title   
  

Cross-linker effect in ETFE-Based radiation-grafted proton-conducting membranes I. Properties and fuel cell performance characteristics

Gubler, Lorenz and Ben youcef, Hicham and Alkan Gürsel, Selmiye and Wokaun, Alexander and Scherer, Günther G. (2008) Cross-linker effect in ETFE-Based radiation-grafted proton-conducting membranes I. Properties and fuel cell performance characteristics. Journal of Electrochemical Society, 155 (9). B921-B928.

[img]
Preview
PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
243Kb

Official URL: http://dx.doi.org/10.1149/1.2951919

Abstract

Cross-linking of styrene grafted and sulfonated fuel cell membranes is essential to obtain well-performing and durable membranes. In this study, the properties and fuel cell performance of radiation grafted membranes based on poly(ethylene-althexafluoropropylene)(ETFE) 25 micron with different extent of cross-linking, using divinylbenzene (DVB )monomer to styrene, were investigated. The water uptake and proton conductivity decrease as a function of increasing the extent of crosslinking. Also, the membranes become more brittle. Fuel cell performance is limited by the high ohmic resistance of the membrane at high degrees of cross-linking, whereas at low degrees of cross-linking the membrane–electrode interface is of poor quality. Optimum performance is obtained at an extent of cross-linking corresponding to a styrene:DVB monomer ratio v/v of 95:5 in the grafting solution.

Item Type:Article
Subjects:T Technology > TP Chemical technology > TP0155-156 Chemical engineering
T Technology > TP Chemical technology > TP0200-248 Chemicals: Manufacture, use, etc.
T Technology > TP Chemical technology > TP1080 Polymers and polymer manufacture
ID Code:9860
Deposited By:Selmiye Alkan Gürsel
Deposited On:06 Nov 2008 20:49
Last Modified:06 Nov 2008 20:49

Repository Staff Only: item control page