Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10603276 | Carbohydrate Polymers | 2013 | 8 Pages |
Abstract
A novel composite membrane has been developed by doping cesium phosphotungstate salt (CsxH3âxPW12O40 (0 â¤Â x â¤3), Csx-PTA) into chitosan (CTS/Csx-PTA) for application in direct methanol fuel cells (DMFCs). Uniform distribution of Csx-PTA nanoparticles has been achieved in the chitosan matrix. The proton conductivity of the composite membrane is significantly affected by the Csx-PTA content in the composite membrane as well as the Cs substitution in PTA. The highest proton conductivity for the CTS/Csx-PTA membranes was obtained with x = 2 and Cs2-PTA content of 5 wt%. The value is 6 Ã 10â3 S cmâ1 and 1.75 Ã 10â2 S cmâ1 at 298 K and 353 K, respectively. The methanol permeability of CTS/Cs2-PTA membrane is about 5.6 Ã 10â7, 90% lower than that of Nafion-212 membrane. The highest selectivity factor (Ï) was obtained on CTS/Cs2-PTA-5 wt% composite membrane, 1.1 Ã 104/S cmâ3 s. The present study indicates the promising potential of CTS/Csx-PTA composite membrane as alternative proton exchange membranes in direct methanol fuel cells.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Yanxin Xiao, Yan Xiang, Ruijie Xiu, Shanfu Lu,