In-situ coupling construction of interface bridge to enhance electrochemical stability of all solid-state lithium metal batteries  

作　　者：Qianwei Zhang Rong Yang Chao Li Lei Mao Bohai Wang Meng Luo Yinglin Yan Yiming Zou Lisheng Zhong Yunhua Xu 

机构地区：[1]International Research Center for Composite and Intelligent Manufacturing Technology,Institute of Chemical Power Sources,Xi’an University of Technology,Xi’an 710048,Shaanxi,China [2]School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China [3]School of Electrical Engineering,Xi’an University of Technology,Xi’an 710048,Shaanxi,China [4]Yulin University,Yulin 719000,Shaanxi,China

出　　处：《Journal of Energy Chemistry》2024年第2期18-26,I0003,共10页能源化学（英文版）

基　　金：supported by the Key Program(U20A20235)funded by the National Natural Science Foundation of China;the National Natural Science Foundation of China(52171127,51974242);the Natural Science Basic Research Program of Shaanxi(2023-JC-QN-0595);the Regional Innovation Capability Guidance Program of Shaanxi(2022QFY10-06);the Key R&D Program of Xianyang Science and Technology Bureau(2021ZDYF-GY-0029);the Program of Xi’an Science and Technology Bureau(23GXFW0066)。

摘　　要：Polymer-based composite electrolytes composed of three-dimensional Li_(6.4)La_(3)Zr_(2)Al_(0.2)O_(12)(3D-LLZAO)have attracted increasing attention due to their continuous ion conduction and satisfactory mechanical properties.However,the organic/inorganic interface is incompatible,resulting in slow lithium-ion transport at the interface.Therefore,the compatibility of organic/inorganic interface is an urgent problem to be solved.Inspired by the concept of“gecko eaves”,polymer-based composite solid electrolytes with dense interface structures were designed.The bridging of organic/inorganic interfaces was established by introducing silane coupling agent(3-chloropropyl)trimethoxysilane(CTMS)into the PEO-3D-LLZAO(PL)electrolyte.The in-situ coupling reaction improves the interface affinity,strengthens the organic/inorganic interaction,reduces the interface resistance,and thus achieves an efficient interface ion transport network.The prepared PEO-3D-LLZAO-CTMS(PLC)electrolyte exhibits enhanced ionic conductivity of 6.04×10^(-4)S cm^(-1)and high ion migration number(0.61)at 60℃and broadens the electrochemical window(5.1 V).At the same time,the PLC electrolyte has good thermal stability and high mechanical properties.Moreover,the Li Fe PO_(4)|PLC|Li battery has excellent rate performance and cycling stability with a capacity decay rate of 2.2%after 100 cycles at 60℃and 0.1 C.These advantages of PLC membranes indicate that this design approach is indeed practical,and the in-situ coupling method provides a new approach to address interface compatibility issues.

关 键 词：Organic/inorganic interphase Coupling effect Composite electrolyte Interface compatibility 

分 类 号：TB34[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]