Abstract
Solid Polymer blend electrolytes based on Polyvinyl alcohol (PVA) and Polyethylene glycol (PEG) complex with Mg(CH3COO)2 at different weight percent ratios were prepared using solution cast technique. Conductivity in the temperature range 303-373 K and transference number measurements have been employed to investigate the charge transport in this solid polymer electrolyte system. The highest conductivity is found to be 3.23 x 10 -5 S/cm at 373K for sample with 30 weight percent of Mg(CH3COO)2 in PVA/PEG blend matrix. Transport number data shows that the charge transport in this polymer electrolyte system is predominantly due to ions. Using this electrolyte, an electrochemical cell with configuration Mg /(PVA+PEG+Mg(CH3COO)2)/ (I2+C+electrolyte) was fabricated and its discharge characteristics profile has been studied.
Highlights
Solid polymer electrolytes have been a subject of great interest in recent years due to their potential applications in rechargeable batteries, fuel cells, sensors, electrochromic display devices, smart windows and other applications [1, 2]
Mg2+ ion conducting polymer blend electrolytes based on Polyvinyl alcohol/poly complexed with Mg(CH3COO)2 were prepared by using a solution casting technique
Using the polymer electrolyte films, solid-state electrochemical cells have been fabricated with the configuration Mg/(PVA+Polyethylene glycol (PEG)+Mg(CH3COO)2)/(I2+C+electrolyte) under a constant load of 100 kΩ
Summary
Solid polymer electrolytes have been a subject of great interest in recent years due to their potential applications in rechargeable batteries, fuel cells, sensors, electrochromic display devices, smart windows and other applications [1, 2]. Compared with systems based on liquid or gel electrolytes, solid polymer electrolytes are much more stable and have long life characteristics. Popular choice of polymer matrix for magnesium ion conductors [10-13], but very less work has done based on polymer blends. Pandey et al has prepared magnesium ion conducting gel polymer electrolytes dispersed with fumed silica for rechargeable magnesium battery application [20]. Mg2+ ion conducting polymer blend electrolytes based on Polyvinyl alcohol/poly (ethylene glycol) complexed with Mg(CH3COO) were prepared by using a solution casting technique. Several experimental techniques such as electrical and transport number measurements were performed to characterize these polymer electrolytes.
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