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AssigneeOcean University of China
InventorsHaibo Xu, Yonghong Lu
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The invention relates to an oxygen and nitrogen co-doped polyacrylonitrile-based carbon fiber and a preparation method thereof. The oxygen and nitrogen co-doped polyacrylonitrile-based carbon fiber is prepared by electrochemical modification of a raw-material polyacrylonitrile-based carbon fiber, such that the surface thereof 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 inherently contained in the raw-material polyacrylonitrile-based carbon fiber by means of electrochemical modification. The method for preparing the oxygen and nitrogen co-doped polyacrylonitrile-based carbon fiber comprises the following steps: placing the raw-material polyacrylonitrile-based carbon fiber in an electrolyte solution, subjecting it to cyclic treatment between electrochemical oxidation and electrochemical reduction, and thus obtaining the oxygen and nitrogen co-doped polyacrylonitrile-based carbon fiber. The oxygen and nitrogen co doped polyacrylonitrile based carbon fiber of the present invention has both the pseudo capacitive properties for oxidation reduction reactions and electrocatalytic properties for the cathodic oxygen reduction reaction.
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,
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