Influence of surface/interface on the performance of MIEC cathode for SOFC

H. Sato; K. Yashiro; M. Sasaki; S. Hashimoto; T. Nakamura; K. Amezawa; T. Kawada

doi:10.1149/06101.0037ecst

Influence of surface/interface on the performance of MIEC cathode for SOFC

H. Sato, K. Yashiro, M. Sasaki, S. Hashimoto, T. Nakamura, K. Amezawa, T. Kawada

ENV - Environmental Studies for Advanced Society

Research output: Contribution to journal › Article › peer-review

Abstract

La_0.6Sr_0.4CoO₃ (LSC40) has been studied as an SOFC cathode. It is reported that the oxygen reduction reaction was enhanced at hetero-interface of LSC40 and La_1.5Sr_0.5CoO ₄ (LSC155). Relationship between the electrode performance and the surface chemistry was elucidated to find out the mechanism of the heterointerface effect. Thin film electrodes of LSC40, LSC155, and double-layer electrode of LSC155-on-LSC40 were fabricated by pulsed laser deposition. The electrode performance was measured by impedance measurement. LSC40 electrode degraded during the measurement, and enrichment of strontium was observed at the surface of the degraded LSC40 by EDX analysis. On the other hand, the segregation of strontium was suppressed on the doublelayer electrode, whose electrode performance was relatively higher than that of LSC40 single-phase electrode. It implies that the layered LSC155 may suppress the electrode degradation.

Original language	English
Pages (from-to)	37-46
Number of pages	10
Journal	ECS Transactions
Volume	61
Issue number	1
DOIs	https://doi.org/10.1149/06101.0037ecst
Publication status	Published - 2014

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Engineering(all)

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title = "Influence of surface/interface on the performance of MIEC cathode for SOFC",

abstract = "La0.6Sr0.4CoO3 (LSC40) has been studied as an SOFC cathode. It is reported that the oxygen reduction reaction was enhanced at hetero-interface of LSC40 and La1.5Sr0.5CoO 4 (LSC155). Relationship between the electrode performance and the surface chemistry was elucidated to find out the mechanism of the heterointerface effect. Thin film electrodes of LSC40, LSC155, and double-layer electrode of LSC155-on-LSC40 were fabricated by pulsed laser deposition. The electrode performance was measured by impedance measurement. LSC40 electrode degraded during the measurement, and enrichment of strontium was observed at the surface of the degraded LSC40 by EDX analysis. On the other hand, the segregation of strontium was suppressed on the doublelayer electrode, whose electrode performance was relatively higher than that of LSC40 single-phase electrode. It implies that the layered LSC155 may suppress the electrode degradation.",

author = "H. Sato and K. Yashiro and M. Sasaki and S. Hashimoto and T. Nakamura and K. Amezawa and T. Kawada",

year = "2014",

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T1 - Influence of surface/interface on the performance of MIEC cathode for SOFC

AU - Sato, H.

AU - Yashiro, K.

AU - Sasaki, M.

AU - Hashimoto, S.

AU - Nakamura, T.

AU - Amezawa, K.

AU - Kawada, T.

PY - 2014

Y1 - 2014

N2 - La0.6Sr0.4CoO3 (LSC40) has been studied as an SOFC cathode. It is reported that the oxygen reduction reaction was enhanced at hetero-interface of LSC40 and La1.5Sr0.5CoO 4 (LSC155). Relationship between the electrode performance and the surface chemistry was elucidated to find out the mechanism of the heterointerface effect. Thin film electrodes of LSC40, LSC155, and double-layer electrode of LSC155-on-LSC40 were fabricated by pulsed laser deposition. The electrode performance was measured by impedance measurement. LSC40 electrode degraded during the measurement, and enrichment of strontium was observed at the surface of the degraded LSC40 by EDX analysis. On the other hand, the segregation of strontium was suppressed on the doublelayer electrode, whose electrode performance was relatively higher than that of LSC40 single-phase electrode. It implies that the layered LSC155 may suppress the electrode degradation.

AB - La0.6Sr0.4CoO3 (LSC40) has been studied as an SOFC cathode. It is reported that the oxygen reduction reaction was enhanced at hetero-interface of LSC40 and La1.5Sr0.5CoO 4 (LSC155). Relationship between the electrode performance and the surface chemistry was elucidated to find out the mechanism of the heterointerface effect. Thin film electrodes of LSC40, LSC155, and double-layer electrode of LSC155-on-LSC40 were fabricated by pulsed laser deposition. The electrode performance was measured by impedance measurement. LSC40 electrode degraded during the measurement, and enrichment of strontium was observed at the surface of the degraded LSC40 by EDX analysis. On the other hand, the segregation of strontium was suppressed on the doublelayer electrode, whose electrode performance was relatively higher than that of LSC40 single-phase electrode. It implies that the layered LSC155 may suppress the electrode degradation.

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Influence of surface/interface on the performance of MIEC cathode for SOFC

Abstract

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