Research Projects

Owing to limited storage of lithium in the earth, the researchers are alternatively thinking about sodium ion batteries (NIBs) because of their availability in large scales and low cost preparation techniques [1-3]. Na2O doped glassy system acts as the electrolyte of NIBs due to their important features in electrochemical stability, sensors, electrochemical devices etc. [4]. Out of two types of Na2O doped electrolytes, liquid electrolyte shows better electrical conductivity [2]. But liquid electrolytes exhibit lower capacitance and their stability is not up to the mark [2]. This shortcoming can be improved by using Na2O doped electrolyte in solid form because of their higher stability and easy accessibility [2]. Efforts [2] have been made to develop Na2O doped solid electrolytes, which show moderate ionic conductivity. This information led us to develop a new Na2O as well as NaI doped solid electrolyte with higher ionic conductivity at ambient temperature. Present work has been done with the following objectives: (i) To develop Na2O and NaI doped solid electrolytes in a very easy and low cost process (ii) To enhance electrical conductivity of the present system at ambient temperature (iii) To establish the relation between ion migration process and the dielectric properties in the present system (iv) To explore nature of conduction mechanism in the present system in a comparative manner with others work (v) To explore the nature of hopping or migration frequency of Na+ ions as well as electrochemical stability of the present system so that the newly developed Na2O or NaIdoped solid electrolytes can be regarded as suitable candidate for NIBs application.