A novel bifunctional oxygen GDE for alkaline secondary batteries
Date
2013Author
Li, Xiaohong
Pletcher, Derek
Russell, Andrea E.
Walsh, Frank C.
Wills, Richard G.A.
Gorman, Scott F.
Price, Stephen W.T.
Thompson, Stephen J.
Date issued
2013
Journal
Electrochemistry Communications
Type
Article
Language
en
Publisher
Elsevier for International Society of Electrochemistry (ISE)
Rights
Copyright © 2013 The Authors. Published by Elsevier. Open Access under a Creative Commons license (https://creativecommons.org/licenses/by/3.0/)
Abstract
This paper describes a novel procedure for the fabrication of a gas diffusion electrode (GDE) suitable for use as a bifunctional oxygen electrode in alkaline secondary batteries. The electrode is fabricated by pre-forming a PTFE-bonded nickel powder layer on a nickel foam substrate followed by deposition of NiCo2O4 spinel electrocatalyst by dip coating in a nitrate solution and thermal decomposition. The carbon-free composition avoids concerns over carbon corrosion at the potentials for oxygen evolution. The electrode shows acceptable overpotentials for both oxygen evolution and oxygen reduction at current densities up to 100 mA cm−2. Stable performance during >100 successive, 1 h oxygen reduction/evolution cycles at a current density of 20 mA cm−2 in 8 M NaOH at 333 K was achieved.
Funders/Sponsor
European Commission
Description
Open Access article
Citation
Vol. 34, pp. 228 - 230
Grant number
256759
ISSN
1388-2481