有色金属材料与工程2024，Vol.45Issue(6)：16-23,8.DOI:10.13258/j.cnki.nmme.20241031001
核壳纤维结构PEO-LiTFSI-SiO2复合固体电解质
PEO-LiTFSI-SiO2 composite solid electrolyte with core-shell fiber structure
摘要
Abstract
Polymer-based solid electrolytes are expected to be the first to be applied in solid-state batteries,in which effective film formation and inhibit the growth of dendrites are of great significance.A PEO-LiTFSI-SiO2 composite solid electrolyte(CSE)was prepared using the coaxial electrospinning method.The ionic conductivity and inhibition ability of lithium dendrites of the CSE were investigated.The results showed that the ionic conductivity reaches 1.4×10-4 S/cm,with a tensile strength of 5.64 MPa.The cycle life of lithium symmetric cells is significantly extended to 900 h under a current density of 0.1 mA/cm2.Furthermore,the assembled LiFePO4||Li solid-state battery exhibited an initial discharge specific capacity of 149 mA·h/g at 0.2 C,with a capacity retention rate of 95%after 200 cycle.These findings demonstrate the significant advantages of coaxial electrospinning for producing CSE,which can markedly improve ionic conductivity and effectively prevent lithium dendrite formation.关键词
复合固体电解质/固态电池/同轴静电纺丝Key words
composite solid electrolyte/solid-state battery/coaxial electrospinning分类
动力与电气工程引用本文复制引用
杜玉霖,郭祖民,庞越鹏..核壳纤维结构PEO-LiTFSI-SiO2复合固体电解质[J].有色金属材料与工程,2024,45(6):16-23,8.基金项目
国家自然科学基金资助项目(52171218) （52171218）
