Journal
MATERIALS RESEARCH INNOVATIONS
Volume 15, Issue -, Pages 168-172Publisher
MANEY PUBLISHING
DOI: 10.1179/143307511X13031890748858
Keywords
Polymer electrolytes; Cellulose acetate; Conductivity
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Funding
- Universiti Teknologi MARA
- Ministry of Higher Education of Malaysia [FRGS 600-RMI/ST/FRGS 5/3Fst (16/2010)]
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In this work, cellulose acetate was doped, with ammonium tetrafluoroborate as doping salt, to form polymer electrolytes. Further enhancement in conductivity was carried out by plasticising the salted polymer electrolytes with polyethylene glycols (polyethylene glycol 600). The ionic conductivity sigma of the films was determined using electrochemical impedance spectroscopy. The highest sigma obtained for the cellulose acetate-ammonium tetrafluoroborate film was 2.18 x 10(-7) S cm(-1) and enhanced to 1.41 x 10(-5) S cm(-1) with the addition of 30 wt-% polyethylene glycol 600. The data were then analysed using complex permittivity epsilon* and complex electrical modulus formalism M* for the highest conductivity unplasticised and plasticised samples at various temperatures. The temperature dependent conductivity data obey the Arrhenius relationship. The polymer-salt complexation has also been confirmed by attenuated total reflectance Fourier transform infrared spectral studies.
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