fig4

From: In situ growth of B, N-doped Fe₃C-encapsulated carbon nanotubes on wood-derived carbon for high-performance Zn-air battery electrocatalysts

<i>In situ</i> growth of B, N-doped Fe<sub>3</sub>C-encapsulated carbon nanotubes on wood-derived carbon for high-performance Zn-air battery electrocatalysts

Figure 4. (A) Schematic of aqueous ZABs; (B) OCV of ZABs based on Fe₃C@BNC and 20% Pt/C+RuO₂; the inset displays a photograph of the as-assembled ZABs; (C) Discharge polarization curves and corresponding power density plots of ZABs with Fe₃C@BNC and 20% Pt/C+RuO₂ electrodes; (D) Discharge voltage profiles of Fe₃C@BNC and 20% Pt/C+RuO₂ ZABs at various current densities; (E) Specific capacity comparison of ZABs with Fe₃C@BNC and 20% Pt/C+RuO₂; (F) Photograph of light-emitting diodes (≈3.0 V) powered by two liquid ZABs connected in series; (G) Cyclic stability of ZABs with Fe₃C@BNC and 20% Pt/C+RuO₂ electrodes. ZABs: Zn-air batteries; OCV: open-circuit voltage; BNC: B, N-doped porous carbon.