Synergistically enabling the interface stability of lithium metal batteries with soft ionic gel and garnet-type Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)ceramic filler  

作　　者：Qiujun Wang Weiqi Zhu Ya Su Di Zhang Zhaojin Li Huan Wang Huilan Sun Bo Wang Dan Zhou Li-Zhen Fan 

机构地区：[1]Hebei Key Laboratory of Flexible Functional Materials,School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang,050000,China [2]Beijing Advanced Innovation Center for Materials Genome Engineering,Institute of Advanced Materials and Technology,University of Science and Technology Beijing,Beijing,100083,China

出　　处：《Journal of Materiomics》2023年第3期568-576,共9页无机材料学学报（英文）

基　　金：supported by the National Natural Science Foundation of China(22008053,52002111);Key Research and Development Program of Hebei Province(20310601D,205A4401D);the Natural Science Foundation of Hebei Province(B2021208061,B2022208006,E2022208023);the Science Foundation of University of Hebei Province(BJ2020053);Beijing Natural Science Foundation(Z200011).

摘　　要：Lithium metal batteries based on solid electrolytes are considered as promising candidates with high energy density and safety.However,the weak solid-solid contact between electrolyte and electrode can easily lead to interface instability and lithium ions discontinuous migration,which seriously reduces the electrochemical performance of the battery.Herein,we construct a soft gel interfacial layer to improve the stability of the solid-solid interface between electrolyte and electrode by means of polyester-based monomers and imidazole-based ionic liquids.Based on this,garnet-type Li_(6.4)La_(3)Zr_(1.4)Ta_(0.6)O_(12)(LLZTO)particles as inorganic ceramic filler were introduced in the layer to obtain composite electrolytes with high ionic conductivity(up to 1.1×10^(-3)S/cm at 25℃).As a result,the assembled lithium symmetric battery of Li|THCE-15%LLZTO|Li suggests excellent cycling stability with 700 h at 0.1 mA/cm^(2)at 50℃,and the lithium metal batteries of LFP|THCE-15%LLZTO|Li delivers high initial discharge capacity of 128.2 mA·h/g with capacity retain of 75.48%after 150 cycles at 2 C.This work paves a new route to build safe and stable lithium metal batteries with synergistic introduction of composite electrolytes between electrolyte and electrode using soft gel interfacial layer and inorganic filler.

关 键 词：Lithium metal batteries Ionic liquid In-situ polymerization Soft interfacial layer Composite electrolyte 

分 类 号：TM912[电气工程—电力电子与电力传动]