AUTHOR=Wan Houzhao , Li Lang , Zhang Jun , Liu Xiang , Wang Hanbin , Wang Hao 

TITLE=Nickel Nanowire@Porous NiCo2O4 Nanorods Arrays Grown on Nickel Foam as Efficient Pseudocapacitor Electrode

JOURNAL=Frontiers in Energy Research

VOLUME=5

YEAR=2017

URL=https://www.frontiersin.org/journals/energy-research/articles/10.3389/fenrg.2017.00033

DOI=10.3389/fenrg.2017.00033

ISSN=2296-598X

ABSTRACT=<p>A three dimensional hierarchical nanostructure composed of nickel nanowires and porous NiCo<sub>2</sub>O<sub>4</sub> nanorods arrays on the surface of nickel foam is successfully fabricated by a facile route. In this structure, the nickel nanowires are used as core materials to support high-pseudocapacitance NiCo<sub>2</sub>O<sub>4</sub> nanorods and construct the well-defined NiCo<sub>2</sub>O<sub>4</sub> nanorods shell/nickel nanowires core hierarchical structure on nickel foam. Benefiting from the participation of nickel nanowires, the nickel nanowire@NiCo<sub>2</sub>O<sub>4</sub>/Ni foam electrode shows a high areal specific capacitance (7.4 F cm<sup>−2</sup> at 5 mA cm<sup>−2</sup>), excellent rate capability (88.04% retained at 100 mA cm<sup>−2</sup>), and good cycling stability (74.08% retained after 1,500 cycles). The superior electrochemical properties made it promising as electrode for supercapacitors.</p>