| 摘要 |
There are provided an electrode for fuel cells including a catalyst layer containing a benzoxazine monomer, a catalyst and a binder, and a fuel cell employing the electrode. The electrode for fuel cells contains an even distribution of benzoxazine monomer, which is a hydrophilic (or phosphoric acidophilic) material and dissolves in phosphoric acid but does not poison catalysts, thereby improving wetting capability of phosphoric acid (H 3 PO 4 ) within electrodes and thus allowing phosphoric acid to permeate first into micropores in electrodes. As a result, flooding, that is, liquid phosphoric acid existing in large amount within the electrodes, inhibits gas diffusion which occurs when phosphoric acid permeates into macropores in electrodes, is efficiently prevented, thereby increasing three-phase interfacial area of gas (fuel gas or oxidized gas)-liquid (phosphoric acid)-solid (catalyst). Therefore, the fuel cell employing the electrode can operate under the condition of high-temperature and non-humidification and demonstrate improved cell performance. |
