Nafion 117™-SnO2 composite membranes were prepared by in-situ particle formation using an ion-exchange method. SnO2 was incorporated into Nafion 117ä membranes by ion-exchange in solutions of SnCl2 ∙2 H2O in methanol, followed by oxidation to SnO2 in air. By adjustment of the concentration of SnCl2 ∙ 2 H2O used in the ion-exchange step, compositions ranging from 2 to 8 wt% SnO2 with SnO2 homogeneously distributed as nanoparticles were obtained.
The prepared nanocomposite membranes were characterized by powder XRD, 119Sn MAS NMR spectroscopy, electrochemical impedance spectroscopy, water uptake, tensile stress-strain measurements and thermogravimetric analysis. A SnO2 content around 4 wt% gave a significant increase in membrane stiffness without losses in conductivity.
|Journal||Solid State Ionics|
|Number of pages||7|
|Publication status||Published - 2012|
|Event||15th International Conference on Solid State Protonic Conductors - Santa Barbara, United States|
Duration: 15. Aug 2010 → 19. Aug 2010
Conference number: 15
|Conference||15th International Conference on Solid State Protonic Conductors|
|Period||15/08/2010 → 19/08/2010|
- Composite polymer electrolyte
- Composite membrane
- Tin dioxide