Bifunctional flame retardant solid-state electrolyte toward safe Li metal batteries

作     者：Qiang Lv Yajie Song Bo Wang Shangjie Wang Bochen Wu Yutong Jing Huaizheng Ren Shengbo Yang Lei Wang Lihui Xiao Dianlong Wang Huakun Liu Shixue Dou Qiang Lv;Yajie Song;Bo Wang;Shangjie Wang;Bochen Wu;Yutong Jing;Huaizheng Ren;Shengbo Yang;Lei Wang;Lihui Xiao;Dianlong Wang;Huakun Liu;Shixue Dou

作者机构：MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and StorageState Key Laboratory of Urban Water Resource and EnvironmentSchool of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina Institute for Superconducting&Electronic MaterialsAustralian Institute of Innovative MaterialsUniversity of WollongongWollongongNSW 2500Australia Institute of Energy Material ScienceUniversity of Shanghai for Science and TechnologyShanghai 200093China 

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

年 卷 期：2023年第81卷第6期

页      面：613-622,I0014页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0907[农学-林学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.51604089,51874110,22173066,21903058) the Natural Science Foundation of Heilongjiang Province (Grant No.YQ2021B004) Open Project of State Key Laboratory of Urban Water Resource and Environment (Grant No.QA202138)。 

主　　题：Solid polymer electrolytes Safe Li metal batteries Li dendrites Hydroxyapatite N-methyl pyrrolidone PVDF-HFP Fireproof property 

摘      要：Solid polymer electrolytes(SPEs)are one of the most promising alternatives to flammable liquid electrolytes for building safe Li metal batteries.Nevertheless,the poor ionic conductivity at room temperature(RT)and low resistance to Li dendrites seriously hinder the commercialization of SPEs.Herein,we design a bifunctional flame retardant SPE by combining hydroxyapatite(HAP)nanomaterials with Nmethyl pyrrolidone(NMP)in the PVDF-HFP matrix.The addition of HAP generates a hydrogen bond network with the PVDF-HFP matrix and cooperates with NMP to facilitate the dissociation of Li TFSI in the PVDF-HFP matrix.Consequently,the prepared SPE demonstrates superior ionic conductivity at RT,excellent fireproof properties,and strong resistance to Li dendrites.The assembled Li symmetric cell with prepared SPE exhibits a stable cycling performance of over 1200 h at 0.2 m A cm^(-2),and the solid-state LiFePO_4||Li cell shows excellent capacity retention of 85.3%over 600 cycles at 0.5 C.