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.
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).
