| 摘要 |
PURPOSE:To increase passage area in which electrolyte comes in contact with gas to obtain a fuel cell having high charge-discharge efficiency by forming a reaction layer comprising powder formed by arranging hydrophilic material and water repellent material both having fibrous structure. CONSTITUTION:A gas diffusion electrode 1 consists of only a reaction layer 5 formed by mixing a mixture 3 of hydrophilic carbon black 2 and water repellent carbon black both having fibrous structure and polytetrafluoroethylene to arrange in a specified direction, and by sintering. The reaction layer has large passage area in which electrolyte comes in contact with gas. Thereby, sufficient reaction is carried out, large current can be passed in charge and discharge, and charging time is shortened, and charge-discharge efficiency is also increased. |
