Silicon-carbide fiber-reinforced polymer electrolyte for all-solid-state lithium-metal batteries  

作　　者：Wen-Qing Wei Bing-Qiang Liu Yan-Qing Wang Kai Yan Hao Zhang Yu-Song Qi 

机构地区：[1]School of Mechanical and Automation,Weifang University,Weifang,261061,China [2]Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China [3]College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao,266590,China [4]School of Mechanical and Electrical,Weifang University of Science and Technology,Shouguang,262700,China

出　　处：《Rare Metals》2022年第11期3774-3782,共9页稀有金属（英文版）

基　　金：financially supported by Shandong Province Natural Science Foundation (No. ZR2020ME001)。

摘　　要：Silicon carbide(SiC) with various morphologies was employed as reinforcing fillers for poly(ethylene oxide)(PEO)-based solid polymer electrolytes(SPEs).Specific ally,the SiC nanoparticles with an average size of 5-10 μm endow a significant enhancement of the interaction between carbon atoms for the fillers and the oxygen atoms from the PEO-lithium bis(trifluoromethanesulfonyl)imide(LiTFSI) matrix,which provides rapid transport channels for mobile Li+and enhances the mechanical strength of SPEs.The SPEs reinforced with one-dimensional SiC nanoparticles exhibit superior Li^(+)conduction,good mechanical property,and uniform Li plating.Thus,a dendrite-free plating of lithium for 0.58 mAh at 0.1 mA·cm^(-2) and excellent cycle stability at various current densities for 250 h are achieved in Li/Li symmetric cells using SPEs electrolytes with 5.0 wt% SiC nanoparticles.Moreover,the LiFePO_(4)/Li full cells assembled using SPEs electrolytes with 5.0 wt% SiC nanoparticles provide a capacity of 151.5 mAh·g^(-1) at 0.1 mA·cm^(-2)(55℃),and maintained a Coulombic efficiency of 99% for 120 cycles.

关 键 词：All-solid-state batteries Polymer electrolyte Ionic conductivity Mechanical property Lithium dendrites 

分 类 号：TQ327[化学工程—合成树脂塑料工业] TM912[电气工程—电力电子与电力传动]