Stacked CuSe nanoplates with 2D nanochannels as high performance anode for lithium batteries.

Transition metal chalcogenides are considered as promising alternative materials for lithium-ion batteries owing to their relatively high theoretical capacity. However, poor cycle stability combined with low rate capacity still hinders their practical applications. In this work, the Cu-N chemical bonding directed the stacking CuSe nanoplates (DETA-CuSe) is developed to solve this issue. Such unique structure with small nanochannels can enhance the reactive site, facilitate the Li-ion transport as well as inhibit the structural collapse. Benefitting of these advantages, the DETA-CuSe exhibits high specific capacity, better rate capacity and long cyclability with the specific capacities of 565mAhg after 100 cycles at 200 mA g and 368mAhg after 500 cycles at 5000 mA g. This novel DETA-CuSe structure with nanochannels is promising for next generation energy storage and the synthetic process can be extended to fabricate other transition metal chalcogenides with similar structure.