Biodegradable electrolyte developed from pectin incorporated with NaI for Na-ion batteries; a feasibility study
摘要
Eco-friendly products are required for energy storage devices to attain sustainability. In this regard, the present study pertains to the biodegradable electrolyte developed from pectin as a host polymer that incorporates various compositions of sodium iodide (NaI) as an ionic dopant and plasticised with 1,3-Dioxolane (1,3-DOL) for Na-ion battery applications. The electrolyte was prepared using the solution casting technique. The prepared biopolymer electrolytes were characterised by various techniques. The peak shifts observed in FT-IR spectra confirm the complexation between the host polymer and ionic dopant. Surface morphology and surface roughness parameter (Ra) have been analysed by 3D optical studies. Thermal stability of 580 °C was observed for the highest conductive electrolytes among the samples prepared. The highest ionic conductivity was found to be 3.1 × 10–3 S cm−1 for the electrolyte with composition 40:55:5 M. wt.% of Pectin: NaI: 1,3 DOL, hence it may be used as a suitable electrolyte for Na-ion battery. The transport number of cation is 0.79, which shows a higher contribution of Na+ ions to the conductance of the electrolyte when compared to the anion. This present study is used to check the feasibility of pectin: NaI: 1,3-DOL for sodium-ion battery application.