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HWAHAK KONGHAK,
Vol.36, No.6, 856-862, 1998
Vol.36, No.6, 856-862, 1998
용융탄산염 연료전지의 Ni-Al2O3 Anode 전극개발에 관한 연구
Development of Ni-Al2O3 Anodes for Molten Carbonate Fuel Cell
용융탄산염 연료전지의 수소전극(anode)의 소결과 creep을 해결하기 위하여, creep 저항성이 큰 것으로 알려진 Al2O3에 Ni을 담지하여 anode를 제조하였다. 전극의 분석은 SEM, XRD, 4-point probe method, creep test 및 half cell text에 의해 수행되었다. Ni전극에 첨가된 Al2O3는 creep저항성을 향상시켜 주었으며, 담지법으로 제조된 Ni-Ni/A12O3 anode는 높은 전기전도도와 전극 성능을 나타내어, 새로운 담지법에 의한 Al2O3 첨가 Ni전극의 대체전극으로의 가능성을 확인할 수 있었다. 반면 Cu는 우수한 전기전도성에도 불구하고, 담지시에는 낮은 반응성을 나타냈다.
A12O3 known for creep resistant material was doped with Ni by newly developed impregnation method. The nickel-doped Al2O3(Ni/Al2O3) powder which was mixed with Ni powder was used for the preparation of anodes(designated as Ni-Ni/ Al2O3). The prepared anodes were characterized by means of SEM, XRD, and creep test. Anode performance tests were carried out by potentiodynamic polarization technique using a MCFC half cell. With an increase of Ni impregnation, electric conductivity of the Ni-Ni/Al2O3 anode was increased and the existence of Al2O3 improved creep resistance. In the half cell test, Ni-Ni/A12O3 showed a good performance comparable to 100 % pure Ni anode. Anodes made of Cu-im-pregnated Ni-Cu/Al2O3, powder showed both lower electric conductivity and activity performance compared with those of Ni-Ni/Al2O3 .
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