Abstract Nanocrystalline Li(Ni1/3Co1/3Mn1/3)O2 (NCM layered oxide) was synthesized through the solution combustion route to use as the cathode material in the Li-ion battery. Reduced graphene oxide (RGO) was employed as the additive to improve electrochemical performance of the battery. Graphene oxide was reduced by microwave irradiation. The RGO was wrapped around the NCM when added in different weight fractions to fabricate nanocomposite mixtures for use as the cathode of the LIB. The initial charge//discharge capacities of NCM and NCM–5 wt.% RGO were measured at a rate of 0.05C in the voltage window of 2.5–4.3 V at room temperature and showed values 198.1//167.6 mAh/g and 209.2//186.6 mAh/g, respectively. The capacity retention of the optimum graphene-containing cathode during the cycling testing at different C rates increased to 99.6% as compared to that of pristine NCM cathode being 94.7%. Impedance spectroscopy studies revealed that graphene additive caused a decrease in the charge transfer resistance and an increase in the Li-ion diffusion coefficient.

中文翻译：

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微波还原氧化石墨烯包裹 NCM 层状氧化物作为锂离子电池的正极材料

摘要 采用溶液燃烧法合成纳米晶Li(Ni1/3Co1/3Mn1/3)O2（NCM层状氧化物），作为锂离子电池正极材料。还原氧化石墨烯（RGO）被用作添加剂以改善电池的电化学性能。通过微波辐射还原氧化石墨烯。当以不同的重量分数添加时，RGO 被包裹在 NCM 周围，以制造用作 LIB 阴极的纳米复合材料混合物。NCM 和 NCM–5 wt.% RGO 的初始充电/放电容量在室温下 2.5–4.3 V 的电压窗口中以 0.05C 的速率测量，并显示值 198.1//167.6 mAh/g 和 209.2/ /186.6 mAh/g。在不同 C 倍率的循环测试期间，最佳含石墨烯正极的容量保持率增加到 99。6% 与原始 NCM 阴极的 94.7% 相比。阻抗谱研究表明，石墨烯添加剂导致电荷转移电阻降低和锂离子扩散系数增加。