Fabrication and characterization of La_0.65Sr_0.3MnO_3−δ/(Y₂O₃)_0.08(ZrO₂)_0.92/Gd_0.1Ce_0.9O_2−δ tri-composite cathode-supported tubular direct carbon solid oxide fuel cell

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• 作者：Saeed ur Rehman^a ; ^b ; Rak-Hyun Song^a ; ^b ; Jong-Won Lee^a ; ^b ; Tak-Hyoung Lim^a ; ^b ; Seok-Joo Park^a ; ^b ; Seung-Bok Lee^a ; ^b ; ^{sblee@kier.re.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Supporting cathode ; Direct carbon fuel cell ; Tri-composite ; Porosity
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：1086-1091
• 全文大小：1389 K

文摘

The purpose of this study was to fabricate a porous supporting cathode for direct carbon solid oxide fuel cells (DCFC). Therefore, the effect of Gd_0.1Ce_0.9O_2−δ (GDC) addition on the phase stability, sintering behavior, thermal expansion, and porosity of La_0.65Sr_0.3MnO_3−δ/(Y₂O₃)_0.08(ZrO₂)_0.92 (LSM/YSZ) composite was evaluated. The sintering temperature and the porosity of the LSM/YSZ composite were observed to increase with increase in the amount of GDC. An LSM/YSZ/GDC tri-composite with optimized properties was selected to fabricate the tubular cathode-supported DCFCs (LSM/YSZ/GDC|YSZ|NiO/YSZ) through extrusion, slurry coating, and co-firing. A special chamber was designed for the DCFC operation of the tubular cell. Electrochemical characterization was performed by measuring the polarization curves and electrochemical impedance spectroscopy, using the syngas produced by in situ steam gasification of carbon black.