Study on ionic conduction of solid bio-polymer hybrid electrolytes based carboxymethyl cellulose (CMC)/polyvinyl alcohol (PVA) doped NH_4NO_3

摘要

Carboxymethyl cellulose (CMC)/polyvinyl alcohol (PVA) blend (80/20 wt %) as host solid bio-polymer electrolytes complexed with different weight percentage ratios of NH_4NO_3 were prepared via solution casting approach. Impedance spectroscopy was carried out to disclose the electrical response of the CMC/PVA hybrid electrolytes as a function of various weight percentage of NH_4NO_3 salt. It is found that the CMC/PVA blend complexed with 30 wt % of NH_4NO_3 was demonstrated relatively higher room temperature conductivity by the order of 10~(-4) S/cm. The dielectric behaviour has been analyzed via complex permittivity (ε~*) and complex modulus (M~*) which varies anomalously with percentage of NH_4NO_3 confirms the non-Debye behaviour. Besides that, the temperature dependent dc conductivity of polymer electrolyte seems to obey Arrhenius relation, and the activation energies decrease with an increase in NH_4NO_3. Thus, confirming their potential as promising candidates of all-solid-state proton conducting electrolyte in the electrochemical devices.