Effect of Methoxy Group on Physical and Electrolytic Properties of Propylene Carbonate

Abstract

A methoxymethyl group (CH 3 OCH 2 -) can exert the polar effect on the physical and electrochemical properties. We have investigated the effect of the substitution of a methyl group with a methoxymethyl group on the physical and electrolytic properties of propylene carbonate (PC or 4-methyl-1,3-dioxolan-2-one). The molar concentration of methoxypropylene carbonate (MetPC or 4-methoxymehyl-1,3-dioxolan-2-one) in an electrolytic solution was lower than that of PC. The viscosities of the electrolytic solutions in MetPC were considerably higher than those of the counterparts in PC. The ionic conductivity of the electrolytic solution was lower in MetPC. Nevertheless, the use of MetPC as an alternative single solvent led to the gravimetric capacitance comparable to that obtained for PC in the discharge of a measurement cell.

All Solid-State Symmetrical Activated Carbon Electrochemical Double Layer Capacitors Designed with Ionogel Electrolyte

“…Many studies aim at replacing acetonitrile by other solvents such as adiponitrile 1 or different carbonates. [2][3][4] Ionic liquids (ILs) are now envisioned as possible electrolyte for EDLCs. [5][6][7] However, the use of ionic liquids does not solve the problems related to possible leakage.…”