| Electrochemical properties of spinel compound LiNi_（0.5）Mn_（1.2）Ti_（0.3）O_4 as cathode materials for lithium ion batteries |
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| 引用本文： | LIU Guoqiang,GUO Qingshan,LI Xiaoxia,WU Qiuyang. Electrochemical properties of spinel compound LiNi_（0.5）Mn_（1.2）Ti_（0.3）O_4 as cathode materials for lithium ion batteries[J]. 稀有金属(英文版), 2010, 29(6): 572-575. DOI: 10.1007/s12598-010-0171-7 |
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| 作者姓名： | LIU Guoqiang GUO Qingshan LI Xiaoxia WU Qiuyang |
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| 作者单位： | School of Materials and Metallurgy,Northeastern University,Shenyang 110004,China |
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| 摘 要： | The electrochemical properties of spinel compound LiNi0.5Mn1.2Ti0.3O4 were investigated in this study.The chemicals LiAc·2H2O,Mn(Ac)2·2H2O,Ni(Ac)2·4H2O,and Ti(OCH3)4 were used to synthesize LiNi0.5Mn1.2Ti0.3O4 by a simple sol-gel method.The discharge capacity 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 fitted result,the lithium ion diffusion coefficient was measured to be approximately 7.76 × 10?11 cm2/s.
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| 关 键 词： | 电化学性能 尖晶石型 正极材料 化合物 扩散系数测定 循环伏安 溶胶凝胶法 放电容量 |
| 收稿时间： | 2009-04-23 |
Electrochemical properties of spinel compound LiNi0.5Mn1.2Ti0.3O4 as cathode materials for lithium ion batteries |
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| Guoqiang Liu,Qingshan Guo,Xiaoxia Li,Qiuyang Wu. Electrochemical properties of spinel compound LiNi0.5Mn1.2Ti0.3O4 as cathode materials for lithium ion batteries[J]. Rare Metals, 2010, 29(6): 572-575. DOI: 10.1007/s12598-010-0171-7 |
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| Authors: | Guoqiang Liu Qingshan Guo Xiaoxia Li Qiuyang Wu |
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| Affiliation: | School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China |
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| Abstract: | The electrochemical properties of spinel compound LiNi0.5Mn1.2Ti0.3O4 were investigated in this study. The chemicals LiAc·2H2O, Mn(Ac)2·2H2O, Ni(Ac)2·4H2O, and Ti(OCH3)4 were used to synthesize LiNi0.5Mn1.2Ti0.3O4 by a simple sol-gel method. The discharge capacity 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 fitted result, the lithium ion diffusion coefficient was measured to be approximately 7.76 × 10−11 cm2/s. |
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| Keywords: | lithium batteries cathode materials sol-gel process electrochemical properties |
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