摘要
NASICON type solid electrolyte Li_(1+x)Al_(x)Ge_(2-x)(PO_(4))_(3)(LAGP)is one of the most potential candidates in view of their high ionic conductivity,high oxidation resistance and excellent air stability.However,inevitable interface issues often cause severe performance degradation,seriously affecting its commercial application.Herein,a lithiophilic carbon buffer layer is constructed on the LAGP surface adjacent to the Li electrode side by a facile pyrolysis reaction,then the LiC_(x) interlayer is generated in situ between the carbon buffer layer and lithium metal,which can guide uniform ion transport while improving interface contact.Thus,the LiC_(x)-LAGP showed excellent ionic conductivity,high flexibility and lithiophilic interphase.Specially,the Li|LiC_(x)-LAGP|Li battery has achieved a 1000 h stable cycles at 0.1 mA/cm^(2),remarkably,the Li|LiC_(x)-LAGP|LFP battery retains 85%of their initial capacity after 200 cycles under 1 C,even for the NCM811 cathode,the battery still has a good cycle performance.
基金
financially supported by the National Natural Science Foundation of China(Nos.52372188,51902090)
Henan Key Research Project Plan for Higher Education Institutions(Nos.24A150019,23A150038)
Key Scientific Research Project of Education Department of Henan Province(No.22A150042)
the National students’platform for innovation and entrepreneurship training program(No.201910476010)
CAS Henan Industrial Technology Innovation&Incubation Center(No.2024121)
2023 Introduction of studying abroad talent program,the China Postdoctoral Science Foundation(No.2019 M652546)
the Henan Province Postdoctoral Start-Up Foundation(No.1901017).
