Micro-nanostructured CuO/C spheres as high-performance anode materials for Na-ion batteries

作者：Lu, Yanying; Zhang, Ning; Zhao, Qing; Liang, Jing; Chen, Jun^*

来源：Nanoscale, 2015, 7(6): 2770-2776.

DOI：10.1039/c4nr06432a

• ELECTROCHEMICAL PERFORMANCE
• FACILE FABRICATION
• CARBON NANOFIBERS
• ENERGY-STORAGE
• POROUS CARBON
• GAS-SENSOR
• LONG-LIFE
• LITHIUM
• NANOCOMPOSITES
• MORPHOLOGY

In this paper, we report on the synthesis of micro-nanostructured CuO/C spheres by aerosol spray pyrolysis and their application as high-performance anodes in sodium-ion batteries. Micro-nanostructured CuO/C spheres with different CuO contents were synthesized through aerosol spray pyrolysis by adjusting the ratio of reactants and heat-treated by an oxidation process. The as-prepared CuO/C spheres show uniformly spherical morphology, in which CuO nanoparticles (similar to 10 nm) are homogeneously embedded in the carbon matrix (denoted as 10-CuO/C). The electrochemical performance of 10-CuO/C with a carbon weight of 44% was evaluated as the anode material for Na-ion batteries. It can deliver a capacity of 402 mA h g(-1) after 600 cycles at a current density of 200 mA g(-1). Furthermore, a capacity of 304 mA h g(-1) was obtained at a high current density of 2000 mA g(-1). The superior electrochemical performance of the micro-nanostructured CuO/C spheres leads to the enhancement of the electronic conductivity of the nanocomposite and the accommodation of the volume variation of CuO/C during charge/discharge cycling.

• 出版日期2015
• 单位南开大学