Li Chunliu, Zhao Banglei, Yang Junfeng, Zhang Linchao, Fang Qianfeng, Wang Xianping
Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China.
Science Island Branch, Graduate School of University of Science and Technology of China, Hefei 230026, China.
Nanomaterials (Basel). 2021 Nov 27;11(12):3223. doi: 10.3390/nano11123223.
LiZrO-coated and Al-doped micro-sized monocrystalline LiMnO powder is synthesized through solid-state reaction, and the electrochemical performance is investigated as cathode materials for lithium-ion batteries. It is found that LiZrO-coated LiAlMnO delivers a discharge capacity of 110.90 mAhg with 94% capacity retention after 200 cycles at room temperature and a discharge capacity of 104.4 mAhg with a capacity retention of 87.8% after 100 cycles at 55 °C. Moreover, LiZrO-coated LiAlMnO could retain 87.5% of its initial capacity at 5C rate. This superior cycling and rate performance can be greatly contributed to the synergistic effect of Al-doping and LiZrO-coating.
通过固态反应合成了LiZrO包覆和Al掺杂的微米级单晶LiMnO粉末，并研究了其作为锂离子电池正极材料的电化学性能。研究发现，LiZrO包覆的LiAlMnO在室温下200次循环后放电容量为110.90 mAh/g，容量保持率为94%；在55℃下100次循环后放电容量为104.4 mAh/g，容量保持率为87.8%。此外，LiZrO包覆的LiAlMnO在5C倍率下可保持其初始容量的87.5%。这种优异的循环和倍率性能很大程度上归因于Al掺杂和LiZrO包覆的协同效应。
