Title:
GAS DIFFUSION ELECTRODE AND ITS MANUFACTURE
Document Type and Number:
Japanese Patent JP3108760
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a gas diffusion electrode with low cost and high performance by adding a surfactant having an ionic dissociation group to a gas diffusion electrode comprising carbon black and Teflon, used in a solid polymer fuel cell.
SOLUTION: An ionic surfactant has a hydrophobic group and a hydrophilic group dissociating in ions in a molecule, a surfactant having ionic dissociation groups at both ends of a hydrophobic group can be used in addition to a surfactant having a general structure bonding a pair of hydrophobic group and hydrophilic group. Preferably, a surfactant with high thermal stability and high degree of dissociation of ionic dissociation group, for example an ionic surfactant having a perfluoroalkyl group as a hydrophobic group, specifically perfluoro alkanesulfonic acid is used. Performance equivalent to that obtained when commercial Nafion solution is impregnated is provided.
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Inventors:
Kazuaki Yasuda
Jun Shiroma
Keisuke Oguro
Hiroyuki Takenaka
Zenpachi Kokumi
Jun Shiroma
Keisuke Oguro
Hiroyuki Takenaka
Zenpachi Kokumi
Application Number:
JP10664897A
Publication Date:
November 13, 2000
Filing Date:
April 08, 1997
Export Citation:
Assignee:
Director of Industrial Technology
International Classes:
H01M4/86; H01M4/88; H01M4/90; H01M8/10; (IPC1-7): H01M4/86; H01M4/88; H01M4/90; H01M8/10
Domestic Patent References:
| JP62196389A | ||||
| JP896812A |
Attorney, Agent or Firm:
220000323 Osaka Institute of Industrial Technology, Institute of Industrial Technology