Patent ID: 9683314
Date: 2017-06-20
CPC Classifications: C07D,D01F,D10B,H01M

Claim:
1. An oxygen and nitrogen co-doped polyacrylonitrile-based carbon fiber, prepared by electrochemical modification of a raw-material polyacrylonitrile-based carbon fiber such that its surface has an active layer formed by oxygen-containing active functional groups and nitrogen-containing active functional groups, wherein the nitrogen-containing active functional groups are obtained by activation of the doped nitrogen inherent in the raw-material polyacrylonitrile-based carbon fiber by the electrochemical modification, wherein the nitrogen-containing active functional groups comprise 2-pyridone and/or 2-hydroxyl pyridine, wherein the oxygen-containing active functional groups have reversible redox reactivity, and wherein the nitrogen-containing active functional groups have electrocatalytic activity for cathodic oxygen reduction, wherein the electrochemical modification comprises the steps of: