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Mechanochemical Synthesis of Li2MnO3 Shell/LiMO2 (M = Ni Co Mn) Core-Structured Nanocomposites for Lithium-Ion Batteries

机译：锂离子电池用Li2MnO3壳/ LiMO2（M = NiCoMn）核结构纳米复合材料的机械化学合成

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Core/shell-like nanostructured xLi2MnO3>·(1−x)LiMO2 (M = Ni, Co, Mn) composite cathode materials are successfully synthesized through a simple solid-state reaction using a mechanochemical ball-milling process. The LiMO2 core is designed to have a high-content of Ni, which increases the specific capacity. The detrimental surface effects arising from the high Ni-content are countered by the Li2MnO3 shell, which stabilizes the nanoparticles. The electrochemical performances and thermal stabilities of the synthesized nanocomposites are compared with those of bare LiMO2. In particular, the results of time-resolved X-ray diffraction (TR-XRD) analyses of xLi2MnO3>·(1−x)LiMO2 nanocomposites as well as their differential scanning calorimetry (DSC) profiles demonstrate that the Li2MnO3 shell is effective in stabilizing the LiMO2 core at high temperatures, making the nanocomposites highly suitable from a safety viewpoint.

机译：通过机械化学球磨法通过简单的固态反应成功合成了核/壳状纳米结构xLi2MnO3 >·（1-x）LiMO2（M = Ni，Co，Mn）复合阴极材料。 LiMO2磁芯设计为具有高含量的Ni，从而增加了比容量。高Ni含量产生的有害表面效应被Li2MnO3壳层抵消，该壳层稳定了纳米颗粒。将合成的纳米复合材料的电化学性能和热稳定性与裸露的LiMO2进行了比较。特别是xLi2MnO3 >·（1-x）LiMO2纳米复合材料的时间分辨X射线衍射（TR-XRD）分析结果及其差示扫描量热法（DSC）曲线表明Li 2 MnO 3壳在高温下有效地稳定LiMO 2核，从安全的角度来看，使纳米复合材料非常合适。

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期刊名称 Scientific Reports
作者
Jae-Kyo Noh; Soo Kim; Haesik Kim; Wonchang Choi; Wonyoung Chang; Dongjin Byun; Byung-Won Cho; Kyung Yoon Chung;
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年(卷),期 -1(4),-1
年度 -1
页码 4847
总页数 9
原文格式 PDF
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Mechanochemical Synthesis of Li2MnO3 Shell/LiMO2 (M = Ni Co Mn) Core-Structured Nanocomposites for Lithium-Ion Batteries

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