Inorganic/polymer hybrid layer stabilizing anode/electrolyte interfaces in solid-state Li metal batteries  

作　　者：Yiran Hu Yiren Zhong Limin Qi Hailiang Wang 

机构地区：[1]Beijing National Laboratory for Molecular Sciences(BNLMS),College of Chemistry and Molecular Engineering,Peking University,Beijing,100871,China [2]Department of Chemistry and Energy Sciences Institute,Yale University,West Haven,CT,06516,USA

出　　处：《Nano Research》2020年第12期3230-3234,共5页纳米研究（英文版）

基　　金：This work was supported by the US National Science Foundation(No.CBET-1903342);Y.R.H.acknowledges the exchange graduate student scholarship from the China Scholarship Council.Y.R.Z.acknowledges the Link Foundation Energy Fellowship.L.M.Q.acknowledges support from the Ministry of Science and Technology of China(No.2018YFA0703502);H.L.W.acknowledges the Sloan Research Fellowship.

摘　　要：Li1.5Al0.5Ge1.5(PO4)3(LAGP)is a solid-state electrolyte with high ionic conductivity and air stability but poor chemical stability and high interfacial impedance when directly contacted with Li metal.In this work,we develop an inorganic/polymer hybrid interlayer composed of Li bis(trifluoromethylsulfonyl)imide/poly(vinylene carbonate)polymer electrolyte and SiO2 submicrospheres to stabilize the Li/LAGP interface.The polymeric component renders high ionic conductance and low interfacial resistance,whereas the inorganic component imparts flame retardancy and a physical barrier to the known Li-LAGP side reaction,together enabling stable Li stripping/plating for more than 1,500 h at room temperature.With this interlayer at both electrodes,all-solid-state Li∥LiFePO4 full cells with stable cycling performance are also demonstrated.

关 键 词：Li1.5Al0.5Ge1.5(PO4)3(LAGP) hybrid interlayer solid-state electrolyte Li metal battery interface 

分 类 号：TM912[电气工程—电力电子与电力传动]