Abstract:
Solid-state batteries due to their anti-leakage and durable performance are more
efficient and have high energy density as compared to aqueous batteries. Recently, solid state zinc ion batteries (ssZIB) have captured the global market for their inexpensive and eco-friendly nature. Herein, we report a green cellulose-based hydrogel electrolyte extracted from sawdust (SEC-PAM). The synthesized hydrogel, incorporating zinc salts, is assessed for its potential application in ssZIBs. Comprehensive characterization techniques, including Fourier-transform infrared spectroscopy (FTIR), gas
chromatography-mass spectrometry (GCMS), X-ray diffraction (XRD), scanning electron
microscopy (SEM), thermogravimetric analysis (TGA), tensile testing, are employed to
elucidate the morphological, thermal, and mechanical properties of the hydrogel. These
techniques have shown the interconnected porous matrix of cellulose linked with
acrylamide providing a streamlined pathway for zinc ion transportation. Furthermore, the
electrochemical performance of the hydrogel electrolyte is analyzed through
electrochemical impedance spectroscopy (EIS) to demonstrate its ionic conductivity and
suitability as a solid-state electrolyte which is calculated to be 2.1x10-2 Scm-1
. The SEC PAM hydrogel electrolyte shows porous structure, enhanced mechanical integrity, efficient thermal stability, and impressive electrochemical performance leading to a roadmap for further extension and utilization of ssZIBs in practical energy storage devices.
