Directional preparation of cobalt oxide nanoflakes grown on cobalt nanowires as composite cathode for high-performance alkaline batteries

作者：Ma, Hong^*; Liu, Xiufeng; Zhang, Dong; Xiang, Jiayuan^*

来源：Materials Research Bulletin, 2017, 96: 306-310.

DOI：10.1016/j.materresbull.2017.02.019

• Porous materials
• Thin films
• Alkaline batteries
• Metal oxides
• Energy storage and conversion

Synthesis of multicomponent core/branch arrays is important for development of advanced energy storage devices. Herein we fabricate porous CoO@Co core/branch arrays by successive hydrothermal+ electrodeposition methods CoO nanoflakes branch is uniformly coated on the Co nanowire core forming composite core/branch arrays (CBAs). The CoO@Co CBAs possess combined properties of highly porous structure and strong mechanical stability. As cathode for alkaline batteries, the obtained CoO@Co CBAs exhibit good electrochemical performances with high a capacity of 91.5 mAh g(-1) at 1 Ag-1 and stable high-rate cycling life (73.5 mAh g(-1) after 12,000 cycles at 10 Ag-1). The hierarchical core/branch architecture provides positive roles in the enhancement of electrochemical properties with fast electronic transportation path, and short diffusion channels of ions. Our finding offers a new way to construct high-performance cathode of alkaline batteries.

• 出版日期2017-12
• 单位山东师范大学