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Zinc–air battery performance. a) Polarization curve and corresponding power density plots of Zinc–air battery with FeCoNiRu‐HESAC in place of cathodes. The inset shows the photograph of the assembled Zinc–air battery with an open‐circuit voltage of 1.393 V. b) Galvanostatic discharge plot of assembled Zinc–air battery. The insets show the photograph of a 3.0 V LED panel powered by two series‐connected Zinc–air batteries with an open‐circuit voltage of 2.96 V, displaying the ‘HKQAI’.
