An efficient, bifunctional catalyst for lithium–oxygen batteries obtained through tuning the exterior Co ²⁺ /Co ³⁺ ratio of CoO x on N-doped carbon nanofibers

This is the authors' abstract. We don't add key points for this paper.

CoO x NPs@N-doped carbon nanofibers were obtained by an electrospinning technique and served as an excellent catalyst for Li–O ₂ cells. The enhanced electrochemical performance can be ascribed to the rich Co ²⁺ toward the ORR and OER on the surface of CoO x .