Studies on PEO-BMImHSO[sub 4] solid polymer electrolyte

Abstract

Polymer electrolyte membrane based on Polyethylene oxide/1-Butyl-3-methylimidazolium hydrogen sulfate (PEO-BMImHSO4) is prepared. The highest room temperature ionic conductivity of the membrane is obtained as ~ 4.27 × 10 -5 Scm -1 . Ion dynamics is studied using dielectric measurements which reveal translational motion of the ions in the prepared polymer electrolyte. The loss tangent (tan į) reflects faster ion hoping in the electrolyte but at higher concentration of IL, hoping rate receives tapering.

Acidic Ionic Liquids

“…624−626 The protic ionic liquids studied in this application include 1vinylimidazolium trifluoromethanesulfonate [(CH 2 CH)-Him][OTf], 627 1-methyl-imidazolium trifluoromethanesulfonate [C 1 Him][OTf], 628 and polymer electrolyte membranes based on poly(ethylene oxide)/1-butyl-3-methylimidazolium hydrogen sulfate [ 4 C 4 C 1 im][HSO 4 ]. 629 In another approach the acid retention capability of poly(4,4′-diphenylether-5,5′bibenzimidazole) (OPBI) nanocomposite membranes in fuel cells could be enhanced by incorporating protic ionic liquids. 625 In this case silica nanoparticles of 25 nm size were prepared, successfully modified with phosphate anion containing imidazolium AILs and were incorporated in OPBI by solution blending method.…”

“…Many research groups have studied the use of protic ionic liquids as a component in composite proton exchange membranes (PEMs) for the next generation fuel cells. − The protic ionic liquids studied in this application include 1-vinylimidazolium trifluoromethanesulfonate [(CH 2 CH)­Him]­[OTf], 1-methyl-imidazolium trifluoromethanesulfonate [C 1 Him]­[OTf], and polymer electrolyte membranes based on poly­(ethylene oxide)/1-butyl-3-methylimidazolium hydrogen sulfate [ 4 C 4 C 1 im]­[HSO 4 ] . In another approach the acid retention capability of poly­(4,4′-diphenylether-5,5′-bibenzimidazole) (OPBI) nanocomposite membranes in fuel cells could be enhanced by incorporating protic ionic liquids .…”