UMP Institutional Repository

Continuous Nanobelts of Nickel Oxide–Cobalt Oxide Hybrid With Improved Capacitive Charge Storage Properties

Harilal, Midhun Harilal and Krishnan, Syam G. and Vijayan, Bincy Lathakumary and M. M., Yusoff and Rajan, Jose and Reddy, M. Venkatashamy and Adams, Stefan and Barron, Andrew R. (2017) Continuous Nanobelts of Nickel Oxide–Cobalt Oxide Hybrid With Improved Capacitive Charge Storage Properties. Materials and Design, 122. pp. 376-384. ISSN 0264-1275

[img] PDF
Continuous Nanobelts of Nickel Oxide.pdf - Published Version
Restricted to Repository staff only

Download (2MB) | Request a copy

Abstract

This paper reports the synthesis of continuous nanobelts, whose thickness is less than half of its pore diameter, of a material hybrid composing of nanograins of nickel oxide and cobalt oxide by electrospinning technique and their capacitive charge storage properties. While the constituent binary metal oxides (NiO and Co3O4) formed solid cylindrical nanofibers the hybrid and a stoichiometric compound in the Ni-Co-O system, i.e., spinel-type NiCo2O4, formed as thin nanobelts due to the magnetic interaction between nickel and cobalt ions. The nanobelts showed six-fold larger surface area, wider pores, and impressive charge storage capabilities compared to the cylindrical fibres. The hybrid nanobelts showed high specific capacitance (CS ~ 1250 F g− 1 at 10 A g− 1 in 6 M KOH) with high capacity retention, which is appreciably larger than found for the stoichiometric compound (~ 970 F g− 1 at 10 A g− 1). It is shown that the hybrid nanobelts have lower internal resistance (1.3 Ω), higher diffusion coefficient (4.6 × 10− 13 cm2 s− 1) and smaller relaxation time (0.03 s) than the benchmark materials studied here.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Nanocomposites; Hybrid metal oxides; Energy storage devices; Renewable energy; Electrochemical charge storage
Subjects: Q Science > Q Science (General)
Faculty/Division: Faculty of Industrial Sciences And Technology
Depositing User: Prof. Dr. Mashitah Mohd Yusoff
Date Deposited: 08 Feb 2018 06:44
Last Modified: 26 Jul 2018 07:46
URI: http://umpir.ump.edu.my/id/eprint/19809
Download Statistic: View Download Statistics

Actions (login required)

View Item View Item