複合粒子により作製された SOFC カソードの電極特性評価

The composite particles were prepared by one-step mechanical processing of the starting raw powders of La0.8Sr0.2MnO3 （LSM） and scandia stabilized zirconia （ScSZ） fine particles. In this paper, volume percentage of ScSZ in composite particles was set as 50 vol％ and 62 vol％, respectively. The SOFC ca...

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Bibliographic Details
Published inFuntai Kogakkaishi Vol. 53; no. 6; p. 380
Main Authors Kondo, Akira, Cheng-Yen, Hsu, Kozawa, Takahiro, Naito, Makio
Format Journal Article
LanguageJapanese
Published Kyoto Japan Science and Technology Agency 01.01.2016
Subjects
Cathodes
Cathodic polarization
Impedance
Particulate composites
Sintering
Sintering (powder metallurgy)
Zirconium dioxide
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ISSN0386-6157
1883-7239
DOI10.4164/sptj.53.380

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Summary:The composite particles were prepared by one-step mechanical processing of the starting raw powders of La0.8Sr0.2MnO3 （LSM） and scandia stabilized zirconia （ScSZ） fine particles. In this paper, volume percentage of ScSZ in composite particles was set as 50 vol％ and 62 vol％, respectively. The SOFC cathodes using the composite particles were prepared by sintering at 1200℃. Sintering time was selected as 2h and 3h. As results of electrochemical examinations by AC impedance measurements, the increased content of ScSZ （62 vol％） and the shorter sintering time （2h） contributed to improving the polarization resistance （Rp） of cathodes. Three factors such as conductivity of oxygen ion, formation of triple phase boundaries and gas diffusivity were discussed for the improvement of Rp using the Bode plots which showed the relationship between the absolute value of imaginary part of impedance and the frequency.
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ISSN:0386-6157
1883-7239
DOI:10.4164/sptj.53.380