Study of microporous PVA/PVC composite polymer membrane and it application to MnO2 capacitors

A microporous poly(vinyl alcohol)/poly(vinyl chloride) (PVA/PVC) composite polymer membrane was successfully synthesized by a solution casting method and a preferential dissolution method. The characteristic properties of PVA/PVC composite polymer membranes were systematically studied by X-ray diffr...

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Bibliographic Details
Published in:Materials chemistry and physics 2009-04, Vol.114 (2-3), p.948-955
Main Authors: Yang, Chun-Chen, Wu, G.M.
Format: Article
Language:English
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Summary:A microporous poly(vinyl alcohol)/poly(vinyl chloride) (PVA/PVC) composite polymer membrane was successfully synthesized by a solution casting method and a preferential dissolution method. The characteristic properties of PVA/PVC composite polymer membranes were systematically studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), micro-Raman spectroscopy and AC impedance spectroscopy. The PVA/PVC composite polymer membrane shows excellent thermal property, dimensional stability, and the ionic conductivity; it is due to the addition of secondary PVC polymer fillers. The MnO2 capacitors with the PVA/PVC composite polymer membrane with 1 M Na2SO4 was assembled and examined. It was found that the MnO2 capacitor based on a microporous PVA/5 wt.%PVC composite polymer electrolyte membrane exhibited the maximum specific capacitance of 238 F g-1 and the current efficiency of 99% at 25 mV s-1 after 1000 cycle test. The result demonstrates that the novel microporous PVA/PVC composite polymer membrane is a potential candidate for use on the capacitors.
ISSN:0254-0584
DOI:10.1016/j.matchemphys.2008.11.009