Dual-bonded catalyst layer structure cathode for PEMFC

被引:31
作者
Zhang, Xuewei [1 ]
Shi, Pengfei [1 ]
机构
[1] Harbin Inst Technol, Dept Appl Chem, Harbin 150001, Peoples R China
关键词
PEMFC; cathode; catalyst layer; PTFE-bonded; ionomer-bonded; dual-bonded;
D O I
10.1016/j.elecom.2006.05.026
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Novel electrode structure based on dual-bonded catalyst layer structure is reported to elevate proton exchange membrane fuel cell (PEMFC) cathode performance. Differing from conventional cathode with simplex PTFE or ionomer as binder material in catalyst layer (CL), dual-bonded CL combines those two types of binders, respectively, in a composite structure. In order to develop a cathode possessing the superior merits of both mass transport and proton transfer, a PTFE-rich CL and an ionomer-rich CL were fabricated on gas diffusion layer in proper order. Polarization characteristic of cathodes with dual-bonded CL, conventional PTFE-bonded CL and ionomer-bonded CL were evaluated at ambient pressure in oxygen/air. Better performance of cathode was achieved with dual-bonded, compared with conventional structures. Electric yield rate of dual-bonded cathode was about 50%, whilst that of conventional cathodes was about 40%. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:1229 / 1234
页数:6
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