Ion transport in polymer electrolytes

摘要: Transference numbers determined by the classical Hittorf method for liquid polymer electrolytes (solutions of NaSCN etc. in copolymers ethylene and propylene oxide) yield consistently low values t+(ca. 0.05). This points to a model which cations are immobilised interaction with polymeric solvent anions principal charge carriers, seemingly at variance successful operation prototype lithium batteries. paradox is resolved postulating ‘transport’ Li+ ions from anode cathode via diffusion ion pairs down concentration gradient. A similar mechanism would also explain higher 0.5) ‘steady-state current’ reported elsewhere literature.