Effect of Fabrication Method of Anode on Performance in Enzyme Fuel Cells

Anode는 효소를 이용한 효소전극과 cathode는 PEMFC용 전극을 이용해 효소연료전지를 구동하였다. 효소 anode는graphite 분말과 효소로서 글루코스 산화제, 전자매개체로 ferrocene을 혼합해 압축해서 만들고 Nafion 이오노머로 코팅하였다. Anode 제조조건을 변화시키며 성능을 측정해 효소 anode 제조 최적조건을 찾았다. 효소 anode 압축 시 최적 압력은 8.89 MPa이고, 효소 anode의 graphite 성분비가 60%일 때 최고의 출력밀도를 나타냈다. Anode 기질 용액의 최적glucose 농도는 1.7mol/l이었다. 효소 anode는 Nafion 용액에 1초, 2회 침지에 의해 안정화되었다. Abstract − Enzyme fuel cells were operated with cells composed of enzyme anode and PEMFC cathode. Enzymeanodes was fabricated by compression of a mixture of graphite particle, glucose oxidase(Gox) as a enzyme and ferro-cene as a redox mediator, and then coated with Nafion ionomer solution. Performances of enzyme unit cell were mea-sured with variation of anode manufacture factors, to find optimum condition of enzyme anode. Optimum pressure was8.89MPa for enzyme anode pressing process. Highest power density was obtained at 60% graphite composition inenzyme anode. Optimum glucose concentration was 1.7 mol/l in anode substrate solution. The enzyme anode was sta-bilized by two times of deeping in Nafion solution for 1 sec.Key words: Enzyme fuel cells, Performance, Pressing Anode, Fabrication method, Glucose oxidase, Stability