期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 43, 期 32, 页码 15348-15357出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.06.079
关键词
NiCo2O4-NF; Hierarchical structure; Binder-free; Supercapacitors; Electrochemical performance
资金
- National Science Foundation of China [21601079, 51473074, 21771095]
- Shandong Provincial Natural Science Foundation [ZR2016EMQ06, ZR2017JL013]
- National Students' platform for innovation and entrepreneurship training program [201710447034]
A facile method of directly growing NiCo2O4 hybrid hierarchical nanostructures on nickel foam is developed by a hydrothermal and post heat-treatment method without using any surfactant, stabilizer or organic binder. Due to the rich porous nanostructures, relative large specific surface area (177.71 m(2) g(-1)) of the NiCo2O4 hybrid structure and efficient electrical contact with the conductive nickel substrate, the NiCo2O4-NF hybrid electrode shows significantly enhanced specific capacitance (3105.1 F g(-1) at 1 A g(-1)), outstanding rate properties (1621.3 F g(-1) at 20 A g(-1) and 1191.5 F g(-1) at 50 A g(-1)) and high energy density (95.26 Wh kg(-1)). This facile and effective design method opens up new possibilities for producing binder-free electrodes in high-performance electrochemical supercapacitors and miniaturized devices. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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