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The fabrication of a bifunctional oxygen electrode without carbon components for alkaline secondary batteries

Price, Stephen, Thompson, Stephen, Li, Xiaohong, Gorman, Scott, Pletcher, Derek, Russell, Andrea, Walsh, Frank and Wills, Richard (2014) The fabrication of a bifunctional oxygen electrode without carbon components for alkaline secondary batteries Journal of Power Sources, 259, pp. 43-49. (doi:10.1016/j.jpowsour.2014.02.058).

Record type: Article

Abstract

The fabrication of a gas diffusion electrode (GDE) without carbon components is described. It is therefore suitable for use as a bifunctional oxygen electrode in alkaline secondary batteries. The electrode is fabricated in two stages (a) the formation of a PTFE-bonded nickel powder layer on a nickel foam substrate and (b) the deposition of a NiCo2O4 spinel electrocatalyst layer by dip coating in a nitrate solution and thermal decomposition. The influence of modifications to the procedure on the performance of the GDEs in 8 M NaOH at 333 K is described. The GDEs can support current densities up to 100 mA cm?2 with state-of-the-art overpotentials for both oxygen evolution and oxygen reduction. Stable performance during >50 successive, 1 h oxygen reduction/evolution cycles at a current density of 50 mA cm?2 has been achieved.

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Accepted/In Press date: 15 February 2014
e-pub ahead of print date: 26 February 2014
Published date: 14 August 2014
Keywords: Carbon free gas diffusion electrode (GDE), bifunctional electrode, oxygen evolution/reduction, alkaline
Organisations: Engineering Science Unit, Electrochemistry

Identifiers

Local EPrints ID: 364125
URI: http://eprints.soton.ac.uk/id/eprint/364125
ISSN: 0378-7753
PURE UUID: 9de19bd7-4d9e-4794-8344-0b8130c15ccf

Catalogue record

Date deposited: 07 Apr 2014 08:07
Last modified: 18 Jul 2017 02:35

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Contributors

Author: Stephen Price
Author: Stephen Thompson
Author: Xiaohong Li
Author: Scott Gorman
Author: Derek Pletcher
Author: Andrea Russell
Author: Frank Walsh
Author: Richard Wills

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