To obtain a porous electrode substrate having sufficient conductivity, that is, a low specific resistance in the thickness direction without using a large amount of energy for removing a solvent, which has been a problem in conventional technologies.
The porous electrode substrate can be manufactured by the method including the steps shown below: (A) a step for obtaining a paper material by subjecting the following (1) to (5) to dispersing and papermaking: (1) a short carbon fiber, (2) a binder staple fiber, (3) phenolic resin particles made of a novolak type phenolic resin, (4) particles made of hexamethylenetetramine and (5) polyethylene pulp; (B) a step for obtaining a paper material having the polyethylene pulp coated with the phenolic resin by heating at the temperature at which the phenolic resin particles melt and the polyethylene pulp does not melt; (C) a step for heating and pressing at a temperature above the glass transition point of a resin composing the polyethylene pulp; and (D) a step for obtaining the porous electrode substrate by carbonizing the phenolic resin.
COPYRIGHT: (C)2010,JPO&INPIT
Shigeru Tagami
Kazuhiro Sumioka
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| JP9157052A |
| WO2006003771A1 |