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Title: Hot-pressed nano-composite polymer electrolytes: (1-x) [70PEO:30KBrO3]:xSiO2
Authors: Chandra, Angesh
Chandra, Archana
Thakur, S S
Keywords: Hot-pressed polymer electrolytes;Ionic conductivity;Scanning electron microscope;Differential scanning calorimetry
Issue Date: Oct-2011
Publisher: NISCAIR-CSIR, India
Abstract: The electrical and electrochemical properties of PEO-based hot-pressed nano-composite polymer electrolyte (NCPE) membranes: (1-x) [70PEO:30KBrO3]:xSiO2, where x = 0-20 wt. (%), have been studied. NCPE membranes have been casted using a novel hot-press technique in place of the traditional solution cast method. The conventional Solid Polymer Electrolyte (SPE) composition: (70PEO: 30KBrO3), identified as the highest conducting film at room temperature, has been used as Ist-phase host matrix and nano-size (~8 nm) particles of SiO2 as IInd-phase dispersoid. As a consequence of dispersal of SiO2 in SPE host, a conductivity enhancement of an order of magnitude was achieved in NCPE film: [95(70PEO:30KBrO3):5SiO2]. This composition has been referred to as Optimum Conducting Composition (OCC). Materials characterization has been done with the help of SEM and DSC techniques. The ion transport behaviour in NCPE membranes have been discussed on the basis of conductivity (σ), mobility (µ), mobile ion concentration (n) and ionic transference number (tion) studies. The temperature dependent conductivity studies have also been done to compute the activation energy (Ea) values by least square linear fitting of ‘logσ-1/T’ Arrhenius plots. Thin film solid-state polymeric batteries were fabricated using NCPE OCC as electrolyte and the cell-potential discharge characteristics were studied under different load conditions.
Page(s): 698-702
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.49(10) [October 2011]

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