2006年2月
Aliphatic/aromatic polyimide lonomers as a proton conductive membrane for fuel cell applications
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- ,
- ,
- ,
- ,
- ,
- 巻
- 128
- 号
- 5
- 開始ページ
- 1762
- 終了ページ
- 1769
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1021/ja0571491
- 出版者・発行元
- AMER CHEMICAL SOC
To produce a proton conductive and durable polymer electrolyte membrane for fuel cell applications, a series of sulfonated polyimide ionomers containing aliphatic groups both in the main and in the side chains have been synthesized. The title polyimide ionomers 1 with the ion exchange capacity of 1.78-2.33 mequiv/g were obtained by a typical polycondensation reaction as transparent, ductile, and flexible membranes. The proton conductivity of 1 was slightly lower than that of the perfluorinated ionomer (Nafion) below 100 degrees C, but comparable at higher temperature and 100% RH. The highest conductivity of 0.18 S cm(-1) was obtained for 1 at 140 degrees C. lonomer 1 with high IEC and branched chemical structure exhibited improved proton conducting behavior without sacrificing membrane stability. Microscopic analyses revealed that smaller (< 5 nm) and well-dispersed hydrophilic domains contribute to better proton conducting properties. Hydrogen and oxygen permeability of 1 was 1-2 orders of magnitude lower than that of Nafion under both dry and wet conditions. Fuel cell was fabricated with 1 membrane and operated at 80 degrees C and 0.2 A/cm(2) supplying H-2 and air both at 60% or 90% RH. lonomer 1 membrane showed comparable performance to Nafion and was durable for 5000 h without distinct degradation.
- リンク情報
-
- DOI
- https://doi.org/10.1021/ja0571491
- CiNii Articles
- http://ci.nii.ac.jp/naid/80019335597
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/16448153
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000235224700074&DestApp=WOS_CPL
- ID情報
-
- DOI : 10.1021/ja0571491
- ISSN : 0002-7863
- CiNii Articles ID : 80019335597
- PubMed ID : 16448153
- Web of Science ID : WOS:000235224700074