Electrodeposited Co-Mn oxide composite electrodes for rechargeable Zn-air battery

Wong, Christelle Pau Ping and Yang, Thomas C.-K. and Chong, Siewhui and Juan, Joon Ching and Pan, Guan Ting and Huang, Chao Ming (2019) Electrodeposited Co-Mn oxide composite electrodes for rechargeable Zn-air battery. Ionics, 25 (4). pp. 1689-1698. ISSN 0947-7047

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Official URL: https://doi.org/10.1007/s11581-019-02913-w

Abstract

Porous manganese cobalt oxide (MCO) films were prepared directly on a conductive stainless steel (SS) mesh substrate via electrodeposition and an annealing treatment as composite air electrodes. The electrodeposition time ratio markedly influenced the surface morphological and electrochemical catalytic activities of MCO/SS electrodes. The sample 04 (− 0.8 V for 480 s followed by − 0.9 V for 240 s and annealed at 400 °C for 2 h) exhibited the highest reduction current among all electrodes. The electrochemical catalytic activity of the sample 04 as the air electrode for rechargeable zinc–air batteries was evaluated using galvanostatic charge and discharge cycling measurements in a solution of 6 M KOH. After 1000 cycles, sample 04 exhibited excellent cycling stability, with an overall potential gap of 0.75 V. The excellent performance of MCO/SS electrode in terms of stability and overall potential gap might be due to the ratio of Co oxide and Mn oxide, and its porous structure. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.

Item Type: Article
Uncontrolled Keywords: Bifunctional electrocatalyst; MnCoOx; Potentiostatic electrodeposition; Zn-O2 battery
Subjects: T Technology > TP Chemical technology
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 02 Dec 2019 01:52
Last Modified: 02 Dec 2019 01:52
URI: http://eprints.um.edu.my/id/eprint/23170

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