Characterisation and optimisation of the cathode/electrolyte couple for SOFC LSCF/BIT07

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• 作者：Marika Letilly ; Olivier Joubert ; Annie Le Gal La Salle ; ^{annie.legal@cnrs-imn.fr}
• 关键词：BIT07 ; LSCF ; SOFC ; EIS ; Optimisation ; Ageing
• 刊名：Journal of Power Sources
• 出版年：2012
• 期刊代码：58_03787753
• 类别：ce
• 出版时间：15 August, 2012
• 卷：212
• 期：Complete
• 页码：161-168
• 文件大小：1048 K

摘要

BaIn_0.3Ti_0.7O_2.85 (BIT07) is a new electrolyte material for solid oxide fuel cells (SOFC). Its use with the cathode material La_0.58Sr_0.4Co_0.2Fe_0.8O_3鈭?em>未 (LSCF) is advantageous due to their reaction (above 1000 掳C) that leads to the formation of perovskite compounds called BLSITCFx (Ba_xLa_{0.58(1鈭?em>x)}Sr_{0.4(1鈭?em>x)}In_0.3xTi_0.7xCo_{0.2(1鈭?em>x)}Fe_{0.8(1鈭?em>x)}O_3鈭?em>未, with 0 鈮?#xA0;x 鈮?#xA0;1) at the cathode/electrolyte interface. In this study, the influence of the cathode microstructure on its performance has been investigated, by varying the cathode parameters. An area specific resistance (ASR) value of 0.07 惟 cm² at 700 掳C has been reached and more generally the cathodes exhibit good performance (below 0.2 惟 cm²) for a large range of thermal treatments, cathode grain sizes and thicknesses. An ageing study realised at 700 掳C for 320 h showed an ageing rate of 0.125% h^鈭?.