability,and stable cycling stability with a capacity retention of 70%over 1000 cycles at a high temperature of 80℃.This work provides valuable insights into promoting the ionic conductivity of SPEs.

关 键 词：Lithium metal batteries Metal-organic frameworks Solid polymer electrolytes Lithium metal anode Interfacial compatibility 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.1[理学—物理化学]