Novel Ba_0.5Sr_0.5(Co_0.8Fe_0.2)_{1 鈭?#xa0;x}Ti_xO_{3 鈭?#xa0;未} (x = 0, 0.05, and 0.1) cathode materials for proton-conducting solid oxide fuel cells

详细信息	查看全文 | 推荐本文 |

• 作者：Lei Bi ; Emiliana Fabbri ; Enrico Traversa ; ^{TRAVERSA.Enrico@nims.go.jp}
• 关键词：Ba0.5Sr0.5Co0.8Fe0.2O3&#xA0 ; &minus ; &#xA0 ; 未 ; Ti-doping ; Chemical stability ; Proton conductor ; Solid oxide fuel cell ; Cathode
• 刊名：Solid State Ionics
• 出版年：2012
• 期刊代码：96_01672738
• 类别：ch
• 出版时间：25 April, 2012
• 卷：214
• 期：Complete
• 页码：1-5
• 文件大小：710 K

摘要

Ba_0.5Sr_0.5(Co_0.8Fe_0.2)_{1 鈭?#xA0;x}Ti_xO_{3 鈭?#xA0;未} (x = 0, 0.05, and 0.1) materials were successfully prepared via an improved solid-state reaction route in an attempt to get better chemical stability for Ba_0.5Sr_0.5Co_0.8Fe_0.2O_{3 鈭?#xA0;未} (BSCF). Stability tests showed that the novel Ti-doping strategy can effectively increase the chemical stability for Ba_0.5Sr_0.5Co_0.8Fe_0.2O_{3 鈭?#xA0;未} in CO₂-containing environments. The larger the Ti doping amount, the better the chemical stability. Ti-doped samples showed only a slight increase in area specific resistance (ASR) values, as shown from electrochemical tests performed on symmetrical cells. Therefore, anode-supported single fuel cells using BaZr_0.4Ce_0.4Y_0.2O_{3 鈭?#xA0;未} (BZCY) as the electrolyte and BZCY-Ba_0.5Sr_0.5(Co_0.8Fe_0.2)_0.9Ti_0.1O_{3 鈭?#xA0;未} as the composite cathode, were fabricated and tested. The measured maximum power density values were 181, 116, and 49 mW cm^鈭?#xA0;2 at 700, 600, and 500 掳C, respectively.