Fig. 5: Performance of AEMFCs and Zn − air batteries.
From: Interfacial assembly of binary atomic metal-Nx sites for high-performance energy devices

a H2-O2 AEMFC performance of FeCo-NCH and control samples. b H2-Air (CO2 free) AEMFC performance of FeCo-NCH and control samples. c Optical image of an LED light array powered by two Zn−air batteries in series using FeCo-NCH as the air cathode. d Discharge polarization curves and corresponding power density curves of FeCo-NCH-based Zn–air battery and control samples. e Discharge curves of the FeCo-NCH-based Zn–air battery at current densities of 2, 5, 10, 25, 50, and 2 mA cm−2 for 120 min with each step being 20 min. f Discharge curves of FeCo-NCH-based Zn–air battery at 5 mA cm−2 for 100 h.