Readily processed protonic ceramic fuel cells with high performance at low temperatures

被引：1149

作者：

Duan, Chuancheng ^{[1
]}

Tong, Jianhua ^{[1
]}

Shang, Meng ^{[1
]}

Nikodemski, Stefan ^{[1
]}

Sanders, Michael ^{[1
]}

Ricote, Sandrine ^{[1
]}

Almansoori, Ali ^{[2
]}

O'Hayre, Ryan ^{[1
]}

机构：

[1] Colorado Sch Mines, Golden, CO 80401 USA

[2] Petr Inst, Abu Dhabi, U Arab Emirates

来源：

SCIENCE | 2015年 / 349卷 / 6254期

基金：

美国国家科学基金会;

关键词：

DOPED BARIUM ZIRCONATE; CONDUCTIVITY; STABILITY; CATHODE;

D O I：

10.1126/science.aab3987

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Because of the generally lower activation energy associated with proton conduction in oxides compared to oxygen ion conduction, protonic ceramic fuel cells (PCFCs) should be able to operate at lower temperatures than solid oxide fuel cells (250 degrees to 550 degrees C versus >= 600 degrees C) on hydrogen and hydrocarbon fuels if fabrication challenges and suitable cathodes can be developed. We fabricated the complete sandwich structure of PCFCs directly from raw precursor oxides with only one moderate-temperature processing step through the use of sintering agents such as copper oxide. We also developed a proton-, oxygen-ion-, and electron-hole-conducting PCFC-compatible cathode material, BaCo0.4Fe0.4Zr0.1Y0.1O3-delta (BCFZY0.1), that greatly improved oxygen reduction reaction kinetics at intermediate to low temperatures. We demonstrated high performance from five different types of PCFC button cells without degradation after 1400 hours. Power densities as high as 455 milliwatts per square centimeter at 500 degrees C on H-2 and 142 milliwatts per square centimeter on CH4 were achieved, and operation was possible even at 350 degrees C.

引用

页码：1321 / 1326

页数：6

共 27 条

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