| 正极材料LiNi0.5Mn1.5O4的合成及性能 |
| Synthesis and Property of Cathode Material LiNi0.5Mn1.5O4 |
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| 摘要: 采用低温固相法制备镍锰复合草酸盐，煅烧后生成的镍锰复合氧化物与Li3CO3混合，在空气中于700 ℃反应12 h，得到LiNi0.5Mn1.5O4。通过XRD，SEM和恒电流充放电测试对样品进行了表征。XRD结果表明：复合草酸盐经390 ℃煅烧3 h，生成了多相氧化物；合成的LiNi0.5Mn1.5O4为纯相，具有立方尖晶石结构。电化学测试结果表明，合成的样品在室温和高温(55 ℃)下，具有较好的电化学性能；大电流充放电时，具有良好的循环性能。 |
| 关键词: 锂离子电池 正极材料 LiNi0.5Mn1.5O4 倍率性能 |
| 基金项目: |
| Abstract: Composite oxide of nickel and manganese was prepared by calcination of composite oxalate synthesised by solid-state reaction at low temperature. LiNi0.5Mn1.5O4 was then synthesised by firing the mixture of the as-prepared composite oxide and Li2CO3 at 700 ℃ for 12 hours in air. The sample was characterized by XRD, SEM and charge-discharge tests. XRD pattern showed that the composite nickel and manganese oxide prepared at 390 ℃ for 3 hours was composed of several phases. The synthesized LiNi0.5Mn1.5O4 had the pure spinel structure. The electrochemical test showed that LiNi0.5Mn1.5O4 delivered good electrochemical performance both at room temperature and high temperature (55 ℃), and it showed good cycle performance under high current density. |
| Keywords: lithium ion batteries cathode material LiNi0.5Mn1.5O4 rate capability |
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| 季勇,王志兴,尹周澜,郭华军,彭文杰,李新海.正极材料LiNi0.5Mn1.5O4的合成及性能[J].无机化学学报,2007,23(4):597-601. |
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