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. 2022 Aug 11;14:162. doi: 10.1007/s40820-022-00890-w

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — a Schematic diagram of rechargeable Zn-air batteries. b Open-circuit plots of rechargeable Zn-air batteries. c Charge and discharge polarization curves. d Discharge polarization curves and corresponding power density curves. e Galvanostatic discharge-charge cycling curves. f Photo of a lit LED powered by two Zn-air batteries of CoNP@FeNC-0.05 as cathode catalysts in series