The effects of TiO2 coating on the electrochemical performance of LiLi0.2Mn0.54Ni0.13Co0.13O2 cathode material for lithium-ion battery

摘要：

TiO2-coated LiLi0.2Mn0.54Ni0.13Co0.13O2 materials have been synthesized and investigated as cathode materials for lithium-ion batteries at both 25℃ and elevated temperature (55℃). The structure and morphology of the coated samples were characterized and compared. The XRD results indicate that lattice parameters of the materials did not change distinctly after surface coating. The SEM images demonstrate that the surface of LiLi0.2Mn0.54Ni0.13Co0.13O2 samples were covered with nano-sized TiO2 particles. Differential scanning calorimetry (DSC) analysis results show that thermal stability of the materials was improved. It is also shown that the irreversible capacity loss of the materials was obviously reduced and their capacity retention behaviour was improved after surface modification.

关键词： Lithium-rich cathode materials TiO2-coating layer Lithium-ion battery Surface modifications Electrochemical performance

作者: J.M.Zheng J.Li Z.R.Zhang X.J.Guo Y.Yang

作者单位: State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, Xiamen University, Xiamen 361005, PR China

会议类型: 国际会议

会议名称: The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)

会议地点: 上海

会议语种:英文

页码: 1794-1799

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）