fig7

Figure 7. (A) (a) SEM image of Co(OH)₂@CC; (b) ORR performance of CoP and commercial Pt/C; (c) Discharge polarization curve and corresponding power density in ZABs^[52]. Copyright 2017, the Royal Society of Chemistry. (B) (a) SEM image of Co₃FeN nanosheets; (b) LSV curves of different samples for ORR; (c) Discharge polarization curves and corresponding power density curves of different samples^[54]. Copyright 2019, the Royal Society of Chemistry. (C) (a) SEM image of Re-Ni₃S₂/NG/NF; (b) ORR polarization curves of samples; (c) Charge/discharge polarization curves and power density plots Re-Ni₃S₂/NG/NF and Pt/C + IrO₂/NF based ZABs^[55]. Copyright 2022, Elsevier. (D) (a) SEM image of Pt/NBF-ReS₂/Mo₂CT_x; (b) ORR and OER polarization curves of the different samples; (c) Discharge polarization curves and related power density plots in ZABs^[57]. Copyright 2021, Elsevier.