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https://www.ias.ac.in/article/fulltext/boms/034/07/1297-1304

Polymer nanocomposite gel electrolytes; ionic conductivity; polymer electrolytes; X-ray diffraction; differential scanning calorimetry.

In the present work, an attempt has been made to develop nano aluminium oxide (Al₂O₃)-filled polyvinyl alcohol (PVA) composite gel electrolytes. Surface morphological studies, thermal behaviour, electrochemical stability and electrical characterization of these composite gel electrolytes have been performed. An increase in the concentration of Al₂O₃ in composite gel electrolytes increases the amorphous characteristics of pure PVA. Bulk conductivity of composite gel electrolytes increases by an order of magnitude on addition of a nano filler. Maximum conductivity of 5.81 × 10^-2 S/cm is observed for 6 wt% Al₂O₃-filled polymer gel composite electrolytes. Temperature dependence of electrical conductivity shows a combination of Arrhenius and Vogel–Tamman–Fulcher (VTF) nature. Maximum current stability during oxidation and reduction cycle is noticed for 6 wt% Al₂O₃-filled PVA composite electrolyte, viz. ±1.65 V.

Navin Chand¹ Neelesh Rai² S L Agrawal² S K Patel²

1. Advanced Materials and Processes Research Institute (AMPRI), (Formerly RRL) (CSIR) Habibganj Naka, Bhopal, India
2. SSI Laboratory, Department of Physics, APS University, Rewa, Madhya Pradesh, India

Published

December 2011

Manuscript received

27 May 2010

Manuscript revised

10 February 2011