Hollow Porous Hierarchical-Structured 0.5Li 2 MnO 3 ·0.5LiMn 0.4 Co 0.3 Ni 0.3 O 2 as a High-Performance Cathode Material for Lithium-Ion Batteries

We report a novel hollow porous hierarchical-architectured 0.5Li MnO ·0.5LiMn Co Ni O (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 at 0.2 C), high rate capability (162.6 mAh g at 10 C), and excellent cycling stability (237.6 mAh g after 100 cycles at 0.5 C and 153.8 mAh g after 200 cycles at 10 C). These values are superior to most literature data.