Study on Ion Conductivity and Crystallinity of Composite Polymer Electrolytes Based on Poly(ethylene oxide)/Poly(acrylonitrile) Containing Nano-Sized Al<SUB>2</SUB>O<SUB>3</SUB> Fillers

Abstract

In this paper, composite polymer electrolytes were prepared by a blend of poly(ethylene oxide) (PEO) and poly(acrylonitrile) (PAN) as a polymer matrix, ethylene carbonate as a plasticizer, LiClO4 as a salt, and by containing a different content of nano-sized Al2O3. The composite films were prepared by using the solution casting method. The crystallinity and ionic conductivity of the polymer electrolytes was investigated using X-ray diffraction (XRD) and AC impedance method, respectively. The morphology of composite polymer electrolyte film was analyzed by SEM method. From the experimental results, by increasing the Al2O3 content, the crystallinity of PEO was reduced, and the ionic conductivity was increased. In particular, by a doping of 15 wt.% Al2O3 in PEO/PAN polymer blend, the CPEs showed the superior ionic conductivity. However, when Al2O3 content exceeds 15 wt.%, the ionic conductivity was decreased. From the surface morphology, it was concluded that the ionic conductivity was decreased because the CPEs showed a heterogenous morphology due to immiscibility or aggregation of the ceramic filler within the polymer matrix.

Impedance Spectroscopy as a Novel Approach to Probe the Phase Transition and Microstructures Existing in CS:PEO Based Blend Electrolytes

“…6a–c . The two obvious peaks appeared at 2θ ranges from 17° to 23° are ascribed to crystalline peaks of PEO as reported in literature 16 , 19 , 22 , 24 , 25 . Noticeably with increasing PEO concentration the strength of crystalline peaks owing to PEO increased and the amorphous phases are suppressed.…”

“…One of the most promising alternate choices of enhancing the amorphous phase and increase of ionic conductivity in PEO based electrolyte systems is blending of PEO with a suitable higher amorphous polymer 19 , 20 . Various polymers such as polyvinyl pyrrolidone (PVP) 19 , boroxine ring polymer (BP) 20 , polyacrylonitrile (PAN) 21 , 22 , and poly (dithiooxamide) (PDTOA) 23 has been blended with PEO based electrolytes. The crystallinity of PEO based electrolytes extensively studied by various researchers through the XRD and DSC measurements 21 , 22 , 24 , 25 .…”

“…Various polymers such as polyvinyl pyrrolidone (PVP) 19 , boroxine ring polymer (BP) 20 , polyacrylonitrile (PAN) 21 , 22 , and poly (dithiooxamide) (PDTOA) 23 has been blended with PEO based electrolytes. The crystallinity of PEO based electrolytes extensively studied by various researchers through the XRD and DSC measurements 21 , 22 , 24 , 25 . Several authors reported the T m value for PEO-based solid polymer electrolytes.…”

Enhancing the performance of SPEEK polymer electrolyte membranes using functionalized TiO2 nanoparticles with proton hopping sites

“…The amorphous structure of nanocomposite membranes is useful for the enhancement of ionic conductivity. 41,42 However, AFT incorporation further (more than 10%) slightly increases the peak intensity likely because the aggregation of nanoparticles.…”

Conducting and interface characterization of carbonate-type organic electrolytes containing EMImBF4as an additive against activated carbon electrode

“…EDLCs are energy storage devices that collect energy between the electrode and electrolyte interface, and EDLCs have high power density and long cycle life [4][5][6][7][8]. However, their energy density is much lower than those of rechargeable batteries.…”