PURPOSE: To make it possible to manufacture electrode base material which is bulky and has good performance by forming a knit with fire resistant multifilament, and heating the fire resistant knit to obtain the carbon fiber knit for electrode base material.
CONSTITUTION: Multifilament of fire resistant fiber which is the precursor of carbon fiber is prepared. The multifilament is obtained by heating raw multifilament, capable of forming carbon fiber through fire resistant and carbonizing treatment, such as polyacrylic fiber, cellulose fiber, pitch fiber in an oxydizing atmosphere at 150∼400°C without catching fire. The fire resistant multifilament obtained is used to form a knit by conventional process. The fire resistant knit is heated in an inactive atmosphere such as nitrogen atmosphere at 950∼3000°C and carbonized or graphitized to obtain carbon fiber knit. By this process, an electrode base material can be obtained.
NISHIZUMI SHINZO
SHIMIZU KAZUHARU
Next Patent: MANUFACTURE OF ELECTRODE CATALYST LAYER FOR FUEL CELL