US EPA

5930078 

Journal Article 

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

Wong, CPauP; Yang, TCK; Chong, S; Juan, JC; Pan, GT; Huang, CM 

2019 

Yes 

Ionics
ISSN: 0947-7047
EISSN: 0388-659X 

25 

4 

1689-1698 

10.1007/s11581-019-02913-w 

WOS:000468282200025 

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 (-0.8V for 480s followed by -0.9V for 240s and annealed at 400 degrees C for 2h) 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 6M KOH. After 1000cycles, sample 04 exhibited excellent cycling stability, with an overall potential gap of 0.75V. 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 itsporous structure. 

MnCoOx; Zn-O-2 battery; Bifunctional electrocatalyst; Potentiostatic electrodeposition