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The initial Coulombic efficiencies of the Li1.2Mn0.567Ni0.166Co0.067O2 lithium-rich material are largely improved by ruthenium substitution for manganese, and the highest value is about 86% with 284 mA h g−1 initial discharge capacity at room temperature when the content of substituted ruthenium is 5 mol%.
Yu et al. (Sun,) studied this question.