| Literature DB >> 23987340 |
Yanxin Xiao1, Yan Xiang, Ruijie Xiu, Shanfu Lu.
Abstract
A novel composite membrane has been developed by doping cesium phosphotungstate salt (CsxH3-xPW12O40 (0≤x≤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 6×10(-3) S cm(-1) and 1.75×10(-2) S cm(-1) at 298 K and 353 K, respectively. The methanol permeability of CTS/Cs2-PTA membrane is about 5.6×10(-7), 90% lower than that of Nafion-212 membrane. The highest selectivity factor (φ) was obtained on CTS/Cs2-PTA-5 wt% composite membrane, 1.1×10(4)/Scm(-3)s. The present study indicates the promising potential of CTS/Csx-PTA composite membrane as alternative proton exchange membranes in direct methanol fuel cells.Entities:
Keywords: Alternative proton exchange membranes; CTS; CTS/Cs(x)PTA; Cesium phosphotungstate salt; Chitosan; Cs(x)PTA; Direct methanol fuel cells; FID; GC; HPAs; Methanol crossover; NPs; P; PTA; S(dry); S(wet); W(dry); W(wet); WU; area of the dry membrane; area of wet membrane; cesium phosphotungstate salt (0≤x≤3); cesium phosphotungstate salt and chitosan composite membrane; chitosan; gas chromatography; heteropolyacids; hydrogen flame ionization; methanol diffusion coefficient; nanoparticles; phosphotungstate salt; proton conductivity; selectivity factor; swelling degree; water uptake; weight of dry membrane; weight of wet membrane; ΔS; σ; φ
Mesh：
Substances：
Year: 2013 PMID： 23987340 DOI： 10.1016/j.carbpol.2013.06.017
Source DB: PubMed Journal: Carbohydr Polym ISSN： 0144-8617 Impact factor: 9.381