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AssigneeUnist Academy-Industry Research Corporation
InventorsIn Yup Jeon, Jong Haom Baek
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The present invention relates to a method of preparing a nitrogen-doped graphene comprising preparing a Edge-Functionalized Graphene by binding a graphite with a organic material having amino groups and functional groups such as carboxy acid group through an electrophilic substitution reaction, and heat treating the resultant Edge-Functionalized Graphene, and a nitrogen-doped graphene prepared thereby. According to the present invention, by a more inexpensive and simpler method, a nitrogen-doped graphene can be prepared at higher purity and higher yield. The nitrogen-doped graphene obtained by the present invention has very excellent physical and electric properties, and particularly has a superior oxygen reduction capability, compared with the platinum catalyst used at cathode of a H2/O2 fuel cell so that it will replace the platinum to lower more the cost of a H2/O2 fuel cell or to increase its life and further to provide a new turning point for the commercialization of a H2/O2 fuel cell.
A method of preparing nitrogen doped-graphene comprising 1) reacting an organic material having one or more amino groups and one or more functional groups selected from the group consisting of carboxylic acid group, amide group, sulfonic acid group, carbonylchloride group and carbonylbromide group with graphite in a reaction medium containing polyphosphoric acid and phosphorus pentoxide-, thereby the graphite being exfoliated with the functional group of the organic material grafted to the graphite to prepare organic material-grafted graphene;
Dependencies are inferred from the claim text.