Thermal
induced changes in crystal structure and electronic states of Li-ion cathode
materials based on Li–Mn–O–S system |
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| Authors: | R Dziembaj M Molenda |
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| Institution: | (1) Faculty of Chemistry, Jagiellonian University, Cracow, Poland, 30-060, Ingardena 3;(2) Regional Laboratory of Physicochemical Analyses and Structural Research, Cracow, Poland, 30-060, Ingardena 3 |
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| Abstract: | Sulphur substitution of oxygen in LiMn2O4
spinel destroyed the ideal symmetry of MnO6 octahedrons.
In consequence, the phase change at about room temperature is strongly retarded,
manifested by lowering heat of the transition and hysteresis of the temperature
dependence of electrical conductivity. The optimal conditions for preparation
of sulphur substituted spinel LiMn2O4–ySy
have been determined. |
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| Keywords: | DSC electrical conductivity Li-ion batteries oxysulphide spinel phase transition TG |
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