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Preparation of Zinc Phosphate Glass-Derived Hydrogels and Their Proton Conductivities

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Abstract:

When fine-sized 45ZnO·55P2O5 or 50ZnO·50P2O5 glass powders were mixed with distilled water, hydration immediately occurred, resulting in the formation of viscous hydrogels. 31P MAS-NMR spectra showed that the hydrogels contain orthophosphates and long-chain phosphates; no significant differences in their structures between the hydrogels were shown. The 45ZP gel and 50ZP gel showed high conductivities (e.g., 9.9 and 2.8 mS/cm, respectively, at 30°C). The conductivities were related to the proton amount in the hydrogel; the amount in the 45ZP gel was larger than that in the 50ZP gel. Electric double-layer capacitors (EDCs) were prepared using electrolytes consisting of the hydrogels. The specific capacities of the EDC cell for the 45ZP gel and 50ZP gel were 2.40 and 2.06 F/g, respectively. The possibility as an EDC electrolyte may be related to proton conductivities of the hydrogels.

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AICAM 2005 View Preview

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Periodical:

Advanced Materials Research (Volumes 11-12)

Pages:

153-158

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.11-12.153

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Online since:

February 2006

Authors:

T. Akamatsu, Toshihiro Kasuga, Masayuki Nogami, Dörte Stachel

Keywords:

Electric Double-Layer Capacitor, Hydrogel, Proton Conduction, Zinc Phosphate Glass

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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