Engineering cobalt nitride nanosheet arrays with rich nitrogen defects as a bifunctional robust oxygen electrocatalyst in rechargeable Zn–air batteries

The CoN-Nd nanosheet with nitrogen defects was synthesized by solvothermal and low-temperature nitridation as a high-efficiency OER and ORR electrocatalyst for rechargeable Zn-air batteries. The excellent performance is attributed to the unique structure providing abundant active sites, faster charge transfer rate, electrolyte diffusion rate and gas release.