Abstract
A solid bio-electrolyte has been prepared by blending the extract of the silk part of the corn biomass (corn silk extract, CSE), polyvinyl alcohol (PVA) and NH4HCO2 as the charge carrier via the solution casting technique. This biodegradable electrolyte is optimized by the AC impedance analysis for the composition 1 g PVA + 0.9 g CSE + 0.5 wt% NH4HCO2 from their maximum conductivity values. The highest ionic conductivity for this optimized composition at room temperature is 3.302×10–3 S cm–1. This bio-electrolyte is then characterized by X-ray diffraction technique, Fourier transform infrared spectroscopy, differential scanning calorimetry, transference number analysis and electrochemical impedance spectroscopy. A primary proton-conducting battery was constructed with an output circuit voltage of 1.83 V at room temperature. A single stack PEM fuel cell has been constructed with the bio-electrolyte (0.9 g CSE + 1 g PVA + 0.5 wt% NH4HCO2) and obtained an output circuit of 480 mV. This work implies the possibility of the development of an electrolyte from a biodegradable and renewable source for energy storage applications.
Graphical abstract
Synopsis: A bio-membrane from Corn biomass has been developed by blending the extract of the corn silk with polyvinyl alcohol and then a bio-electrolyte has been cast by adding ammonium formate as an ionic dopant. A primary proton cell with an output voltage of 1.83 V is fabricated with the bio-electrolyte.
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Acknowledgement
K Suvarnna and Dr S Jone Kirubavathy would like to thank DST FIST, Government of India, for their equipment support.
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Suvarnna, K., Shanjitha, S., Selvasekarapandian, S. et al. Investigation of solid bio-membrane based on corn biomass as a proton-conducting bio-electrolyte. Bull Mater Sci 46, 112 (2023). https://doi.org/10.1007/s12034-023-02946-y
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DOI: https://doi.org/10.1007/s12034-023-02946-y