Document Type
Conference Item
Publication Date
1-1-2006
Abstract
In the present study, six systems of films have been prepared by the solution casting technique; they are the pure PMMA system, the (PMMA-EC) system, the (PMMA-LiBF4) system, the (PMMA-LiCFJSOJ) system, the (PMMA-EC-LiBF4) system and the (PMMA-EC-LiCFJSOJ) system. The conductivities of the films from each system are characterized by impedance spectroscopy. The room temperature electrical conductivity for the highest conducting film in the (PMMA-EC-LiBF4) and (PMMA-EC-LiCFJSOJ) systems are 4.07 x 10-7 Scm-I and 3.40 x 10-5 Scm-I respectively. It can be deduced that plasticizer, EC has dissociated more LiCFJSOJ salt compared to LiBF4 salt, thereby increasing the number of charged carriers in the (PMMA-EC-LiCFJSOJ) sample. The conductivity-temperature studies are carried out in the range of temperature from 303 K to 373 K. The results show that the conductivity is increased when the temperature is increased. Scanning Electron Microscopy analysis show the surface of (PMMA-EC-LiCFJSOJ) sample is smooth and homogeneous, hence lithium ions can traverse through the (PMMA-EC-LiCFJSOJ) sample easier compared to (PMMA-ECLiBF4) sample. X-Ray Diffraction studies show that the conductivity is increased when the crystallinity of the samples is reduced.
Keywords
Polymer electrolytes, Conductivity, Plasticizer, Lithium salts, SEM
Divisions
PHYSICS
Event Title
7th National Conference on Solid State lonics
Event Location
Coimbatore, India
Event Dates
6-8 June 2006
Event Type
conference
Additional Information
Conference paper