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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Requirement of high lithium content in Ni-rich layered oxide material for Li ion batteries
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Requirement of high lithium content in Ni-rich layered oxide material for Li ion batteries

机译：用于Li离子电池的Ni富含Ni的层状氧化物材料中的高锂含量的要求

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摘要

The formation of lithium residuals in Ni-rich nickel cobalt manganese oxide is inevitable, due to of the cation mixing by Ni2+ and excess Li required for high energy density. The purpose of this study is to examine the role of Li content in such materials after the washing process, which could reduce Li residuals and enhance the electrochemical performance of lithium ion batteries containing Li1.0Ni0.91-Co0.06Mn0.03O2 (NCM) as the cathode. The washing process reduced the Li residuals on the surface as well as the Li in the NCM structure. When a low Li content is used in the NCM, the Li content remaining in its structure after washing is lower than 1 mol. This removal of Li residues from the surface after washing leads to a capacity drop in spite of the improved cycle retention. Therefore, a high Li content is required in order to obtain enhanced electrochemical performance of high-Ni NCM. This trend regarding the Li content is also shown for NCM with small particle size. (C) 2018 Elsevier B.V. All rights reserved.
机译：由于Ni2 +的阳离子混合和高能量密度所需的过量Li，形成富含Ni的镍钴锰氧化物中的锂残留物是不可避免的。本研究的目的是在洗涤过程后检查Li含量在这些材料中的作用，这可以降低Li残留物，增强含有Li1.0Ni0.91-COO 0.06MN0.03O2（NCM）的锂离子电池的电化学性能作为阴极。洗涤过程将表面上的Li残留物和NCM结构中的LI降低。当在NCM中使用低li含量时，洗涤后留下其结构的LI含量低于1摩尔。尽管改善的循环保留，在洗涤后，从表面脱离表面除去Li残留物。因此，需要高锂含量以获得高Ni NCM的增强电化学性能。对于LI含量的这种趋势也显示出小粒径小的NCM。 （c）2018年elestvier b.v.保留所有权利。

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