电源技术2025，Vol.49Issue(12)：2517-2522,6.DOI:10.3969/j.issn.1002-087X.2025.12.007
基于表面改性离子导体固态复合正极构建研究
Research on constructing solid-state composite cathodes using surface-modified ionic conductors
摘要
Abstract
To address the issue of poor interfacial compatibility between the ceramic electrolyte(act-ing as the ionic conduction phase)and the cathode active material within the composite cathode of solid-state batteries,surface modification was performed on the Li6.75La3Zr1.75Ta0.25O12(LLZTO)ce-ramic material.Physicochemical analysis and electrochemical testing reveal that alkaline residues on the LLZTO surface reacted with Co-containing transition metal ion compounds,introducing a LiCoO2 functional derivative layer.This effectively prevented direct contact between the solid electro-lyte conduction phase and the cathode active material in the composite cathode,enhancing the com-patibility of the heterogeneous interface.A pouch-type solid-state battery based on LLZTO/PVDF-based solid electrolyte system was fabricated using large-scale composite electrode with modified ionic conduction ceramic material.The cathode active material exhibits promising electrochemical characteristics with a capacity retention rate of 91.8％after 50 cycles.关键词
固态电池/复合正极/电解质/表面处理/电化学性能Key words
solid-state battery/composite cathode/electrolyte/surface modification/electrochemical performance分类
信息技术与安全科学引用本文复制引用
李杨,于智航,刘兴江..基于表面改性离子导体固态复合正极构建研究[J].电源技术,2025,49(12):2517-2522,6.基金项目
天津市科技计划项目(24ZXZSSS00340) （24ZXZSSS00340）
