| 초록 |
Pore size distribution and pore volume in the catalyst layer of PEMFCs were modified by controlling the temperature during the catalyst layer fabrication. Raising the temperature of the gas diffusion layer facilitated evaporation of the solvent in the catalyst ink and induced a large pore volume especially in the secondary pore. Electrodes with large amounts of pores exhibit 30 % improved single cell performance. The micro-structure and electrochemical properties of electrodes were investigated by FESEM, mercury intrusion porosimetry, EIS, and current-voltage polarization measurement. The results indicate that increased volume of the secondary pore reduces the mass transfer resistance. |
