Abstract P2-type layered structure manganese-based materials have been reported as the most promising candidates for practical applications of sodium ion batteries because of their high capacity, facile fabrication, low cost, and environmental friendliness. In this work, a new P2-type layered structure Na1.0Li0.2Mn0.7Ti0.1O2 material was successfully synthesized by a conventional solid-state reaction method. The material delivered a superior specific capacity of 163 mAh g−1 at 0.1C within the potential range from 1.5 to 4 V. The capacity and the coulombic efficiency of the material remained of 90% and 97% after 50 cycles of charge/discharge at a rate of 0.1C. The material also exhibited an excellent rate capability, with a discharge capacity of over 100 mAh.g−1 remained at a rate of 1.0C. The observed results suggested that Na1.0Li0.2Mn0.7Ti0.1O2 is a promising cathode material for sodium ion batteries.

中文翻译：

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P2型层状结构Na1.0Li0.2Mn0.7Ti0.1O2作为钠离子电池正极材料的优异电化学性能

摘要 P2 型层状结构锰基材料因其容量高、制造容易、成本低和环境友好而被认为是钠离子电池实际应用中最有前途的候选材料。本工作采用常规固相反应方法成功合成了一种新型P2型层状结构Na1.0Li0.2Mn0.7Ti0.1O2材料。该材料在 1.5 至 4 V 的电位范围内在 0.1C 时提供了 163 mAh g-1 的优异比容量。 在 50 次充放电循环后，材料的容量和库仑效率保持在 90% 和 97% 0.1C的比率。该材料还表现出优异的倍率性能，在 1.0C 倍率下放电容量超过 100 mAh.g-1。观察结果表明Na1.0Li0.2Mn0.7Ti0.