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Experimental analysis of electromechanical stability and capacitive performances in flexible woven natural fiber composite
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DOI：10.1088/1361-665X/ae6762.png)
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Abstract
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The present study aims to investigate the electromechanical stability and capacitive performances of flexible, woven natural fiber composites. The pineapple fibers were functionalized with reduced graphene oxide (rGO)/Polyaniline (PANI) via electroless NiP deposition (ENiP) and in-situ polymerization. Three different composites were developed for validating performance. The functionalized fiber composite subjected to 500 bending cycles at a 180 degrees angle and electromechanical stability was analyzed through four point-probe by allowing 5 mA applied current at room temperature. The capacitive retention performances of the same composite were evaluated using a three-electrode galvanostatic charging-discharging setup at a current density of 0.1 mA cm-2. The test results revealed that hybrid rGO/PANI functionalized pineapple fiber composite (HFPAF) exhibited 15% lower surface electrical resistivity. Furthermore, it demonstrated 92.58% of initial conductivity retention after 500 cycles of bending to 180 degrees. The hybrid functionalization significantly enhanced both the capacitance and cyclic stability of functionalized pineapple fiber due to the hydrophilic nature, porous, and hierarchical cellular structure. As a result, HFPAF delivered a higher areal capacitance of 273.34 mF cm-2 at a current density of 0.1 mA cm-2 and retained 82.90% of its initial capacitance after 1000 charging-discharging cycles. Impressively the HFPAF showed an areal capacitance rate 81.27% retention after 500 bending cycles. The findings confirmed that the HFPAF possesses significant potential to use as an electrode material for developing solid state supercapacitors.
Keywords:
pineapple fiber
rGO/PANI
electroless NiP electromechanical stability
capacitance
electrode
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