fig4
Figure 4. (A) Electrochemical performances of ZABs assembled with catalysts. Schematic diagram of a ZAB; (B) Discharge specific capacity curves at current density of 20 mA cm-2, (C) open-circuit voltages, (D) discharge polarization curves, and the power densities of Meso/Micro-FeNC+Ir/C and Pt/C+Ir/C; (E) Galvanostatic long-term charge and discharge profiles of Meso/Micro-FeNC+Ir/C and Pt/C+Ir/C. ZABs: Zinc-air batteries; Meso/Micro-FeNC: meso/microporous Fe/N-codoped carbon.
