Properties, degradation and high temperature fuel cell test of different types of PBI and PBI blend membranes

被引：187

作者：

Li, Q. F. ^{[1
]}

Rudbeck, H. C. ^{[2
]}

Chromik, A. ^{[3
]}

Jensen, J. O. ^{[1
]}

Pan, C. ^{[1
]}

Steenberg, T. ^{[2
]}

Calverley, M. ^{[1
]}

Bjerrum, N. J. ^{[1
]}

Kerres, J. ^{[3
]}

机构：

[1] Tech Univ Denmark, Dept Chem, Energy & Mat Sci Grp, DK-2800 Lyngby, Denmark

[2] Danish Power Syst ApS, DK-2920 Charlottenlund, Denmark

[3] Univ Stuttgart, Inst Chem Proc Engn, D-70199 Stuttgart, Germany

来源：

JOURNAL OF MEMBRANE SCIENCE | 2010年 / 347卷 / 1-2期

关键词：

Polybenzimidazole (PBI) synthesis; Partially fluorinated polyether; Phosphoric acid; Blend membrane; Oxidative stability; Fuel cell; ACID DOPED POLYBENZIMIDAZOLE; GEL-PERMEATION CHROMATOGRAPHY; PROTON CONDUCTING MEMBRANES; PHOSPHORIC-ACID; IONOMER MEMBRANES; SULFONATED POLYBENZIMIDAZOLE; ELECTROLYTE MEMBRANES; POLYMER; POLYETHERS; H3PO4;

D O I：

10.1016/j.memsci.2009.10.032

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Polybenzimidazoles (PBIs) with synthetically modified structures and their blends with a partially fluorinated sulfonated aromatic polyether have been prepared and characterized for high temperature proton exchange membrane fuel cells. Significant improvement in the polymer chemical stability in terms of the oxidative weight loss, molecular weight decrease and onset temperatures for the thermal SO2 and CO splitting-off was achieved with the electron-deficient polybenzimidazoles containing -S(O)(2)- and -C(CF3)(2)- bridging groups. lonical cross-linking in the form of acid-base blends was found to further improve the polymer stability and assist maintaining the membrane integrity. Upon acid doping the membrane swelling was reduced for the modified PBI and their blend membranes, which, in turn, results in enhancement of the mechanical strength, proton conductivity and high temperature fuel cell performance. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：260 / 270

页数：11

共 53 条

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