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Improvement of negative electrodes for iron-air batteries: Comparison of different iron compounds as active materials

Improvement of negative electrodes for iron-air batteries: Comparison of different iron compounds as active materials
Improvement of negative electrodes for iron-air batteries: Comparison of different iron compounds as active materials
For iron-air batteries, it has yet to be established which iron-containing material is the best candidate for producing iron electrodes. Galvanostatic charge-discharge cycling up to a potential of −0.55 V vs. Hg/HgO was carried out for at least 20 cycles on steel mesh-coated hot pressed iron electrodes. Five different iron active materials were tested: carbonyl iron, Fe3O4 (magnetite), Fe2O3 (hematite), FeOOH (goethite) and iron sulfide, resulting in five hot pressed electrodes. In addition, five hot pressed electrodes were prepared using the same iron active materials but with further processing by ball milling. The specific capacity and voltage of the electrodes is compared, where possible, with similar iron electrodes reported in the literature. This paper reports the maximum, mean value and standard deviation of the specific discharge capacity for each electrode; the highest mean discharge capacity was achieved with the ball milled Fe3O4 electrode with a value of 610 mA h g−1Fe. The shortest formation period was observed for the goethite iron electrode, which achieved a maximum discharge capacity after just 3 cycles with a standard deviation of only 9 mA h g−1Fe over 21 cycles.
0013-4651
A107-A117
Rodríguez, H. A. Figueredo
e49f1681-45b4-4828-a217-9a507bb68791
Mckerracher, R. D.
f5f9f0e7-a256-4714-b752-e3bb8dab03fc
De Leόn, C. Ponce
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F. C.
309528e7-062e-439b-af40-9309bc91efb2
Rodríguez, H. A. Figueredo
e49f1681-45b4-4828-a217-9a507bb68791
Mckerracher, R. D.
f5f9f0e7-a256-4714-b752-e3bb8dab03fc
De Leόn, C. Ponce
508a312e-75ff-4bcb-9151-dacc424d755c
Walsh, F. C.
309528e7-062e-439b-af40-9309bc91efb2

Rodríguez, H. A. Figueredo, Mckerracher, R. D., De Leόn, C. Ponce and Walsh, F. C. (2019) Improvement of negative electrodes for iron-air batteries: Comparison of different iron compounds as active materials. Journal of the Electrochemical Society, 166 (2), A107-A117. (doi:10.1149/2.1071816jes).

Record type: Article

Abstract

For iron-air batteries, it has yet to be established which iron-containing material is the best candidate for producing iron electrodes. Galvanostatic charge-discharge cycling up to a potential of −0.55 V vs. Hg/HgO was carried out for at least 20 cycles on steel mesh-coated hot pressed iron electrodes. Five different iron active materials were tested: carbonyl iron, Fe3O4 (magnetite), Fe2O3 (hematite), FeOOH (goethite) and iron sulfide, resulting in five hot pressed electrodes. In addition, five hot pressed electrodes were prepared using the same iron active materials but with further processing by ball milling. The specific capacity and voltage of the electrodes is compared, where possible, with similar iron electrodes reported in the literature. This paper reports the maximum, mean value and standard deviation of the specific discharge capacity for each electrode; the highest mean discharge capacity was achieved with the ball milled Fe3O4 electrode with a value of 610 mA h g−1Fe. The shortest formation period was observed for the goethite iron electrode, which achieved a maximum discharge capacity after just 3 cycles with a standard deviation of only 9 mA h g−1Fe over 21 cycles.

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Final_Improvement of iron electrodes for batteries_submission copy_reviewer_corrections - Accepted Manuscript
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More information

Accepted/In Press date: 18 December 2018
e-pub ahead of print date: 10 January 2019

Identifiers

Local EPrints ID: 432888
URI: http://eprints.soton.ac.uk/id/eprint/432888
ISSN: 0013-4651
PURE UUID: bc3e142e-2f26-454a-9a5a-c25834cff28a
ORCID for C. Ponce De Leόn: ORCID iD orcid.org/0000-0002-1907-5913

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Date deposited: 31 Jul 2019 16:30
Last modified: 22 Nov 2021 02:52

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Contributors

Author: H. A. Figueredo Rodríguez
Author: F. C. Walsh

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