초록 ▼

A porous electrode substrate for fuel cell and a process for producing the same, which contains 35 to 60% carbonized resin by weight, and has pores with a mean pore size of 20 to 60 mm2. Then, the press molded product is carbonized by heat treatment under a temperature of 1300°to 3000°C. in an inert

A porous electrode substrate for fuel cell and a process for producing the same, which contains 35 to 60% carbonized resin by weight, and has pores with a mean pore size of 20 to 60 mm2. Then, the press molded product is carbonized by heat treatment under a temperature of 1300°to 3000°C. in an inert atmosphere or in vacuum to obtain an electrode substrate excellent in various characteristics such as gas permeability, flexural strength, compression strength, etc. Further, for improvement of electroconductivity, it is preferable to use a mixture of a curable resin and a non-curable resin as the resin impregnated into the carbon fiber mat.

대표청구항 ▼

A porous electrode substrate for fuel cell comprising short carbon fibers dispersed in random directions within substantially 2-dimensional plane and carbonized resin for mutually bonding said carbon fibers, the individual fiber of said carbon fibers having a diameter of from 4 to 9 m3 to 20 mm, the

A porous electrode substrate for fuel cell comprising short carbon fibers dispersed in random directions within substantially 2-dimensional plane and carbonized resin for mutually bonding said carbon fibers, the individual fiber of said carbon fibers having a diameter of from 4 to 9 m3 to 20 mm, the content of said carbonized resin being in the range of from 35 to 60% by weight, said substrate having pores with a mean pore size of from 20 to 60 m60 to 80%, and a compression ratio not more than 20%.