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Origin of cathodic degradation and new phase formation at the La0.9Sr0.1MnO3/YSZ interface
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Hee Y. | - |
dc.contributor.author | Oh, Seung M. | - |
dc.date.accessioned | 2009-07-16 | - |
dc.date.available | 2009-07-16 | - |
dc.date.issued | 1999-02-12 | - |
dc.identifier.citation | Solid State Ionics 90 (1996) 133 | en |
dc.identifier.issn | 0167-2738 | - |
dc.identifier.uri | https://hdl.handle.net/10371/5649 | - |
dc.description.abstract | New phase formation at the La0.9Sr0.1MnO3/YSZ interface and its effects on the cathodic performances were studied at 900 °C in air. The resistance caused by the interfacial product layer kept increasing with time to reach up to 40% of the total resistance after 500 h. The interfacial product was identified as La2Zr2O7 by XRD measurement. The electrical conductivity of La2Zr2O7 (2.4 × 10−5 S cm−1 at 1000 °C), measured by AC impedance and current interruption methods, was 4 to 7 orders of magnitude smaller than those of La0.9Sr0.1MnO3 electrode or YSZ electrolyte. Either the electronic conductivity or the electrochemical O2 reduction activity of La2Zr2O7 was negligible. Combining these results, a conclusion was made that the cathodic degradation comes mainly from the growth of interfacial product layer and its contribution to the cell resistance increment is ohmic in nature. | en |
dc.description.sponsorship | Fundings for this work were provided by the Ssang Yong Cement Industrial Co. (Korea). | en |
dc.language.iso | en | en |
dc.publisher | Elsevier | en |
dc.subject | Lanthanum zirconate | en |
dc.subject | Cathode degradation in SOFC | en |
dc.subject | Ohmic losses | en |
dc.subject | AC impedance | en |
dc.subject | Current interruption | en |
dc.title | Origin of cathodic degradation and new phase formation at the La0.9Sr0.1MnO3/YSZ interface | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 이희영 | - |
dc.contributor.AlternativeAuthor | 오승모 | - |
dc.identifier.doi | 10.1016/S0167-2738(96)00408-0 | - |
dc.citation.journaltitle | Solid State Ionics | - |
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