Patent ID: 6118650
Filing Date: 2000-09-12
Classification: D01F,H01G,Y02E,Y02T

Abstract:
Mesophase pitch-based activated carbon fibers which are obtained by milling infusibilized mesophase pitch fibers as they are or after carbonizing at a temperature of 350 to 1,000.degree. C., to an average particle diameter of 5 to 50 .mu.m and then activating in the presence of an alkali metal compound, wherein said mesophase pitch-based activated carbon fibers have a ratio Bv/Av of 0.01 to 0.25 in which Av is a total pore volume of pores having a radius of 0.4 to 1.5 nm, said pore volume being measured by a MP method using nitrogen adsorption, and Bv is a total pore volume of pores having a radius of 3.5 to 6 nm, said pore volume being measured by a mercury porosimeter.