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This project investigates the electrical and thermal characteristics of mixed conductor composites made of PEO:LiN(SO2CF2CF3)2 and activated carbon. The crystalline- amorphous transition in the mixed conductors was characterized by a differential scanning calorimeter (DCS). The ionic conductivity and the transport numbers were measured using the AC impedance and the potentiostatic techniques. The possibility of harvesting electrical energy from the ionic conductors when subjecting them to a mechanical excitation (vibrations) was investigated. Results showed that at room temperature the ionic conductivity of PEO:LiN(SO2CF2CF3)2 is 7.839X10-5 S/cm and it increased by almost five times when doped with 9wt% carbon. The ionic conductivity enhancement was attributed to two factors; to the space charge effect, and to the existence of the amorphous phase of the polymer as a result of dispersion of carbon particles. Results also showed that the electronic transport number increases with increasing the wt% carbon until it reaches its maximum value at 4wt% carbon. Finally, it was proven that it is possible to harvest electrical energy (in Micro-Joule) from the (PEO:LiBETI:C) mixed conductor when excited both electrically (with a small biased voltage) and mechanically(by mechanical vibration).

Publication Date


Project Designation

Graduate Research

Primary Advisor

Binod Kumar

Primary Advisor's Department

Electrochemical Power Group (Research Institute)


Stander Symposium poster

Electrical Properties of PEO-based Mixed Conductors