Porous electrode substrate, method for producing the same, membrane electrode assembly, and polymer electrolyte fuel cell
- 申请公布号：
- US8927173(B2)
- 申请号：
- US201313892561
- 申请日期：
- 2013.05.13
- 申请公布日期：
- 2015.01.06
- 申请人：
- Mitsubishi Rayon Co., Ltd.
- 发明人：
- Sumioka Kazuhiro;Sako Yoshihiro
- 分类号：
- H01M4/96;H01M4/86;H01M8/02;D04H1/4242;D04H1/4382;D21H13/50;H01B1/12;H01M4/92;H01M8/10;D21H15/02
- 主分类号：
- H01M4/96
- 代理机构：
- Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 代理人：
- Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 地址：
- Tokyo JP
- 摘要：
- Provided is a porous electrode substrate having high mechanical strength, good handling properties, high thickness precision, little undulation, and adequate gas permeability and conductivity. Also provided is a method for producing a porous electrode substrate at low costs. A porous electrode substrate is produced by joining short carbon fibers (A) via mesh-like of carbon fibers (B) having an average diameter of 4 μm or smaller. Further provided are a membrane-electrode assembly and a polymer electrolyte fuel cell that use this porous electrode membrane. A porous electrode substrate is obtained by subjecting a precursor sheet, in which short carbon fibers (A) and short carbon fiber precursors (b) having an average diameter of 5 μm or smaller have been dispersed, to carbonization treatment after optional hot press forming and optional oxidization treatment.
- 主权项：
- 1. A porous electrode substrate comprising short carbon fibers which are not directly bonded, but joined via mesh carbon fibers having an average diameter of 4 μm or smaller,
wherein the mesh carbon fibers are derived from short carbon fiber precursors obtained by cutting long carbon fiber precursors.
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