Cobalt coated electrodes for high efficiency PEM fuel cells by plasma sputtering deposition

被引：5
作者：
Tang, Zhe [1 ]
Poh, Chee Kok [2 ]
Chin, Kok Chung [3 ]
Chua, Daniel H. C. [1 ]
Lin, Jianyi [2 ]
Wee, Andrew T. S. [3 ]
机构：
[1] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117574, Singapore
[2] Inst Chem & Engn Sci, Singapore 627833, Singapore
[3] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2009年 / 39卷 / 10期
关键词：
Proton exchange membrane fuel cell; Membrane electrode assembly; Sputtering; Cobalt; PLATINUM LOADING ELECTRODES; OXYGEN REDUCTION; PERFORMANCE; TECHNOLOGY; CATALYSTS; NI; CO;
D O I：
10.1007/s10800-009-9885-3
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Proton exchange membrane (PEM) fuel cell electrodes coated with ultra-thin Co layer have been successfully fabricated via plasma sputter-deposition. In order to investigate the influence of Co layers on the oxygen reduction reaction, a series of Co layers with different nominal thickness have been deposited into the cathode-membrane interface. The polarization curves confirmed visible enhancement in cell performance when a 5 nm Co layer on cathode gave rise to a high current density of 750 mA cm(-2) at 0.6 V. Scanning electron microscopy showed that the sputter deposited 5 nm Co layer formed nanosized island structures on the porous electrode, while electrochemical impedance spectra confirmed that a reduction in the total impedance of the electrode led to the improvement of the membrane electrode assembly (MEA) performance.
引用
收藏
页码：1821 / 1826
页数：6
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