||인산 도핑 PBI계 막전극접합체를 적용한 고온형 수소연료전지의 전기화학적 내구성 연구
||The Electrochemical Performance Evaluation of PBI-based MEA with Phosphoric Acid Doped Cathode for High Temperature Fuel Cell
||High temperature polymer electrolyte membrane fuel cell(고온형 연료Membrane Electrode Assembly (MEA 막전극전합체), Polybenzimidazole(PBI), Phosphoric acid(인산)
||JUNKI RHEE1, CHANMIN LEE1, YUKWON JEON1, HONG YEON LEE1, SANG SUN PARK1, TAE YOUNG KIM2, HEESEON KIM3, SOONHO SONG3, JUNG OCK PARK2, YONG-GUN SHUL1,†
A proton exchange membrane fuel cell (PEMFC) operated at 150℃
was evaluated by a controlling different amount of phosphoric acid (PA) to a
membrane-electrode assembly (MEA) without humidification of the cells. The effects
on MEA performance of the amount of PA in the cathode are investigated.
The PA content in the cathodes was optimized for higher catalyst utilization. The
highest value of the active electrochemical area is achieved with the optimum
amount of PA in the cathode confirmed by in-situ cyclic voltammetry. The current
density-voltage experiments (I-V curve) also shows a transient response of cell
voltage affected by the amount of PA in the electrodes. Furthermore, this information
was compared with the production variables such as hot pressing and
vacuum drying to investigate those effect to the electrochemical performances.