Highly efficient and robust cathode materials for low-temperature solid oxide fuel cells: PrBa0.5Sr0.5Co2-xFexO5+δ

被引：308

作者：

Choi, Sihyuk ^{[1
]}

Yoo, Seonyoung ^{[1
]}

Kim, Jiyoun ^{[1
,2
]}

Park, Seonhye ^{[1
]}

Jun, Areum ^{[1
]}

Sengodan, Sivaprakash ^{[1
]}

Kim, Junyoung ^{[1
]}

Shin, Jeeyoung ^{[3
]}

Jeong, Hu Young ^{[4
,5
]}

Choi, YongMan ^{[6
]}

Kim, Guntae ^{[1
]}

Liu, Meilin ^{[1
,7
]}

机构：

[1] UNIST, Interdisciplinary Sch Green Energy, Ulsan 689798, South Korea

[2] Agcy Def Dev, Convergence Technol Res Directorate, Taejon 300600, South Korea

[3] Dong Eui Univ, Dept Mech Engn, Pusan 614714, South Korea

[4] UNIST, UNIST Cent Res Facil, Ulsan 689798, South Korea

[5] UNIST, Sch Mech & Adv Mat Engn, Ulsan 689798, South Korea

[6] SABIC Technol Ctr, Riyadh 11551, Saudi Arabia

[7] Georgia Inst Technol, Ctr Innovat Fuel Cell & Battery Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

基金：

新加坡国家研究基金会;

关键词：

PEROVSKITES; DIFFUSION; ANODE;

D O I：

10.1038/srep02426

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：

Solid oxide fuel cells (SOFC) are the cleanest, most efficient, and cost-effective option for direct conversion to electricity of a wide variety of fuels. While significant progress has been made in anode materials with enhanced tolerance to coking and contaminant poisoning, cathodic polarization still contributes considerably to energy loss, more so at lower operating temperatures. Here we report a synergistic effect of co-doping in a cation-ordered double-perovskite material, PrBa0.5Sr0.5Co2-xFexO5+delta, which has created pore channels that dramatically enhance oxygen ion diffusion and surface oxygen exchange while maintaining excellent compatibility and stability under operating conditions. Test cells based on these cathode materials demonstrate peak power densities similar to 2.2 W cm(-2) at 600 degrees C, representing an important step toward commercially viable SOFC technologies.

引用

页数：6

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