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Review Article

Cobalt-based oxygen electrocatalysts for zinc-air batteries: Recent progress, challenges, and perspectives

Dongfang Chen1,§( ), Lyuming Pan1,2,§, Pucheng Pei1( ), Xin Song1, Peng Ren1, Lu Zhang1,3
State Key Lab of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
School of Mechanical-Electronic and Vehicle Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China

§ Dongfang Chen and Lyuming Pan contributed equally to this work.

Show Author Information

Graphical Abstract

The synthesis methods, catalytic activity, and catalytic mechanism of various cobalt-basedelectrocatalysts are reviewed and evaluated, and strategies for developing high activity cobalt-basedelectrocatalysts for rechargeable zinc-air batteries are summarized and discussed.

Abstract

With the rapid economic growth and the deepening awareness of sustainable development, the demand for green and efficient energy storage equipment increases. As a promising energy storage and conversion device, zinc-air batteries (ZABs) have the advantages of high theoretical specific energy density, low cost, and environmental friendliness. Nevertheless, the efficiency of ZABs is closely related to the electrocatalytic capacity of the air electrode due to its sluggish kinetics for oxygen reduction and evolution reaction (ORR/OER). Therefore, it is necessary to develop efficient catalysts to promote the reaction rate. Recently, cobalt-based materials have become a research hotspot for oxygen electrocatalysts owing to their rich natural content, high catalytic activity, and stability. In this review, the mechanisms of the OER/ORR reaction process, the catalyst's performance characterization, and the various combination methods with the current collector are systematically introduced and analyzed. Further, a broad overview of cobalt-based materials used as electrocatalysts for ZABs is presented, including cobalt-based perovskite, cobalt-nitrogen-carbon (Co-N-C) materials, cobalt oxides, cobalt-containing composite oxides, and cobalt sulfides/phosphides. Finally, various strategies for developing efficient electrocatalysts for ZABs are summarized, highlighting the challenges and future perspectives in designing novel catalysts.

Keywords

zinc-air batteriescobalt-based oxygen electrocatalystscatalytic activitycycle stabilityelectrocatalyst development strategies

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Nano Research
Volume 15 Issue 6,
June 2022
Pages 5038-5063
DOI: 10.1007/s12274-022-4154-4
Cite this article:
Chen D, Pan L, Pei P, et al. Cobalt-based oxygen electrocatalysts for zinc-air batteries: Recent progress, challenges, and perspectives. Nano Research, 2022, 15(6): 5038-5063. https://doi.org/10.1007/s12274-022-4154-4
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Received: 19 November 2021
Revised: 02 January 2022
Accepted: 12 January 2022
Published: 28 March 2022
© Tsinghua University Press 2022
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