High-entropy alloy nanoparticles anchored on N-doped carbon as oxygen reduction electrocatalysts for zinc-air batteries.

The high-entropy alloy electrocatalyst (RuNiFeCoMn/NC) enables a high peak power density of 192 mW cm-2 and maintains stable cycling performance for over 5000 cycles at 5 mA cm-2 for application of zinc-air batteries. The quasi-solid-state flexible battery is also stable under different bending conditions.