fig8

Figure 8. (A) (a) SEM image of BHZ-48; (b) ORR LSV curves for comparison of different samples; (c) Charge and discharge polarization curves^[58]. Copyright 2020, Springer Nature. (B) (a) SEM image of FeNi LDH-TpF6-2; (b) FT-IR spectra; (c) Discharge and charge polarization and power density curves^[59]. Copyright 2023, Wiley-VCH. (C) (a) SEM image of Co-CNNs-0.7; (b) ORR polarization curves for various catalysts; (c) Polarization and power density curves^[60]. Copyright 2020, the Royal Society of Chemistry. (D) (a) TEM image of BP-CN-c; (b) P L_2,3-edge XANES spectra of BP, BP-CN-p, and BP-CN-c; (c) Discharge/charge polarization curves of ZABs assemble with BP-CN-c and Pt/C+RuO₂^[62]. Copyright 2021, Wiley-VCH.