Electrochemical properties of spinel compound LiNi0.5Mn1.2Ti0.3O4 as cathode materials for lithium i

• 作 者: LIU Guoqiang GUO Qingshan LI Xiaoxia WU Qiuyang
• 机 构: School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
• 出 处: 稀有金属（英文版）
• 发表日期: 2010年6期
• 关键词: lithium batteries cathode materials sol-gel process electrochemical properties

The electrochemical properties of spinel compound LiNi0.5Mn1.2Ti0.3O4 were investigated in this study. The chemicals LiAc·2H2O, ity of the sample reached 134 mAh/g at a current rate of 0.1C. The first and fifth cycle voltammogram almost overlapped, which showed that the prepared sample LiNi0.5Mn1.2Ti0.3O4 had excellent good cycle performance. There were two oxidation peaks at 4.21 V and 4.86 V, and two reduction peaks at 4.55 V and 3.88 V in the cycle voltammogram, respectively. By electrochemical impedance spectroscopy and its fit-ted result, the lithium ion diffusion coefficient was measured to be approximately 7.76×10-11 cm2/s.