Journal
CERAMICS INTERNATIONAL
Volume 43, Issue -, Pages S633-S638Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.05.224
Keywords
Nanocomposites; Transition metal oxides; Capacitors; Cathodic electrodeposition
Categories
Funding
- National Natural Science Foundation of China [51472172, 11075110]
- Applied Fundamental Foundation of Sichuan Province [2015JY0255]
- Ministry of Science and Technology of China (MOST) [201303934700]
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Flower-like cobalt-nickel binary oxide was prepared as electrode materials for supercapacitors via cathodic electrodeposition. The deposition experiments were performed at the constant potential of -1 V on Ni foam substrate without any surfactant and template. Scanning electron microscopy (SEM) images indicate that the flower-like Co3O4 nano-sheet layers are homogeneously distributed on NiO layer with length of about 200 nm. The as-prepared Co3O4-NiO exhibits a specific capacitance of 687.5 F g(-1) at the current density of 0.5 A g(-1) (vs. Ag/AgCl). Meanwhile, they show excellent rate performance (94% retained from 0.5 A g(-1) to 10 A g(-1)) and outstanding cycle life (92% retained after 2500 cycles). These results indicate that the flower-like cobalt-nickel binary oxide electrode deposited on Ni foam can be considered as a promising candidate for the supercapacitor electrode materials.
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