Construction of hollow urchin-like carbon frameworks with Co, P, and N doping and encapsulated Co/Co2P heterojunction as bifunctional electrocatalysts for rechargeable Zn–air batteries

A hollow urchin-like bifunctional oxygen electrocatalyst is developed for rechargeable Zn–air batteries by assembling P, N-doped carbon nanotubes with confined Co/Co 2 P heterojunctions on heteroatom-doped carbon hollow spheres.