Patent ID: 6120841
Filing Date: 2000-09-19
Classification: D01F

Abstract:
A method of making an activated fabric of carbon fibers, the method comprising the steps that consist in providing a fabric of fibers of a carbon-precursor cellulose material, impregnating the fabric with a composition containing at least one inorganic ingredient having a function of promoting dehydrating of cellulose, and performing heat treatment on the impregnated fabric at a temperature which is sufficient to cause the precursor cellulose to be transformed essentially into carbon, and obtaining a fabric of carbon fibers; the method being characterized in that the heat treatment consists n raising temperature at a speed lying in the range 1.degree. C./min to 15.degree. C./min followed by keeping the temperature constant in the range 350.degree. C. to 500.degree. C., and followed by a step of washing the fabric, thereby directly obtaining an activated fabric of carbon fibers having a specific surface area of not less than 600 m.sup.2 /g, without subsequent activation treatment at a higher temperature.