Porous nanorods of nickel-cobalt double hydroxide prepared by electrochemical co-deposition for high-performance supercapacitors.

Author(s) Wei, Z.; Yuan, J.; Tang, S.; Wu, D.; Wu, L.
Journal J Colloid Interface Sci
Date Published 2019 Apr 15
Abstract

Nickel-cobalt double hydroxides (Ni-Co DHs) combined with cost-effectively commercial expanded graphite (EG) was prepared via a facile in-situ electrodeposition in mixed solvents of N,N-dimethylformamide and water. By simply adjust molar ratios of Ni/Co, a Ni-Co DHs/EG electrode in which Ni-Co DHs showing a porous-nanorod microstructure was fabricated. Thanks to synergistic effects between Ni(OH) and Co(OH) as well as the unique morphology of porous nanorods, an optimal Ni-Co DHs/EG electrode with a total mass loading of 4.0 mg cm can deliver a specific capacitance of 1246 F g at 1 A g, a rate capability of 91.8% as the discharging current density increasing from 1 to 10 A g, and a capacitance retention of 80.1% after 1000 cycles charged/discharged at 10 A g. Thus we can draw a conclusion that the Ni-Co DHs/EG electrode possesses a satisfactory specific capacitance, extremely superior rate performance, and good cycle stability, therefore it can be very competitive for practical applications in supercapacitors.

DOI 10.1016/j.jcis.2019.01.114
ISSN 1095-7103
Citation Wei Z, Yuan J, Tang S, Wu D, Wu L. Porous nanorods of nickel-cobalt double hydroxide prepared by electrochemical co-deposition for high-performance supercapacitors. J Colloid Interface Sci. 2019;542:15-22.

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