DocumentCode :
2102996
Title :
PVA/STA composite polymer electrolyte membranes for fuel cell application: Synthesis and characterization
Author :
Anis, Arfat ; Banthia, A.K. ; Bandyopadhyay, Sri
Author_Institution :
Mater. Sci. Center, IIT Kharagpur, Kharagpur
fYear :
2008
fDate :
22-24 Dec. 2008
Firstpage :
36
Lastpage :
46
Abstract :
The proton conductivity of chemically cross-linked composite membranes consisting of poly(vinyl alcohol) (PVA) and silicotungstic acid (STA) prepared by solution casting as proton-conducting polymer electrolytes was investigated as a function of blending composition, cross-linking density, and temperature. The conductivity mechanism was investigated by using Impedance spectroscopy in the region between 40 Hz and 10 MHz. Membranes were also characterized by FTIR to confirm the cross-linking reaction and differential scanning calorimetry (DSC) to assess the thermal stability. Membrane swelling decreased with increase in cross-linking density accompanied by improvement in mechanical properties. The proton conductivity of the membranes was of the order of 10-3 S/cm and showed similar resistance to methanol permeability as Nafion 117 under the same measurement conditions.
Keywords :
Fourier transform spectra; casting; composite materials; differential scanning calorimetry; infrared spectra; ionic conductivity; membranes; permeability; polymer blends; polymer electrolytes; thermal stability; FTIR spectroscopy; Nafion 117; blending composition; chemical cross-linking; composite; cross-linking reaction; differential scanning calorimetry; frequency 40 Hz to 10 MHz; fuel cell; impedance spectroscopy; mechanical properties; membranes; methanol permeability; poly(vinyl alcohol); proton conductivity; proton-conducting polymer electrolytes; silicotungstic acid; solution casting; swelling; thermal stability; Biomembranes; Calorimetry; Casting; Chemicals; Conductivity; Electrochemical impedance spectroscopy; Fuel cells; Polymers; Protons; Temperature;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced Optoelectronic Materials and Devices, 2008. AOMD 2008. 2nd National Workshop on
Conference_Location :
Varanasi
Print_ISBN :
978-0-230-63718-4
Type :
conf
Filename :
5075687
Link To Document :
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