Patent ID: 8480930
Filing Date: 2013-07-09
Classification: B01J,C01B,C04B,H01G,Y02E,Y02P

Abstract:
1. A method for preparing carbon aerogels comprising: mixing phloroglucinol with furfural wherein the phloroglucinol and the furfural are mixed in a ratio of 1:3 to 1:2, and dissolving the resultant mixture in a solvent selected from a group consisting of primary alcohol, secondary alcohol, tertiary alcohol, acetone and tetrahydrofuran to form a sol solution wherein the phloroglucinol and the solvent are mixed in a ratio of 1:300 to 1:100, wherein the sol solution is gel at temperature of 20-30° C. under atmospheric pressure; substituting the solvent in thus obtained gels with liquid carbon dioxide, followed by drying in a supercritical state, to form aerogels; and heat treating thus obtained aerogels in an electric furnace under inert atmosphere at a temperature of at least 600° C. to obtain carbon aerogels having a specific surface area of 700 m 2 /g to 1,200 m 2 /g and a capacitance of 200 F/g to 400 F/g.