Porous electrode substrate and method for producing the same
AssigneeMitsubishi Rayon Co., Ltd.
InventorsKazuhiro Sumioka, Yoshihiro Sako
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Abstract
The present invention provides a porous electrode substrate that has low production cost, high mechanical strength, thickness precision, and surface smoothness, and sufficient gas permeability and electrical conductivity, and a method for producing the same. In the present invention, for example, a porous electrode substrate that includes short carbon fibers (A) joined together via three-dimensional mesh-like carbon fibers (B) is produced by a method including a step (1) of dispersing short carbon fibers (A), and short carbon fiber precursors (b) to be fibrillated by beating, to produce a precursor sheet; and a step (2) of subjecting the precursor sheet to carbonization treatment at a temperature of 1000° C. or higher.
Claims23
A method for producing a porous electrode substrate, comprising:
- (1) dispersing short carbon fibers (A), and short carbon fiber precursors (b), to obtain a precursor sheet;
- and
- (2) treating the precursor sheet in a carbonization treatment at a temperature of 1000° C. or higher,
- wherein the short carbon fiber precursors (b) are in the form of sea-island composite fibers, capable of fibrillation by beating, and comprise two or more different polymers.
A porous electrode substrate comprising short carbon fibers (A) that are dispersed in a two-dimensional plane and are joined together via only three-dimensional mesh-like carbon fibers (B), wherein the three-dimensional mesh-like carbon fibers (B) are derived from short carbon fiber precursors (b) which are in the form of sea-island composite fibers, capable of fibrillation by beating and comprise two or more different polymers.
Dependencies are inferred from the claim text.