Developing a facile method to construct 3D hierarchical CoMoO4@C@MnO2 core-shell structure aligned on Ni foam with enhanced pseudocapacitive performances

作者：Cui, Xiao; Chen, Xinli; Zhang, Wenjie; Yan, Xiaoqing; Wang, Ming; Lian, Jiancong; Zheng, Zhuan; Deng, Hong^*

来源：Journal of Alloys and Compounds, 2017, 695: 2109-2116.

DOI：10.1016/j.jallcom.2016.11.053

• Supercapacitors
• CoMoO4@C@MnO2 nanorod arrays
• Core-shell heterostructure

Metal oxides with hierachical three-dimensional (3D) superstructure, which integrate large surface area with high electrical conductivity, have been regarded as desirable and ideal electrode materials for supercapacitors. In this work, 3D hierarchical CoMoO4@C@MnO2 core-shell nanorod arrays (NRAs) on nickel foam were fabricated by a facile and stepwise hydrothermal approach. The morphologies of CoMoO4 and CoMoO4@C@MnO2 were explicitly investigated. The CoMoO4@C@MnO2 based electrodes exhibited excellent capacitive performances. In comparison to the specific capacitance of CoMoO4 (1080 F g(-1) at a current density of 3 A g(-1) and 82% retained capacitance over 5000 cycles) The CoMoO4@C@MnO2 based electrodes showed improved performance, delivering specific capacitance up to 1824 F g(-1) at 3 A g(-1) and 86% retained capacitance over 5000 cycles. The results establish that the binder-free CoMoO4@C@MnO2 is a promising candidate for high performance electrochemical supercapacitors.

• 出版日期2017-2-25
• 单位华南师范大学