期刊
ELECTROCHIMICA ACTA
卷 152, 期 -, 页码 172-177出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.11.127
关键词
Hierarchical; Zinc oxide; Manganese dioxide; Core-shell; Supercapacitors
资金
- National Natural Science Foundation of China [51104194, 51104121]
- National Key laboratory of Fundamental Science of Micro/Nano-device and System Technology (Chongqing University) [2013MS06]
- Fundamental Research Funds for the Central Universities (Chongqing University, PR China) [CDJZR14135501]
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 Ag-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. (C) 2014 Elsevier Ltd. All rights reserved.
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