摘要
采用共沉淀法以化学计量比的Ni2+和Mn(4+1∶1)代替LiCoO2中的Co3+合成锂离子电池正极材料LiNi0.5-xCo2xMn0.5-xO2(x=0.1)。利用X射线衍射对其结构进行表征,结果表明材料的衍射峰与标准的α-NaFeO2层状结构完全对应,为层状嵌锂复合氧化物。LiNi0.4Co0.2Mn0.4O2在电压2.5—4.3V范围内表现出较好的电化学性能,循环25次后仍保持大约136mAh/g,具有很好的发展前景。
LiNi0.5-xCo2xMn0.5-xO2（x=0.1） is prepared by the simuhaneous substitution of Ni^2＋ and Mn^4＋ （ 1：1 ） for Co^3＋ in LiCoO2. It is prepared by/he mix hydroxide methyl using LiOH solution. X-ray diffraction pattern show that the material has a layer α-NaFeO2-type structure. The results show that LiNi0.4Co0.2Mn0.4O2 has about specific discharge capacity of 136 mAh/g after 25 cycle at 2.5-4.3 V. which would be a potential cathode.
出处
《河北化工》
2006年第1期22-23,26,共3页
Hebei Chemical Industry
基金
天津市自然科学基金资助项目(批准号023606111)
关键词
锂离子电池
正极材料
共沉淀法
电化学性能
Li-ion battery
cathode materials
co-precipitated method
elect rochemieal performance
