【作者】 张建； 张熙贵； 刘浩涵； 杨传铮； 夏保佳；

【Author】 ZHANG Jian,ZHANG Xi-gui,LIU Hao-han,YANG Chuan-zheng,XIA Bao-jia (Shanghai Institute of Micro-system and Information Technology,Chinese Academy of Science,Shanghai 200050)

【机构】 中国科学院上海微系统与信息技术研究所；

【摘要】 根据LiNi_xCo_yMn_1-x-yO₂材料中Li⁺/Ni²⁺的阳离子混排占位模型进行模拟计算,建立(I₀₀₃/I₁₀₄)^1/2、(I₁₀₁/I₀₁₂)^1/2和I(I₁₀₁/I₁₀₄)^1/2特征衍射线强度比与混排占位参数的线性方程式。采用X射线衍射谱,研究了LiNi_0.6Co_0.2Mn_0.2O₂合成过程中阳离子混排的演变过程。研究结果表明,随着合成温度的升高,Li(Ni_0.6Co_0.2Mn_0.2)O₂中Li⁺/Ni²⁺的混排现象经历了先减小再增大的过程,850℃焙烧得到的材料中阳离子混排程度最低,说明850℃是合成Li(Ni_0.6Co_0.2Mn_0.2)O₂的最佳温度。更多还原

【Abstract】 According to the Li⁺/Ni²⁺ cation mixing model in the LiNi_xCo_yMn_1-x-yO₂ crystall,the linear correlations between the characteristic diffraction intensity(I₀₀₃/I₁₀₄)^1/2,(I₁₀₁/I₀₁₂^1/2,I(I₁₀₁/I₁₀₄)^1/2 and cation mixing parameter were founded.The cation mixing evolution in the preparation of LiNi_0.6Co_0.2Mn_0.2O₂ were studied by X-ray powder diffraction.The results showed that the Li⁺/Ni²⁺ cation mixing decreased at first and then increased with the rising of the sinter temperature.The 850℃is the best sinter temperature for the lowest cation mixing in the LiNi_0.6Co_0.2Mn_0.2O₂.更多还原