Novel proton-conducting polyelectrolyte composed of an aromatic polyether containing main-chain pyridine units for fuel cell applications

被引:95
作者
Gourdoupi, N
Andreopoulou, AK
Deimede, V
Kallitsis, JK
机构
[1] Univ Patras, Dept Chem, GR-26500 Patras, Greece
[2] Fdn Res & Technol Hellas, Inst Chem Engn & High Temp Chem Proc, GR-26500 Patras, Greece
关键词
D O I
10.1021/cm0347382
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
A new high-molecular-weight, soluble, wholly aromatic polyether bearing polar pyridine and phosphinoxide groups along the main chain is presented. This easily processable polyether presents excellent film-forming properties, high glass-transition temperature (up to 260 degreesC), and thermal stability up to 500 degreesC, all together combined with an ability to form ionically conductive materials after doping with phosphoric acid. The polar groups throughout the polymeric chains enable high acid uptake and subsequent high ionic conductivity for the doped membranes in the range of 10(-2) S/cm. Characterization of all polymeric materials prepared was performed using NMR, size exclusion chromatography, thermal and mechanical analysis, and conductivity measurements. The oxidative stability of the materials was studied using hydrogen peroxide, and the treated membranes were further characterized using dynamic mechanical analysis and FT-Raman spectroscopy. The conductivity of the doped membranes was determined as a function of the doping level. The temperature dependence of the conductivity was also studied.
引用
收藏
页码:5044 / 5050
页数:7
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