Title: Eco-friendly bio polymer based solid-state electrolyte and its application to storage devices

Abstract

Objective and scope: To develop a bio polymer based solid state battery which is ecofriendly, a good alternative for the liquid electrolytes used in present day batteries facing safety issues. Methods and results: A novel Solid – State biopolymer electrolyte was prepared from the biomaterial Corn Silk Extract(CSE) by blending with polyvinyl alcohol and different concentration MgCl2by opting solution casting technique. The maximum ionic conductivity of 1.747 × 10-5 Scm-1 for the blend pure biopolymer and 1.282 × 10-3 Scm-1 for the biopolymer electrolyte was obtained from the AC Impedance Analysis. The obtained biopolymer electrolyte is characterized by Fourier transform Infrared spectroscopy (FT – IR ) to look into the complex formation of the biopolymer blend and the salt. The increase in the amorphous nature of the novel biopolymer electrolyte at a composition of 1g PVA + 0.9g CSE + 0.45wt% MgCl2 is explained by the XRD pattern. The impact of addition of different concentration of MgCl2 on the Glass transition temperature was provided by the differential scanning colorimetry (DSC) process. The electrochemical potential window of the biopolymer electrolyte with maximum conductivity is obtained as 2.65 V in linear sweep voltammetry(LSV). Transference number is calculated from Wagner’s and Evans polarization technique. A primary Mg – ion battery is constructed with an open circuit voltage of 1.95V at room temperature. Conclusion: With the development efficient solid electrolyte for battery using biowaste materials, this promise to have a wide potential for sustainable energy storage. Such solid electrolytes containing green , biodegradable components will be an alternative solution to the ecological problem of electronic waste.