Preparation and Performance of La0.7Sr0.15Ca0.15Co1-xFexO3-δ as the Cathode Material for SOFC

Jian Bo Liu; Wen Yuan Gao; Qing He Han; Yang Yang Jing; Hao Wen Yang; Zhiqiang Hu; Yan Yan Jiang

doi:10.4028/www.scientific.net/AMR.608-609.913

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 608-609Preparation and Performance of...

Preparation and Performance of La_0.7Sr_0.15Ca_0.15Co_1-xFe_xO_3-δ as the Cathode Material for SOFC

Abstract:

La_0.7Sr_0.15Ca_0.15Co_1-xFe_xO_3-δ (x=0.1、0.2、0.3、0.4) powders for the applications as the cathode materials in solid oxide fuel cell were synthesized by the citrate method. The results show that the powders calcined at 800°C for 3h were high pure perovskite state and the position of XRD spectra diffraction peak of the cathode materials shifts to the small angle and the grain size of the powders is getting larger with increasing the content of Fe-doped. The open circuit voltage of the single cell made by molding method in the hydrogen/air with La_0.7Sr_0.15Ca_0.15Co_1-xFe_xO_3-δas its cathode got the maximum-value bwteen the the operation temperature from 550°C to 600°C.The maximum power density decreases from 392.85mW/cm2 to 331.99 mW/cm2 with x content increases from 0.1 to 0.4 at the the operation temperature of 650 °C.