Preparation of Fast Proton-Conducting Phosphate Glass-Derived Hydrogels and their Electrochemical Properties
When fine-sized 45ZnO·55P2O5 glass powders were mixed with water, hydration immediately occurred, resulting in the formation of a viscous hydrogel. 31P MAS-NMR spectra showed that the hydrogel contains orthophosphates and long polyphosphates. 45ZnO·55P2O5 glass-derived hydrogel (45ZP gel) showed high conductivities of 9.9 mS/cm at 30 °C. The conductivities were related to the proton amount in the hydrogel. The electric double-layer capacitor (EDC) cell for the 45ZP gel showed no oxidation-reduction processes in the range of 0~1 V and the specific capacities of 2.40 F/g. The possibility as an EDC electrolyte may be related to the conductivities of the hydrogels.
T. Chandra, K. Tsuzaki, M. Militzer and C. Ravindran
T. Akamatsu et al., "Preparation of Fast Proton-Conducting Phosphate Glass-Derived Hydrogels and their Electrochemical Properties", Advanced Materials Research, Vols. 15-17, pp. 327-332, 2007