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).

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Description/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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.jpowsour.2014.02.058
ISSNs: 0378-7753 (print)
Keywords: Carbon free gas diffusion electrode (GDE), bifunctional electrode, oxygen evolution/reduction, alkaline
Subjects: T Technology > TP Chemical technology
Organisations: Engineering Science Unit, Electrochemistry
ePrint ID: 364125
Date :
Date Event
15 February 2014Accepted/In Press
26 February 2014e-pub ahead of print
14 August 2014Published
Date Deposited: 07 Apr 2014 08:07
Last Modified: 17 Apr 2017 13:57
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/364125

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