Influence of Ionic Liquid Selection on the Properties of Poly(Ethylene Glycol) Diacrylate‐Supported Ionogels as Solid Electrolytes

Three room‐temperature ionic liquids (ILs), differing only in anion identity [1‐ethyl‐3‐methylimidazolium tris(pentafluoroethyl)trifluorophosphate (EMI FAP), 1‐ethyl‐3‐methylimidazolium bis(trifluoromethanesulfonyl)imide (EMI TFSI), and 1‐ethyl‐3‐methylimidazolium tetracyanoborate (EMI TCB)], are em...

Full description

Saved in:
Bibliographic Details
Published in:ChemElectroChem 2014-04, Vol.1 (4), p.718-721
Main Authors: Visentin, Adam F., Alimena, Stephanie, Panzer, Matthew J.
Format: Article
Language:English
Subjects:
Anions
Crosslinking
Electrolytes
Electromagnetic interference
Gelation
gels
ion gels
Ionic conductivity
Ionic liquids
Ions
mechanical properties
Modulus of elasticity
Solid electrolytes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Three room‐temperature ionic liquids (ILs), differing only in anion identity [1‐ethyl‐3‐methylimidazolium tris(pentafluoroethyl)trifluorophosphate (EMI FAP), 1‐ethyl‐3‐methylimidazolium bis(trifluoromethanesulfonyl)imide (EMI TFSI), and 1‐ethyl‐3‐methylimidazolium tetracyanoborate (EMI TCB)], are employed to directly compare the mechanical and electrical responses of cross‐linked, poly(ethylene glycol) diacrylate (PEGDA)‐supported ionogel solid electrolytes. It is observed that the choice of IL influences the minimum amount of polymer required to create a non‐flowing gel, but not the value of the Young’s modulus for a given weight fraction of PEGDA above the gelation point. Furthermore, the relative decrease in ionic conductivity above the gel point is also found to be IL‐independent. These observations suggest that IL contributions to the character of these ionogels can be distinguished from the contributions of the supporting polymer scaffold. In addition, an extremely large ionic conductivity value (13.1 mS cm−1) is achieved at room temperature using EMI TCB at its gelation point (7.2 wt % PEGDA). Identity crisis? Three ionic liquids, differing only in their anions, are incorporated into cross‐linked, polymer‐supported ionogel electrolytes. Ionic‐liquid identity influences the minimum amount of polymer required to create a gel, but not the value of the Young's modulus or the relative loss in ionic conductivity for a given polymer weight fraction above the gelation point.
ISSN:2196-0216
2196-0216
DOI:10.1002/celc.201300205