| Effect of Li2O on Physical, Structural, Thermal and Electrical
Properties of MgO-V2O5 Glasses |
Vimi Dua and Kulvir Singh*
Pages : 7-12
DOI : 10.1080/0371750X.2024.2274552 |
| Abstract |
| Three compositions 75V2O5-25MgO (MVL-0), 75V2O5-16MgO-9Li2O (MVL-9) and
75V2O5-13MgO-12Li2O (MVL-12) were synthesized by melt-quench technique. Addition
of Li2O instead of MgO promoted the devitrification of magnesium vanadate glass.
X-ray diffraction pattern showed the amorphous nature of MVL-0, while MVL-9 and
MVL-12 were seen to exhibit a lithium vanadium oxide phase with the presence of
some amorphous phase. Densities of the samples increased with the increase in
Li2O concentration. Raman spectra of MVL-0 exhibited broad band as compared to
the other samples; as Li2O concentration increased, the band became sharp including
the appearance of some more new bands. High electrical conductivity was observed
for MVL-12; ~9.615?10–5 S.cm–1 at 50oC to 1.96?10–3 S.cm–1 at 250oC, which is
comparable to the conductivity of standard cathode materials used in battery and
electrochemical fuel cells. So, these samples may be used as cathode materials due
to good conductivity at 250oC for battery and electrochemical fuel cells.
[Keywords: Glasses, Conductivity, Ceramics, Diffraction, Devitrification] |
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