High power density cell using nanostructured Sr-doped SmCoO3 and Sm-doped CeO2 composite powder synthesized by spray pyrolysis

JOURNAL OF POWER SOURCES

卷:302

Article

Shimada, Hiroyuki¹  Yamaguchi, Toshiaki¹  Suzuki, Toshio¹  Sumi, Hirofumi¹  Hamamoto, Koichi¹  Fujishiro, Yoshinobu¹ 

[1] Natl Inst Adv Ind Sci & Technol, Dept Mat & Chem, Inorgan Funct Mat Res Inst, Moriyama Ku, Nagoya, Aichi 4638560, Japan

关键词: Solid oxide fuel cell (SOFC);    Spray pyrolysis;    Nano-composite powder;    High power density;    Cathode;    Anode-supported cell;   

DOI  :  10.1016/j.jpowsour.2015.10.082

来源: Elsevier

【 摘 要 】

High power density solid oxide electrochemical cells were developed using nanostructure-controlled composite powder consisting of Sr-doped SmCoO3 (SSC) and Sm-doped CeO2 (SDC) for electrode material. The SSC-SDC nano-composite powder, which was synthesized by spray pyrolysis, had a narrow particle size distribution (D-10, D-50, and D-90 of 0.59, 0.71, and 0.94 mu m, respectively), and individual particles were spherical, composing of nano-size SSC and SDC fragments (approximately 10-15 nm). The application of the powder to a cathode for an anode-supported solid oxide fuel cell (SOFC) realized extremely fine cathode microstructure and excellent cell performance. The anode-supported SOFC with the SSC-SDC cathode achieved maximum power density of 3.65, 2.44, 1.43, and 0.76W cm(-2) at 800, 750, 700, and 650 degrees C, respectively, using humidified H-2 as fuel and air as oxidant This result could be explained by the extended electrochemically active region in the cathode induced by controlling the structure of the starting powder at the nano-order level. (C) 2015 Elsevier B.V. All rights reserved.

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