Patent ID: 8846135
Filing Date: 2014-09-30
Classification: C23C,H01M,Y02E

Abstract:
1. A process for the preparation of carbon layers on powdered supports by pyrolysis of a hydrophilic polymer in an aqueous solution that is applied on a powdered support comprising the steps of; (a) adding 0.1-15 wt % pyromellitic acid or pyromellitic dianhydride to a hydrophilic polymer of 85-99.9 wt % dissolved in water to form a mixture; (b) adding to the mixture 1-99 wt % of a powdered support to form a suspension; (c) concentrating and drying the suspension to form a composite precursor; (d) pyrolyzing the composite precursor at 300-1500° C. to form a carbon layer on the powdered support; wherein the weight percentages are relative to the combined dry weight of pyromellitic acid or pyromellitic dianhydride and hydrophilic polymer; and wherein the carbon layer has mesopores with a diameter distribution peak of about 32-35 Å.