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HWAHAK KONGHAK,
Vol.32, No.1, 86-94, 1994
Vol.32, No.1, 86-94, 1994
알칼리형 연료전지에서 은촉매를 사용한 산소전극 성능에 관한 연구
An Investigation on Performance of Oxygen Electrode with Silver Catalyst for Alkaline Fuel Cell
은염의 환원으로 제조한 촉매와 PTFE 분말을 사용하여 이층구조를 갖는 다공성 산소전극을 제작하였다. 촉매층의 최적 PTFE 분말 첨가량은 15w/t%였다. Ag-Bi-Ni-Ti 촉매 제조시 Bi, Ni, Ti dopant 의 첨가량은 각각 2 wt%가 가장 적절하였으며, 이 촉매로 제조한 전극은 상당히 안정한 전극성능을 보였다. 촉매층의 기공도를 향상시키기 위해서 ammonium bicarbonate(ABC)를 첨가하였다. ABC의 첨가로 전극성능이 향상되었는데, 최적첨가량은 2 wt%였다.
Double-layered porous oxygen electrode was manufactured with silver catalyst made by reduction of the silver salt and PTFE powder. The optimum PTFE powder content in catalyst layer was 15wt%. Ag-Bi-Ni-Ti catalyst containing dopants of 2wt% Bi, Ni, Ti showed the best catalytic activity, and this electrode exhibited stable electrode performance. In order to increase the porosity of catalyst layer, ammonium bicarbonate(ABC) was added. The electrode performance was improved by addition of ABC, and the optimum amount of ABC to catalyst layer was 2wt%.
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