Ac Conductivity and Dielectric Properties of Hexanoyl Chitosan-LiClO₄-TiO₂ Composite Polymer Electrolytes

Abstract:

Hexanoyl chitosan: LiClO₄: TiO₂ composite electrolyte films were prepared by the solution cast technique. The ac conductivity and dielectric properties of the samples prepared have been studied in the frequency range from 100 Hz to 1 MHz over the temperature range from 273 to 333 K. The exponent s in the Jonscher’s universal power law, σ(ω)=σ_dc+Aω^s was analyzed as a function of temperature and the analysis suggests that the conduction mechanism can be interpreted based on the correlated barrier hopping (CBH) model. The barrier heights, W_M were calculated. The values of W_M are found to decrease with increasing temperature in the same manner as the exponent s. Both dielectric constant and dielectric loss decrease with increase in frequency and increase with increase in temperature.

• Periodical: Advanced Materials Research (Volumes 335-336)
• Pages: 873-880
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.335-336.873
• Online since: September 2011
• Authors: Tan Winie, Chin Han Chan, Ri Hanum Yahaya Subban
• Keywords: Correlated Barrier Hopping (CBH) Model, Dielectric Property, Hexanoyl Chitosan, Polymer Electrolyte, Power Law Exponent

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