Polyelectrolyte complexes of chitosan and phosphotungstic acid as proton-conducting membranes for direct methanol fuel cells

被引：98

作者：

Cui, Zhiming ^{[1
]}

Liu, Changpeng ^{[1
]}

Lu, Tianhong ^{[1
]}

Xing, Wei ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Changchun 130022, Jilin, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2007年 / 167卷 / 01期

基金：

中国国家自然科学基金;

关键词：

polyelectrolyte complexes; proton conducting; chitosan; phosphotungstic acid;

D O I：

10.1016/j.jpowsour.2006.12.112

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：

Polyelectrolyte complexes (PECs) of chitosan and phosphotungstic acid have been prepared and evaluated as novel proton-conducting membranes for direct methanol fuel cells. Phosphotungstic acid can be fixed within PECs membranes through strong electrostatic interactions, which avoids the decrease of conductivity caused by the dissolving of phosphotungstic acid as previously reported. Scanning electron microscopy (SEM) shows that the PECs membranes are homogeneous and dense. Fourier transform infrared spectroscopy (FTIR) demonstrates that hydrogen bonding is formed between chitosan and phosphotungstic acid. Thermogravimetric analysis (TGA) shows that the PECs membranes have good thermal stability up to 210 degrees C. The PECs membranes exhibit good swelling properties and low methanol permeability (P, 3.3 x 10(-7) cm(2) s(-1)). Proton conductivity (sigma) of the PECs membranes increases at elevated temperature, reaching the value of 0.024 S cm(-1) at 80 degrees C. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：94 / 99

页数：6

共 36 条

[1] Proton-conducting methacrylate-silica sol-gel membranes containing tungstophosphoric acid [J].

Aparicio, M ;

Mosa, J ;

Etienne, A ;

Durán, A .

JOURNAL OF POWER SOURCES, 2005, 145 (02) :231-236

[2] Synthesis and characterisation of proton conducting styrene-co-methacrylate-silica sol-gel membranes containing tungstophosphoric acid [J].

Aparicio, M ;

Castro, Y ;

Duran, A .

SOLID STATE IONICS, 2005, 176 (3-4) :333-340

[3] Present general status of understanding of heteropoly electrolytes and a tracing of some major highlights in the history of their elucidation [J].

Baker, LCW ;

Glick, DC .

CHEMICAL REVIEWS, 1998, 98 (01) :3-49

[4] The effect of structure on pervaporation of chitosan membrane [J].

Ge, JJ ;

Cui, YF ;

Yan, Y ;

Jiang, WY .

JOURNAL OF MEMBRANE SCIENCE, 2000, 165 (01) :75-81

[5] Methanol crossover in direct methanol fuel cells: a link between power and energy density [J].

Gurau, B ;

Smotkin, ES .

JOURNAL OF POWER SOURCES, 2002, 112 (02) :339-352

[6] A review of the state-of-the-art of the methanol crossover in direct methanol fuel cells [J].

Heinzel, A ;

Barragán, VM .

JOURNAL OF POWER SOURCES, 1999, 84 (01) :70-74

[7] Preparation of Pd-coated polymer electrolyte membranes and their application in direct methanol fuel cells [J].

Hejze, T ;

Gollas, BR ;

Sauerbrey, RK ;

Schmied, M ;

Hofer, F ;

Besenhard, JO .

JOURNAL OF POWER SOURCES, 2005, 140 (01) :21-27

[8] Protonic conducting organic/inorganic nanocomposites for polymer electrolyte membrane [J].

Honma, I ;

Nomura, S ;

Nakajima, H .

JOURNAL OF MEMBRANE SCIENCE, 2001, 185 (01) :83-94

[9] Modification of Nafion proton exchange membranes to reduce methanol crossover in PEM fuel cells [J].

Jia, NY ;

Lefebvre, MC ;

Halfyard, J ;

Qi, ZG ;

Pickup, PG .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2000, 3 (12) :529-531

[10] Preparation of composite membrane between a uniform porous silica matrix and injected proton conductive gel polymer [J].

Kanamura, K ;

Mitsui, T ;

Munakata, H .

CHEMISTRY OF MATERIALS, 2005, 17 (19) :4845-4851

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