【作者】 魏进平； 翟金玲； 夏小勇； 阎杰； 王晓宇； 孙欣；

【Author】 Wei Jinping , Zhai Jinling, Xia Xiaoyong, Yan Jie, Wang Xiaoyu, Sun Xin(Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China)

【机构】 南开大学新能源材料化学研究所；

【摘要】 采用本实验室电解制得的Co0.2Ni0.8(OH)2与LiOH·H2O和稀土氧化物按比例混合均匀后通过高温固相反应制备正极材料。对掺杂稀土元素的LiCo0.2Ni0.8O2正极材料的研究表明,掺杂1%含量稀土元素所制得的正极材料具有较佳的性能。XRD分析结果表明,掺入Y,La的正极材料晶胞参数c轴变大,这有助于锂离子的嵌入脱出,可改善和提高正极材料的电化学性能。更多还原

【Abstract】 Some compounds of Li(Co0.2Ni0.8)xR1-xO2 (R= rare earth elements) were prepared with Co0.2Ni0.8 (OH)2 made from electrolysis, rare earth oxides and LiOH·2O via solid state synthesis. The structure characteristics of the Li(Co0.2Ni0.8)xR1-xO2 were investigated by XRD. It was found that the lattice parameters c of Li(Coo.2Ni0.8)xR1-xO2 (R= Y, La) increased compared to LiCo0.2Ni0.8O2. The performance of Li(Co0.2Ni0.8)xR1-xO2 as the cathode materials in lithium ion battery is much better when x is 0.01.更多还原