| 摘要 |
PURPOSE:To enable a homogeneous matrix fully impregnated with electrolyte to be easily made, by placing spacers between a fuel electrode and an oxydant electrode, and filling the space formed by the spacers and the electrodes with a matrix material. CONSTITUTION:Beltlike spacers 4a made of polytetrafluoroethylene are placed on a fuel electrode 5 at given intervals. A matrix material 4b prepared by mixing phosphoric acid with a binding agent such as silicon carbide or polytetrafluoroethylene is filled in a matrix part formed by spacers 4a and catalyst layers 3. After that, an oxydant electrode 6 is placed over the material 4b, and the electrode 6 is pressed by means of a roller, thereby making a homogeneous and continuous matrix 1 without any crack to be formed between the catalyst layers 3. The catalyst layer 3 is formed by applying a mixture consisting of platinum grains held by carbon black or acetylene black, and a binding agent such as polytetrafluoroethylene to an electrode base material 2 such as carbon paper, before the material 2 coated with the mixture is sintered. |
