Spinel NixCo2-xO4 as a bifunctional air electrode for zinc-air batteries

  1. Get@NRC: Spinel NixCo2-xO4 as a bifunctional air electrode for zinc-air batteries (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1149/04529.0105ecst
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Proceedings titleBatteries and Energy Technology (General) – 221st ECS Meeting
Series titleECS Transactions; Volume 45
Conference221st ECS Meeting, Symposium on Batteries and Energy Technology Joint General Session, May 6-10, 2012, Seattle, WA, USA
Pages105112; # of pages: 8
SubjectAir 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
AbstractSpinel 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.
Publication date
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NPARC number21270416
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Record identifier51d1d748-0eb0-4674-9e1f-e8f7edd90e26
Record created2014-02-10
Record modified2016-05-09
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