Conductivity and Dielectric Studies of Lithium Trifluoromethanesulfonate Doped Polyethylene Oxide-Graphene Oxide Blend Based Electrolytes

Abstract

Series of polymer blend consisting of polyethylene oxide (PEO) and graphene oxide (GO) as co-host polymer were prepared using solution cast method. The most amorphous PEO-GO blend was obtained using 90 wt.% of PEO and 10 wt.% of GO as recorded by X-ray diffraction (XRD). Fourier transform infrared spectroscopy (FTIR) analysis proved the interaction between PEO, GO, lithium trifluoromethanesulfonate (LiCF3SO3), and ethylene sulfite (ES). Incorporation of 25 wt.% LiCF3SO3into the PEO-GO blend increases the conductivity to3.84±0.83×10-6 S cm−1. The conductivity starts to decrease when more than 25 wt.% salt is doped into the polymer blend. The addition of 1 wt.% ES into the polymer electrolyte has increased the conductivity to1.73±0.05×10-5 S cm−1. Dielectric studies show that all the electrolytes obey non-Debye behavior.

Effects of the electrolyte content on the electrical permittivity, thermal stability, and optical dispersion of poly(vinyl alcohol)–cesium copper oxide–lithium perchlorate nanocomposite solid‐polymer electrolytes

“…This led to an increase in the conductivity in the composite films. Similar results for τs in SPE films were reported elsewhere …”

Assessment on the mechanical, structural, and thermal attributes of green graphene‐based water soluble polymer electrolyte composites

“…A minor shift has also been observed in C─O absorption band of 1100 cm −1 to 1093 cm −1 and 1092 cm −1 in the FTIR scans of F6 and F7, respectively. This positional variation of absorption bands assets our confidence in complexation between PEO and GO and is in complete harmony with similar findings . The probable reaction sites among PEO, GO, and salt are O─H stretching band at 3412 cm −1 , C─H band at 2871 cm −1 , and C─O absorption band at 1100 cm −1 .…”

Li‐ion conductivity in PEO‐graphene oxide nanocomposite polymer electrolytes: A study on effect of the counter anion

“…The Li‐ion conductivity of a polymer electrolyte depends on the amount of free Li‐ions available for complexation with the polymer host, which in turn depends on the relative stability of the counter anion under the experimental condition. Ambipolar nature of CF 3 SO 3 Li makes it an important candidate as lithium salt in polymer electrolytes and at the same time assist in better segmental motion of polymer chains owing to their poor columbic voltage . The presence of bulky anion in LiTFSI salt makes it an alternative choice for PEO–Li salt matrix formation as the salt can easily breakdown to produce mobile Li + ions .…”