Dielectric properties and electrical conductivity of Ternary Zinc Magnesium Phosphate Glass-derived hydrogel
Leakage problem and contact resistance are the major problems for liquid electrolyte and solid-state electrolyte, respectively. In this research, a highly viscous ternary phosphate glass-derived hydrogel was proposed as high proton-conducting electrolyte that may overcome the problems and applicabl...
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| Format: | Thesis |
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| Language: | English |
| Subjects: | |
| Online Access: | http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77084/1/Page%201-24.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77084/2/Full%20text.pdf http://dspace.unimap.edu.my:80/xmlui/bitstream/123456789/77084/4/Nor%20Asfazila.pdf |
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| Summary: | Leakage problem and contact resistance are the major problems for liquid electrolyte and solid-state electrolyte, respectively. In this research, a highly viscous ternary phosphate glass-derived hydrogel was proposed as high proton-conducting electrolyte
that may overcome the problems and applicable to power storage devices. Before hydration, a series of ternary zinc magnesium phosphate glasses having the composition (ZnO)30.(MgO)x.(P2O5)70-x with x = 5, 8, 10, 13, 15, 18, and 20 mole % were prepared by melt quenching technique. All the samples were confirmed in amorphous phase by X-ray diffraction (XRD) analysis. Glass powder from each glass samples were successfully transformed into hydrogel product via hydration after reaction with
distilled water (DW) with ratio mixture 1:0.5 and 1:1. Density, molar volume and
Fourier Transform Infrared (FTIR) spectroscopic measurement have been used to
characterize the physical properties of solid glass and glass-derived hydrogel. Result of
both density and molar volume was correlated with network polymerization. IR spectra
of solid glass and hydrogel were measured in the wavenumber range of 650 cm-1 to
4000 cm-1 at ambient temperature. It was found that the absorption band of phosphorusoxygen-
metal (P-O-M) bonding which present in glass powder structure disappeared in
the hydrogel structure due to hydration process. However, the divalent cations may
attach to phosphate chain by chelation. The dielectric properties of the hydrogel samples
were characterized by impedance analyzer in frequency range of 4 Hz to 1 MHz. It was
revealed that CZ05 (1:1) hydrogel sample has highest dielectric constant, dielectric loss
and electrical conductivity values among studied samples. |
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