Hollow Porous Hierarchical-Structured 0.5Li2MnO3·0.5LiMn0.4Co0.3Ni0.3O2as a High-Performance Cathode Material for Lithium-Ion Batteries.
We report a novel hollow porous hierarchical-architectured 0.5Li2MnO3·0.5LiMn0.4Co0.3Ni0.3O2(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-1at 0.2 C), high rate capability (162.6 mAh g-1at 10 C), and excellent cycling stability (237.6 mAh g-1after 100 cycles at 0.5 C and 153.8 mAh g-1after 200 cycles at 10 C). These values are superior to most literature data.
Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong.
Fang
F
Fu
Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong.
Jiayu
J
Tang
Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong.
Yuze
Y
Yao
Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong.
Minhua
M
Shao
cathode; hierarchical architecture; hollow porous structure; lithium-ion batteries; lithium-rich layered oxides; stability