Abstract
Frequency dependent conductivity of amorphous polymeric solid electrolyte containing LiN(SO2CF3)2 (LiTFSI) or LiBF4 was studied. Successive heating and cooling cycles showed changeable conductivity behavior, which was due to chemistry change in the lithium salts. Both salts showed a tendency of decreasing conductivity in the second cooling process. The decrease in conductivity behavior for samples containing LiBF4 was much higher if compared with those containing LiTFSI. Effect of heat on polymer network itself was not considered in this investigation.
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