Enhanced performance of La_0.7Sr_0.3Fe_0.9Ni_0.1O₃ cathode by partial substitution with Ce

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• 作者：Liu Zhen Bian^a ; ^{liuzhenbian@126.com" class="auth_mail" title="E-mail the corresponding author} ; Li Jun Wang^b ; ^{lijunwang@ustb.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Ning Chen^c ; ^{nchen@sina.com" class="auth_mail" title="E-mail the corresponding author} ; Fu Shen Li^c ; ^{lifsh_ustb@163.com" class="auth_mail" title="E-mail the corresponding author} ; Kuo-Chih Chou^a ; ^{kcc126@126.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Solid oxide fuel cell ; Perovskite ; Cathode materials ; Oxygen reduction reaction
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：982-987
• 全文大小：1060 K

文摘

The crystal structure, conductivity, and electrochemical properties of Ce doped La_0.7Sr_0.3Fe_0.9Ni_0.1O_3−δ (CLSFNi) have been investigated as solid oxide fuel cell (SOFC) cathode. The polarization resistance of symmetric cell was reduced, although the substitution of Ce at La-sites decreased the symmetry of crystal structure and total electrical conductivity. The results indicate that the incorporation of Ce improves the catalyst activity of oxygen reduction reaction. The addition of GDC (Gd_0.1Ce_0.9O_2-δ) can further decrease the polarization resistance (R_p); for example, the R_p values of CLSFNi and CLSFNi7-GDC3 at 750 °C are 0.130 and 0.047 Ω cm², respectively. The peak power density is 903, 499, 235 mW cm⁻² for the La_0.7Sr_0.3Fe_0.9Ni_0.1O_3−δ (LSFNi) cathode and 1091, 725, 423 mW cm⁻² for the CLSFNi cathode at 750 °C, 700 °C and 650 °C, respectively.