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Hierarchical ZnO@MnO2 core-shell pillar arrays on ni foam for binder-free supercapacitor electrodes

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Title
Hierarchical ZnO@MnO2 core-shell pillar arrays on ni foam for binder-free supercapacitor electrodes
Author
Huang, MingLi, FeiZhao, Xiao LiLuo, DaYou, Xue QiuZhang, Yu Xin ZLi, Gang
Issue Date
2015-01
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
ELECTROCHIMICA ACTA, v.152, pp.172 - 177
Abstract
Hierarchical ZnO@MnO2 core-shell pillar arrays on Ni foam have been fabricated by a facile two-step hydrothermal approach and further investigated as the binder-free electrode for supercapacitors. The core-shell hybrid nanostructure is achieved by decorating ultrathin self-standing MnO2 nanosheets on ZnO pillar arrays grown radically on Nickel foam. This unique well-designed binder-free electrode exhibits a high specific capacitance (423.5 F g-1 at a current density of 0.5 A g-1), and excellent cycling stability (92% capacitance retention after 3000 cycles). The improved electrochemical results show that the ZnO@MnO2 core-shell nanostructure electrode is promising for high-performance supercapacitors. The facile design of the unique core-shell array architectures provides a new and effective approach to fabricate high-performance binder-free electrode for supercapacitors.
URI
https://scholarworks.unist.ac.kr/handle/201301/9484
URL
https://www.sciencedirect.com/science/article/pii/S0013468614023469?via%3Dihub
DOI
10.1016/j.electacta.2014.11.127
ISSN
0013-4686
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