Abstract
The synthesize of solid polymer electrolyte (SPE) based on polyethylene oxide (PEO), NaClO4 and nano-SiO2 was carried out by solution cast technique. Nano-SiO2 was synthesized from sugarcane bagasse using sol-gel method. FTIR analysis was carried out to investigate the bonding between nano-SiO2 and PEO/NaClO4. The morphology of the SPE was characterized using SEM. XRD and DSC analysis showed that SPE crystallinity decreased as nano-SiO2 concentration was increased. Mechanical analyses were conducted to characterize the SPE tensile strength and elongation at break. EIS analysis was conducted to measure SPE ionic conductivity. The PEO/NaClO4 SPE with the addition of 5% nano-SiO2 from sugarcane bagasse at 60 °C produced SPE with the highest ionic conductivity, 1.18 × 10−6 S/cm. It was concluded that the addition of nano-SiO2 increased ionic conductivity and interface stability at the solid polymer electrolyte-PEO/NaClO4.
Highlights
Battery is an energy storage device that is widely used in today daily life
The solid polymer electrolyte (SPE) was fabricated from polyethylene oxide (PEO), NaClO4 and nano‐SiO2 by casting method
X-ray Diffraction (XRD) diffractogram at 2θ = 19° and 23° shows that the crystallinity of the SPE decreased as nano‐SiO2 increased which was confirmed by differential scanning calorimetry (DSC)
Summary
Battery is an energy storage device that is widely used in today daily life. Currently, lithium-ion batteries have been well developed and have become the frontier in green energy sources [1]. Solid polymer electrolyte has not been applied in commercial batteries because of its low ionic conductivity (10−8 S/cm at room temperature) and electrochemical stability [7]. PEO based solid polymer electrolyte has good flexibility and plasticity as well as good contact ability and interface compatibility with the electrodes [8] It has a crystalline phase at room temperature which can affect its conductivity. The interaction originating from the SiO2 surface can cause stability of the interface between the filler and polymer matrix which in turn will suppress the crystallinity of the polymer and increase the ionic conductivity of solid electrolyte polymers [21]. Based on the background that has been described, a solid polymer electrolyte consisting of PEO/NaClO4 with nano-SiO2 from sugarcane bagasse as a filler is proposed to reduce PEO crystallinity and increase its ionic conductivity
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