Electrochemical Stability of High Conducting PAN-Based Electrolytes for Lithium Ion Polymer Cells

Abstract:

Polyacrylonitrile (PAN) based polymer electrolytes composed of PAN, lithium tetrafluoroborate (LiBF₄), ethylene carbonate (EC) and dimethyl phthalate (DMP) were prepared by solution casting technique. The variation of conductivity with LiBF₄ concentrations of the prepared films has been studied using AC impedance spectroscopy. The conductivity of the films is charge concentration dependent and the highest room temperature conductivity of 1.08 ×10^-2 S cm^-1 is achieved for the film with optimum composition. The thermal activated conductivity of the films obeys Arrhenius rule in the temperature range from 303 K to 353 K. The electrochemical stability of the PAN-based films has been investigated using linear sweep voltammetry (LSV) with three electrodes system. The films were found to be electrochemically stable up to 4.4 V. The reversibility of the lithium ions conduction in the polymer electrolyte films have been studied using cyclic voltammetry (CV).

• Periodical: Advanced Materials Research (Volume 1024)
• Pages: 335-338
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1024.335
• Online since: August 2014
• Authors: Woon Gie Chong, Khairul Bahiyah Md Isa, Lisani Othman, Nurul Husna Zainol, Siti Mariam Samin, Zurina Osman*
• Keywords: Conductivity, Cyclic Voltammetry (CV), Linear Sweep Voltammetry, Polyacrylonitrile, Polymer Electrolyte

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