fig5

Figure 5. (A) A schematic configuration of the homemade Zn-air battery; (B) Comparison of polarization and power density curves using Pt/C and COP_MCT-Co-900 as catalysts; (C) Open circuit plot of the Zn-air battery using COP_MCT-Co-900 and Pt/C as catalysts; (D) Cycle discharge curves of COP_MCT-Co-900-driven Zn-air batteries at periodically changed current density; (E) Discharge/charge cycling performance of Zn-air batteries with COP_MCT-Co-900 as catalyst at a current density of 10 mA·cm^-2. COP: Covalent organic polymer.