Thermal Properties, Conductivity, and Spin-lattice Relaxation of Gel Electrolyte Based on Low Molecular Weight Gelator and Solution of High Temperature Ionic Liquid. (20th May 2015)

• Record Type: Journal Article
• Authors: Bielejewski, Michał; Puszkarska, Anna; Tritt-Goc, Jadwiga
• Is Part Of: Electrochimica acta. Volume 165(2015)
• Page Start: 122
• Page End: 129
• Publication Date: 2015-05-20
• Subjects: high temperature ionic liquid -- low molecular weight gelator -- gel electrolytes -- thermal properties -- enhanced ionic conductivity -- spin-lattice relaxation; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.03.009
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Abstract: Gel electrolyte based on low molecular weight organic gelator methyl-4, 6-O-( p -nitrobenzylidene)-α-D-glucopyranoside was formed by the self-assembly phenomena in aqueous solution of high temperature ionic liquid tetramethylammonium bromide. The solidification process was based on sol-gel technique with controlled gelation temperature. When the temperature was below the characteristic gel-sol phase transition temperature, T gs, the gel electrolyte was solid-like. The gel electrolytes showed enhanced ionic conductivity to those of the pure electrolyte in liquid state in whole temperature range below T gs . The thermal stability, ionic conductivity and molecular dynamics investigated as a function of temperature and concentration of the gelator, together with the gel microstructure were performed to get some insight in to the origin of the enhanced conductivity properties. Intermolecular interaction between ion complexes and gelator aggregates was implicated by the data obtained and suggested as the origin of the conductivity enhancement effect.