Studies of the conductivity of ionomer membranes are essential because of their use in electrochemical devices and the need for low ionic resistances. Accurate measurement of specific conductivity poses a significant challenge in terms of experimental methodology. A.C. impedance spectroscopy is being used in our laboratory as a means for measuring the conductivity.
Our studies are leading to materials with interesting bicontinous morphologies in which a percolation network of ionic sites is encapsulated by non-ionic domains to yield mechanically robust materials with high proton conductivity.
Conductivity of proton exchange membranes as a function of temperature.
Morphologies (TEMs) of ionically-conducting block copolymers prepared at SFU