期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 39, 页码 25654-25659出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b09118
关键词
lithium-rich layered oxides; hollow porous structure; hierarchical architecture; cathode; stability; lithium-ion batteries
资金
- Hong Kong University of Science and Technology
We report a novel hollow porous hierarchical-architectured 0.5Li(2)MnO(3)center dot 0.5LiMn(0.4)Co(0.3)Ni(0.3)O(2) (LLO) for lithium-ion batteries (LIBs). The obtained lithium-rich layered oxides possess a large inner cavity, a permeable porous shell, and excellent structural robustness. In LIBs, such unique features are favorable for fast Li+ transportation and can provide sufficient contact between active materials and electrolytes, accommodate more Li+, and improve the kinetics of the electrochemical reaction. The as-prepared LLO displays an extremely high initial discharge capacity (296.5 mAh g(-1) at 0.2 C), high rate capability (162.6 mAh g(-1) at 10 C), and excellent cycling stability (237.6 mAh g(-1) after 100 cycles at 0.5 C and 153.8 mAh g(-1) after 200 cycles at 10 C). These values are superior to most literature data.
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