Abstract
Development of effective ion conductors with high volumetric stability is essential for micro-electrochemical devices. Herein, we report the synthesis of orderly aligned proton conductors based on polyelectrolyte brushes grafted on the surface of free-standing and through-hole TiO2 nanotube array membranes. The proton conductivity observation of the formed membranes with partially and fully filled polymers indicates that the ionic segments close to the surface play major role on proton transportation through membranes. The formed membrane exhibits promising proton conductivity at elevated temperature (0.125Scm−1 at 140°C) and the proton conductivity remains stable within the test period of time (100h). The results provide a potential nanotechnology for preparation of orderly aligned ionic conductors not only for transportation of proton but also for other ions.
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