硅酸盐学报2018，Vol.46Issue(2)：268-274,7.DOI:10.14062/j.issn.0454-5648.2018.02.15
掺Al对LiNi0.85Co0.15O2结构、电化学性能和热稳定性的影响
Effect of Al Addition on Structure, Electrochemical Performance and Thermal Stability of LiNi0.85Co0.15O2
摘要
Abstract
A positive electrode material of LiNi0.85Co0.15O2 for lithium ion battery was doped with Al by a high-temperature solid state method. The effect of Al content on the structure, electrochemical properties and thermal stability of the material was investigated. The results show that Al atoms can be dissolved in LiNi0.85Co0.15O2 lattice occupying the positions of Ni atoms. The cell parameters of materialsa decreases while c increases, cation mixing degree firstly increases and then decreases, the crystal density decreases gradually, the electrode polarization becomes serious, the specific discharge capacity decreases, cycle performance and thermal stability improve when Al content increases. The optimum comprehensive performance of LiNi0.85–xCo0.15AlxO2 can be obtained at Al amount of 5％. The addition of Al can not inhibit the transition of LiNi0.85–xCo0.15AlxO2 from H1 to H2 phase during electrochemical cycling, while favors to stabilize H2 phase structure of the material and improve the comprehensive properties.关键词
正极材料/掺铝/微观结构/电化学性能/热稳定性Key words
cathode/dopped alumina/microstructure electrochemical property/thermal stability分类
化学工程引用本文复制引用
范广新,刘泽萍,闻寅,刘宝忠..掺Al对LiNi0.85Co0.15O2结构、电化学性能和热稳定性的影响[J].硅酸盐学报,2018,46(2):268-274,7.基金项目
国家自然科学基金项目(51671080, 51471065, U1304522) （51671080, 51471065, U1304522）
河南省高校科技创新团队(16IRTSTHN005). （16IRTSTHN005）
