Preparation and Performance of Grade-layer Composite Cathode for SOFCs

doi:10.3724/SP.J.1077.2007.00885

Abstract

Abstract: The cathode on Ce_0.8Sm_0.2O_1.9 (SDC) electrolyte was fabricated by a spray method. The composite phases in these materials of Sm_0.5Sr_0.5CoO₃(SSC)-Ce_0.8Sm_0.2O_1.9(SDC) were proved by X-ray diffraction. The microstructure shows that cathode contacts well with electrolyte and there are many pores in the cathode. The results of thermal expansion and resistance measurements show that thermal expansion coefficient increases with the increasing of SSC, whereas the resistance decreases. The results of electrochemical measurement show that the grade-layer composite cathode has better performance than single-layer SSC cathode.

Key words: solid oxide fuel cell, grade-layer composite, cathode, SSC

CLC Number:

TM911

LI Yan,LU Zhe,Wang Hong-Tao,Wang Yue-Hua. Preparation and Performance of Grade-layer Composite Cathode for SOFCs[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2007.00885.

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Preparation and Performance of Grade-layer Composite Cathode for SOFCs

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