LPEO enhanced LAGP composite solid electrolytes for lithium metal batteries  

作　　者：Dongmei Dai Pengyao Yan Xinxin Zhou Haowen Li Zhuangzhuang Zhang Liang Wang Mingming Han Xiaobing Lai Yaru Qiao Mengmin Jia Bao Li Dai-Huo Liu 

机构地区：[1]Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals,Key Laboratory of Green Chemical Media and Reactions(Ministry of Education),School of Chemistry and Chemical Engineering,Henan Normal University,Xinxiang 453007,China [2]CAS Henan Industrial Technology Innovation&Incubation Center,Zhengzhou 450000,China

出　　处：《Green Carbon》2024年第3期310-315,共6页绿碳（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.52372188,51902090);Henan Key Research Project Plan for Higher Education Institutions(No.24A150019,23A150038);2023 Introduction of studying abroad talent program,“111 Project”(No.D17007);Henan Provincial Key Scientific Research Project of Colleges and Universities(No.23A150038);Key Scientific Research Project of Education Department of Henan Province(No.22A150042);the National Students,Platform for Innovation and Entrepreneurship Training Program(No.201910476010);the China Postdoctoral Science Foundation(No.2019 M652546);the Henan Province Postdoctoral Start-Up Foundation(No.1901017).

摘　　要：The application of solid electrolyte is expected to realize the commercialization of high energy density lithium metal batteries(LMBs).While the interfacial contact between solid inorganic electrolyte and electrodes has become a stumbling block for achieving stable cycling in LMBs.In this work,a Li-containing polyethylene oxide(LPEO)was introduced between LAGP and electrodes as a buffer layer to regulate the interfacial compatibility and reduce interfacial impedance,inhibiting the side reactions.Moreover,ether-oxygen bond on LPEO chain can coordinate with Li+and guide the transportation of Li+,achieving fast Li+diffusion between Li1+xAlxGe2-x(PO4)3(LAGP)and electrodes.Specifically,the growth of lithium dendrites is effectively suppressed in LAGP with LPEO modification,which would lead to remarkable cycling stability and rate capability.Therefore,the Li|LPEO-LAGP|Li battery can cycle stably for more than 600 h at 0.1 mA cm−2.In addition,long-term performance of Li|LPEO-LAGP|LiFePO4(LFP)battery was achieved at a rate of 0.4 C,and capacity retention is more than 74%after 200 cycles.The Li|LPEO-LAGP|LiNi0.8Co0.1Mn0.1O2 also realized the steady operation in the voltage range of 2.8-4.3 V.

关 键 词：LAGP solid electrolyte LPEO buffer layer Interfacial modification High ionic conductivity Lithium metal battery 

分 类 号：TM912[电气工程—电力电子与电力传动]