Thermally stable ion conductive polymer composites containing imide-anion-type zwitterions

Design and properties of functional zwitterions derived from ionic liquids

“…Since ZIs are ionic compounds but do not migrate along with the potential gradient, they were expected to work as non-volatile polar solvents for guest salts. ZI/lithiumsalt complexes were mixed with poly(vinylidene fluoride-cohexafluoropropylene) (PVdF-HFP), 26,27 poly(methyl acrylate) (PMA), 28 poly(lithium acrylate) (PLiAC), 28 or nitrile rubber (poly(acrylonitrile-co-1,4-butadiene) (NBR)). 29 Thermal analysis revealed that these polymer gel electrolytes were thermally stable over 300 1C.…”

“…The ionic conductivity and thermal properties of two kinds of polybetaines were compared, i.e., (25,26) and (27,28). The ionic conductivity of polybetaines with an imidazolium cation on the main-chain, 25 and 26, containing an equimolar amount of LiTf 2 N to the imidazolium unit, were in the range of 10 À8 to 10 À9 S cm À1 .…”

Strong Tendency of Homeotropic Alignment and Anisotropic Lithium Ion Conductivity of Sulfonate Functionalized Zwitterionic Imidazolium Ionic Liquid Crystals

“…Zwitterionic-type ionic liquids (ZILs) constitute a unique subclass of ILs composed of both positive and negative charge in an intramolecular form . They can dissolve a variety of inorganic salts due to their high dipole moment and are thus proven to be excellent ion dissociators, useful for liquidizing solid salts or strong acids. − They have been reported as good ion carriers for electrochemical applications due to their lack of component ion-pair migration. − ZILs with suitable design could provide good target ion transporting abilities to overcome the disadvantages of conventional ILs, such as their low target ion transport number and lack of selectivity, as reported by Ohno and co-workers . Over the past decade, task specific sulfonate (SO 3 – ) functionalized zwitterionic imidazolium ionic liquids (SO 3 – ImZILs) have attracted great interest for use as ion conductive matrixes or electrolytes for batteries, ,− antifouling thin films, nanoparticle stabilizers, catalysts, − N-heterocyclic carbene ligands, − ion exchange membranes, , and for separation processes. , The oxygen atoms of the SO 3 – group are negatively charged and, in principle, can coordinate with positive ions.…”

Design and evaluation of imidazolium cation-based ionic liquids having double-armed anions for selective cation conduction

“…Various types of PILs such as polycations [3], polyanions [3], copolymers [4], polymer composites [5,10] have been designed so far. These polymers gave thin film conductors suitable as light and thin polymer electrolytes.…”