Status and prospect of garnet/polymer solid composite electrolytes for all-solid-state lithium batteries  

作　　者：Liansheng Li Yuanfu Deng Guohua Chen 

机构地区：[1]The Key Laboratory of Fuel Cell for Guangdong Province,School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China [2]Electrochemical Energy Engineering Research Center of Guangdong Province,South China University of Technology,Guangzhou 510640,Guangdong,China [3]Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hung Hom,Kowloon,Hong Kong,China

出　　处：《Journal of Energy Chemistry》2020年第11期154-177,共24页能源化学（英文版）

基　　金：the National Natural Science Foundation of China(Grant No.21875071);the National Natural Science Foundation of China-Hong Kong Research Grant Council(NSFC-RGC)Joint Research Scheme(Grant No.21661162002 and N_HKUST601/16);the Guangzhou Scientific and Technological Planning Project(Grant No.201704030061)。

摘　　要：Solid polymer electrolytes(SPEs), such as polyethylene oxide(PEO), are characteristic of good flexibility and excellent processability, but they suffer from low ionic conductivity and small Li+transference number at ambient temperature. Inorganic solid electrolytes(ISEs), garnet-type Li7La3Zr2O12 and its derivatives(LLZO-based) in particular, possess high ionic conductivity at room temperature, wide electrochemical stability window, large Li+transference number as well as good stability against Li metal anode.Nevertheless, lithium dendrites growth, interfacial contact issue and brittle nature of LLZO-based ceramic electrolytes prevent their practical applications. In response to these shortcomings, LLZO-based/polymer solid composite electrolytes(SCEs), taking complementary advantages of two kinds of electrolytes, and thus simultaneously improving the electrode wettability, ionic conductivity and mechanical strength, have been made to develop high-performance SCEs in recent years. Herein, the intrinsic properties and research progress of LLZO-based/polymer SCEs, including LLZO-based/PEO SCEs(LLZO-based/PEO SCEs with uniform dispersion of LLZO-based fillers and LLZO-based/PEO layered SCEs) and LLZO-based/novel polymers SCEs, are summarized. Besides, comprehensive updates on their applications in solid-state batteries are also presented. Finally, challenges and perspectives of LLZO-based/polymer SCEs for advanced allsolid-state lithium batteries(ASSLBs) are suggested. This review paper aims to provide systematic research progress of LLZO-based/polymer SCEs, to allow for more efficient and target-oriented research on improving LLZO-based/polymer SCEs.

关 键 词：Solid polymer electrolyte Garnet-type electrolyte Solid composite electrolyte All-solid-state battery 

分 类 号：TB332[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]