A durable, high-performance hollow-nanofiber cathode for intermediate-temperature fuel cells

被引：102

作者：

Chen, Yu ^{[1
]}

Bu, Yunfei ^{[1
]}

Zhao, Bote ^{[1
]}

Zhang, Yanxiang ^{[2
]}

Ding, Dong ^{[1
]}

Hu, Renzong ^{[1
,3
]}

Wei, Tao ^{[1
]}

Rainwater, Ben ^{[1
]}

Ding, Yong ^{[1
]}

Chen, Fanglin ^{[4
]}

Yang, Chenghao ^{[3
]}

Liu, Jiang ^{[3
]}

Liu, Meilin ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Harbin Inst Technol, Natl Key Lab Precis Hot Proc Met, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

[3] South China Univ Technol, Sch Environm & Energy, New Energy Res Inst, Guangzhou Higher Educ Mega Ctr, Guangzhou 510006, Guangdong, Peoples R China

[4] Univ South Carolina, Dept Mech Engn, 300 Main St, Columbia, SC 29208 USA

来源：

NANO ENERGY | 2016年 / 26卷

基金：

美国国家科学基金会;

关键词：

SOFC; Cathode; ORR; Electrospinning; Fuel cell; Fiber; ANODE; TRANSPARENT; PERCOLATION;

D O I：

10.1016/j.nanoen.2016.05.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hollow nanofibers of PrBa0.5Sr0.5CO2O5+delta (PBSC), created by an electrospinning process, are assembled into a three dimensional (3D) fibrous porous electrode, providing facile pathways for gas transport and excellent electrical conductivity for efficient charge transfer and, thus, greatly enhancing the rate of oxygen reduction reactions (ORR), as confirmed by the small electrode polarization resistance and low activation energy. A simple geometric modeling suggests that an electrode with longer fibers tends to be more efficient in facilitating mass and charge transfer under the conditions studied. A solid oxide fuel cell based on this 3D fibrous cathode demonstrates a peak power density of 1.11 W cm(-2) at 550 degrees C when humidified H-2 was used as fuel and ambient air as oxidant. The fibrous architecture also shows excellent stability under the operating conditions. Further and in particular, the high-performance hollow-fiber electrodes are also applicable to other energy storage and conversion systems. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：90 / 99

页数：10

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