| DOI | Trouver le DOI : https://doi.org/10.1149/04529.0105ecst |
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| Auteur | Rechercher : Yuan, Xiao Zi1; Rechercher : Qu, Wei1; Rechercher : Zhang, Xinge1; Rechercher : Yao, Peter1; Rechercher : Fahlman, Jason1 |
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| Affiliation | - Conseil national de recherches du Canada. Énergie, les mines et l'environnement
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| Format | Texte, Article |
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| Conférence | 221st ECS Meeting, Symposium on Batteries and Energy Technology Joint General Session, May 6-10, 2012, Seattle, WA, USA |
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| Sujet | Air electrodes; Cycling properties; Electrocatalytic properties; Oxygen evolution reaction; Oxygen reduction reaction; Rotating ring-disk electrode; Transfer pathway; Zinc-air battery; Design; Electrolytic reduction; Sol-gel process; X ray diffraction; Electrodes |
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| Résumé | Spinel NixCo2-xO4 powder was prepared through a sol-gel method and characterized by X-ray diffraction (XRD). The electrocatalytic properties of NixCo2-xO4/C composites towards the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were studied using rotating ring-disk electrode (RDE) technique and Koutecky-Levich theory in 1 M, 3M, and 6 M KOH electrolytes. The results show that the synthesized spinel NixCo2- xO4 exhibits activities for both ORR and OER. The OER Tafel slope is around 60mVdec -1 at a low overpotential, and the ORR process is dominated by a 4-electron transfer pathway. Cell test demonstrates that the ORR activity of non-carbon NixCo2-xO4 air electrode reached 56mA cm -2 at a potential of 0.9V and the OER activity reached 62mA cm -2 at a potential of 2.2V for the first cycle However, the ORR cycling property is not satisfying due to flooding issues. This can probably be solved by an advanced air electrode design. Copyright 2013 by The Electrochemical Society. |
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| Date de publication | 2013 |
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| Série | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21270416 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 51d1d748-0eb0-4674-9e1f-e8f7edd90e26 |
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| Enregistrement créé | 2014-02-10 |
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| Enregistrement modifié | 2020-04-22 |
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