Hierarchical LiMn2O4 Hollow Cubes with Exposed {111} Planes as High-Power Cathodes for Lithium-Ion Batteries

作者：Wu, Yu; Cao, Chuanbao^*; Zhang, Junting; Wang, Lin; Ma, Xilan; Xu, Xingyan

来源：ACS Applied Materials & Interfaces, 2016, 8(30): 19567-19572.

DOI：10.1021/acsami.6b06820

• hierarchical
• hollow cubes
• LiMn2O4
• exposed -{111} planes
• superior electrochemical performance
• lithium-ion batteries

Hierarchical LiMn2O4 hollow cubes with exposed {111} planes have been synthesized using cube-shaped MnCO3 precursors, which are fabricated through a facile co precipitation reaction. Without surface modification, the as prepared LiMn2O4 exhibits excellent cyclability and superior rate capability. Surprisingly, even over 70% of primal discharge capacity can be maintained for up to 1000 cycles at 50 C, and with only about 72 s of discharge time the as-prepared materials can deliver initial discharge capacity of 96.5 mA h g-1. What is more, the materials have 98.4% and 90.7% capacity retentions for up to 100 cycles at 5 C under the temperatures of 25 and 60 degrees C, respectively. The superior electrochemical performance can be attributed to the unique hierarchical and interior hollow structure, exposed {111} planes, and high-quality crystallinity.

• 出版日期2016-8-3
• 单位北京理工大学