Amorphous Co[sbnd]Mn binary oxides loaded on porous carbon nanosheet as bifunctional electrocatalysts for rechargeable zinc-air battery
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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2023-08-15
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en
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Journal of Energy Storage, Volume 65
Abstract
Rechargeable zinc-air battery (RZAB) is very promising for large-scale energy storage whereas is impeded by the sluggish oxygen reduction/evolution reactions (ORR/OER). Developing high-performance yet cost-effective ORR/OER bifunctional catalysts is critical to accelerating its market penetration. Here, amorphous Co[sbnd]Mn binary oxides loaded on porous carbon nanosheets are prepared by a facile photochemical metal- organic deposition method. The evolution of composition, microstructure, ORR/OER performance with the calcination temperature is systematically investigated. The amorphous CoMn2Ox supported on carbon nanosheets shows higher ORR/OER bifunctional electrochemical performance in terms of activity and stability. The resultant RZAB with the amorphous CoMn2Ox on carbon nanosheets as air electrode delivers a peak power density of 89.6 mW cm−2 and maintains stable operation for ∼500 cycles at 10 mA cm−2. The ORR/OER bifunctional performance is closely associated with the microstructure, oxidation states of Co/Mn species and their corresponding proportions. Although there is great room to performance enhancement, this work sheds light on the development of high-performance and cheap ORR/OER bifunctional catalysts for rechargeable metal-air batteries by engineering the crystallinity of the metal oxides.Description
Funding Information: This work was funded by the National Natural Science Foundation of China (Grant No. 51702230 ). Publisher Copyright: © 2023 Elsevier Ltd
Keywords
Amorphous materials, Co-Mn oxide, Oxygen evolution reaction, Oxygen reduction reaction, Zn-air battery
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Zhao, L, Li, Y & Zhang, C 2023, ' Amorphous Co[sbnd]Mn binary oxides loaded on porous carbon nanosheet as bifunctional electrocatalysts for rechargeable zinc-air battery ', Journal of Energy Storage, vol. 65, 107303 . https://doi.org/10.1016/j.est.2023.107303