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

The fabrication of a bifunctional oxygen electrode without carbon components for alkaline secondary batteries
The fabrication of a bifunctional oxygen electrode without carbon components for alkaline secondary batteries
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.
Carbon free gas diffusion electrode (GDE), bifunctional electrode, oxygen evolution/reduction, alkaline
0378-7753
43-49
Price, Stephen
5d3310d0-cf30-45e6-ba44-4bf87ade3b8d
Thompson, Stephen
46677911-01d9-478e-ad98-87ac37cd56a6
Li, Xiaohong
ea8135d4-1bd7-4771-85cd-eb8f2a264654
Gorman, Scott
165a7220-6829-4b26-ae4d-f8e80e6a0853
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Russell, Andrea
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c
Price, Stephen
5d3310d0-cf30-45e6-ba44-4bf87ade3b8d
Thompson, Stephen
46677911-01d9-478e-ad98-87ac37cd56a6
Li, Xiaohong
ea8135d4-1bd7-4771-85cd-eb8f2a264654
Gorman, Scott
165a7220-6829-4b26-ae4d-f8e80e6a0853
Pletcher, Derek
f22ebe69-b859-4a89-80b0-9e190e6f8f30
Russell, Andrea
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Walsh, Frank
309528e7-062e-439b-af40-9309bc91efb2
Wills, Richard
60b7c98f-eced-4b11-aad9-fd2484e26c2c

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, 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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More information

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: https://eprints.soton.ac.uk/id/eprint/364125
ISSN: 0378-7753
PURE UUID: 9de19bd7-4d9e-4794-8344-0b8130c15ccf
ORCID for Andrea Russell: ORCID iD orcid.org/0000-0002-8382-6443

Catalogue record

Date deposited: 07 Apr 2014 08:07
Last modified: 06 Jun 2018 12:58

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Contributors

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

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