Composite proton-conducting membranes for PEMFCs

被引：17
|
作者：
Mustarelli, P. [1 ,2 ]
Carollo, A. [1 ,2 ]
Grandi, S. [1 ,2 ]
Quartarone, E. [1 ,2 ]
Tomasi, C. [1 ,2 ]
Leonardi, S. [1 ,2 ]
Magistris, A. [1 ,2 ]
机构：
[1] Univ Pavia, Dept Chem Phys, I-27100 Pavia, Italy
[2] IENI CNR, I-27100 Pavia, Italy
来源：
FUEL CELLS | 2007年 / 7卷 / 06期
关键词：
composite membranes; conductivity; hybrids; PEMFC; silica;
D O I：
10.1002/fuce.200700010
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Composite membranes are of interest for PEMFCs and DMFCs. This paper describes a basic study of the influence of silica on the proton conductivity: (i) added as a filler to poly(vinylidene fluoride-hexafluoropropylene) and poly(benzimidazole)-based membranes activated with H3PO4, or (ii) included in the matrix of class 11 hybrids based on tetraethoxysilane and poly(ethylene glycol) and activated with phosphotungstic acid (PWA). The addition of acidic silica as a filler determines proton conductivity increases up to one order of magnitude for filler amounts which strongly depend on the proton transport mechanism, and on the nature (free or partially free) of the activating acid. The increase of the silica content in the hybrid matrix induces a more complex behaviour which also depends on the amount of PWA.
引用
收藏
页码：441 / 446
页数：6
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