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Preparation of alkaline solid polymer electrolyte based on PVA–TiO2–KOH–H2O and its performance in Zn–Ni battery

Authors :
Jifu Zhang
Qiumei Wu
Shangbin Sang
Source :
Journal of Physics and Chemistry of Solids. 69:2691-2695
Publication Year :
2008
Publisher :
Elsevier BV, 2008.

Abstract

A novel composite alkaline polymer electrolyte based on poly(vinyl alcohol) (PVA) polymer matrix, titanium dioxide (TiO2) ceramic fillers, KOH, and H2O was prepared by a solution casting method. The properties of PVA–TiO2–KOH alkaline polymer electrolyte films were studied by X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), and AC impedance techniques. DSC and XRD results showed that the domain of amorphous region in the PVA polymer matrix augmented when TiO2 filler was added. The SEM result showed that TiO2 particles dispersed into the PVA matrix although some TiO2 aggregates of several micrometers were formed. The alkaline polymer electrolyte showed excellent electrochemical properties. The room temperature (20 °C) ionic conductivity values of typical samples were between 0.102 and 0.171 S cm−1. The Zn–Ni secondary battery with the alkaline polymer electrolyte PVA–TiO2–KOH had excellent electrochemical property at the low charge–discharge rate.

Details

ISSN :
00223697
Volume :
69
Database :
OpenAIRE
Journal :
Journal of Physics and Chemistry of Solids
Accession number :
edsair.doi...........e6de979dbb4a6a901f35324776f23d99
Full Text :
https://doi.org/10.1016/j.jpcs.2008.06.132