Glassy materials are promising intercalation compounds, due to their open network structure and absence of grain boundaries. Some glasses containing alkali ions and a high concentration of transition metal ions can present mixed ionicelectronic conductivity and are therefore potential candidates for application as cathode material in Li-ion batteries. The present work is devoted to the ternary system x Li 2 O -(1-x) [0.3V 2 O 5 -0.7 TeO 2 ] with 0 ≤ x ≤ 0.4. These compounds were prepared by heat treatment in air at 800°C followed by traditional quenching. Raman spectroscopy and 51 V nuclear magnetic resonance measurements were performed in order to highlight the structural short range order modifications induced by the introduction of the Li 2 O network modifier. These structural effects can be related to the electrical behaviour, as studied by complex impedance spectroscopy measurements.
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