A new mucilage-based biopolymer (Hybanthus enneaspermus) electrolyte for electrochemical applications
摘要
Liquid-based electrolytes used in commercial batteries have drawbacks including flammability, leakage, toxicity, and the requirement of separator. Replacing it with a solid polymer electrolyte will be highly beneficial. Mucilage-based polysaccharides derived from plants provide a number of benefits, including being non-toxic, widely available, affordable, etc. A solid electrolyte based on Hybanthus enneaspermus leaves extract (HELE) were synthesized using the solution cast technique. The various salt concentrations (0.075g, 0.150g, 0.225g, and 0.300g) were combined with one gram of HELE powder to prepare four electrolyte membranes. The X-ray diffractometer (XRD) verified an increase in the material's amorphous nature with salt concentration. Different functional groups of the leaf extract interacted with the salt, as revealed by Fourier transform infrared spectroscopy (FTIR). Using electrochemical impedance spectroscopy (EIS), the electrical and dielectric properties of the produced electrolyte were investigated. The membrane's maximum conductivity was found to be in the order of 10-3 S/cm. The ion transference number of value 0.91 confirmed the dominance of mobile ions in the electrolyte. The measured electrochemical window was 2.89 volts. The fabricated primary battery's Open Circuit Voltage (OCV) was determined to be 1.7V, while the stabilized OCV was found to be 1.291V