标题：Reduction of the lithium and nickel site substitution in Li1+xNi0.5Co0.2Mn0.3O2with Li excess as a cathode electrode material for Li-ion batteries
作者：Gu, Yi-Jie ;Zhang, Qing-Gang ;Chen, Yun-Bo ;Liu, Hong-Quan ;Ding, Jian-Xu ;Wang, Yan-Min ;Wang, Hai-Feng ;Chen, Lin ;Wang, Meng ;Fan, Shun-Wei ;Zang, 更多 作者机构：[Gu, Yi-Jie ;Zhang, Qing-Gang ;Chen, Yun-Bo ;Liu, Hong-Quan ;Ding, Jian-Xu ;Wang, Yan-Min ;Fan, Shun-Wei ;Zang, Qing-Feng ;Yang, Xiu-Li ] College of M 更多
来源：Journal of Alloys and Compounds
摘要：Layered Li1+xNi0.5Co0.2Mn0.3O2(x = 0, 0.02, 0.04, 0.06, 0.08) materials were synthesized using the co-precipitation method. Rietveld refinements measurements reveal that the concentration of Ni2+-3b ions decreases from 0.06 to 0.043, with x changing from 0.02 to 0.08. The initial coulombic efficiency improves with the increase in the content of Li-excess because the content of Ni at the 3b site decreases with the increase of Li-excess in the samples from 0 to 0.08. The analysis indicates that Li1.08Ni0.5Co0.2Mn0.3O2exhibits the largest diffusivity value due to the dependence of the diffusion coefficient of lithium ions on the content of Ni in the 3b sites.
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