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HWAHAK KONGHAK,
Vol.32, No.1, 113-120, 1994
Vol.32, No.1, 113-120, 1994
연료전지 전극에서의 기체 확산
Gas Diffusion in the Porous Electrode of Fuel Cell
연료전지 전극의 제조방법 및 촉매층 지지체로 쓰이는 탄소종이의 종류가 전극의 기공구조 및 기체 확산에 미치는 영향을 살펴보고 인산형 반쪽전지를 통하여 연료전지 성능과의 관계를 고찰하였다. 실험결과 전극에서의 기체 흐름은 air sintering한 전극보다 hot press한 전극에서 상대적으로 더 Kundsen 흐름에 접근하는 것으로 나타났으며 전극의 성능은 산소 투과 플럭스가 클수록 양호한 것으로 나타났다.
For a fuel cell electrode, pore structure and gas diffusion were studied with different electrode fabrication methods and with different carbon papers used as catalyst layer support. And the fuel cell performance of each electrode was examined in the phosphoric acid half cell. Experimental results showed that the gas flow approached to Knudsen flow relatively more in the hot pressed electrode than in the air sintered electrode and that the higher oxygen flux permeated in the electrode gave the better cathode performance.
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