| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an inexpensive, high output fuel cell in which the problem wherein operation cannot be made because of high current density in a direct methanol type fuel cell is solved and the problem of the permeation/swelling of fuel is canceled, and to provide an electrolyte membrane electrode junction body used for the fuel cell. <P>SOLUTION: In the electrolyte membrane electrode junction body, a fuel electrode (an anode) is set to be hydrophilic, an oxidizing agent electrode (a cathode) is set to be hydrophobic, and a foundation layer that has properties suitable for each electrode and is made of conductive powder and a binder is formed between the diffusion layer of the electrode and a catalyst layer. The direct methanol fuel cell incorporates a structure, where affinity to the water of the electrode is created according to each electrode and the electrolyte membrane is sandwiched, thus improving catalyst efficiency and increasing performance as compared with before. Additionally, a film, where the pore of a porous base material is filled with polymer having proton conductivity, is used instead of plyperfluoroalkyle sulfonic acid-based electrolyte membrane conventionally used for the electrolyte membrane for fuel cells, thus further increasing the performance in the direct methanol fuel cell. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
