Solid polymer electrolyte based on PEO/PVDF/Mg(ClO4)2-[EMIM][ESO4] system for rechargeable magnesium ion batteries.

Autor: Guzmán-Torres, Jesús, González-Juárez, Edgar, de la Luz Hernández-Nieto, María, Espinosa-Roa, Arián, Sánchez, Eduardo M.
Zdroj: Ionics; Jun2023, Vol. 29 Issue 6, p2341-2349, 9p
Abstrakt: Solid polymer electrolyte (SPE) membranes were prepared using the solution-cast technique by mixing polyethylene oxide/polyvinylidene fluoride/magnesium perchlorate (PEO/PVDF/Mg(ClO4)2) ternary system with concentrations of 10, 20, 30, and 40 wt. % of the ionic liquid (IL) 1-ethyl-3-methylimidazolium ethyl sulfate [EMIM][ESO4]. The SPE membrane of SPE:IL (60:40 wt. %) demonstrated several electrochemical properties that satisfy a potential application in rechargeable magnesium ion batteries (MIBs) such as good conductivity at room temperature (~ 5.4 × 10−5 S cm−1) and high Mg2+ ion transport number ( t Mg 2 + ∼ 0.34 ). The results by X-ray diffraction (XRD) revealed an amorphous structure, which favored the diffusion of Mg2+ ions within the SPE structure. In addition, differential thermal analysis (DTA) showed the melting point at ~ 329 K. Fourier transform infrared spectroscopy (FTIR) confirmed the presence of characteristic functional groups in SPE membrane, identified by the appearance of the absorption bands C–O–C, CH2, C–O, ClO4−, and C–O–S–O. The electrochemical stability window of ~ 4.2 V was determined using linear sweep voltammetry (LSV). [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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