Cobalt Phthalocyanine-Doped Polymer-Based Electrocatalyst for Rechargeable Zinc-Air Batteries

Rechargeable zinc-air batteries (RZAB) have gained significant attention as potential energy storage devices due to their high energy density, cost-effectiveness, and to the fact that they are environmentally safe. However, the practical implementation of RZABs has been impeded by challenges such as...

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Bibliographic Details
Published in:	Materials 2023-07, Vol.16 (14), p.5105
Main Authors:	Kumar, Yogesh, Akula, Srinu, Kibena-Põldsepp, Elo, Käärik, Maike, Kozlova, Jekaterina, Kikas, Arvo, Aruväli, Jaan, Kisand, Vambola, Leis, Jaan, Tamm, Aile, Tammeveski, Kaido
Format:	Article
Language:	eng
Subjects:	Batteries Carbon Catalysts Chemical reduction Cobalt Commercialization electrocatalysis Electrocatalysts Electrodes Energy storage Imidazole Metal air batteries Morphology Nitrogen nitrogen doping non-precious metal catalyst oxygen evolution reaction Oxygen evolution reactions oxygen reduction reaction Oxygen reduction reactions Phloroglucinol phloroglucinol-formaldehyde network Phthalocyanins Polymer industry Polymers Potential energy Rechargeable batteries Scanning electron microscopy Software Spectrum analysis Technology application Temperature X-rays Zinc Zinc-oxygen batteries
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Summary:	Rechargeable zinc-air batteries (RZAB) have gained significant attention as potential energy storage devices due to their high energy density, cost-effectiveness, and to the fact that they are environmentally safe. However, the practical implementation of RZABs has been impeded by challenges such as sluggish oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), including poor cyclability. Herein, we report the preparation of cobalt- and nitrogen-doped porous carbon derived from phloroglucinol-formaldehyde polymer networks with 2-methyl imidazole and cobalt phthalocyanine as precursors for nitrogen and cobalt. The CoN-PC-2 catalyst prepared in this study exhibits commendable electrocatalytic activity for both ORR and OER, evidenced by a half-wave potential of 0.81 V and of 1.70 V. Moreover, the catalyst demonstrates outstanding performance in zinc-air batteries, achieving a peak power density of 158 mW cm and displaying excellent stability during charge-discharge cycles. The findings from this study aim to provide valuable insights and guidelines for further research and the development of hierarchical micro-mesoporous carbon materials from polymer networks, facilitating their potential commercialisation and widespread deployment in energy storage applications.
ISSN:	1996-1944 1996-1944