Abstract
Step potential electrochemical spectroscopy data of lithium anode cells using VSe2−ySy(0≤y≤0.5) compounds as cathode material and LiClO4 solutions in PC as electrolyte were studied. On increasing y, a lower extension of the intercalation process was observed, due to the loss of a second insertion step corresponding to lithium ion occupancy of tetrahedral sites. In contrast, the reaction rate increased with sulfur content. VSe2−ySy/LiCoO2 lithium-ion cells were cycled to test the electrochemical behaviour of the vanadium chalcogenides as anodic material. A better capacity retention was observed for y = 0.3. The effect of current density on the performance of the cells was also evaluated.
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GUZMA´N , R., LAVELA , P., MORALES , J. et al. VSe2−ySy electrodes in lithium and lithium-ion cells. Journal of Applied Electrochemistry 27, 1207–1211 (1997). https://doi.org/10.1023/A:1018427802699
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DOI: https://doi.org/10.1023/A:1018427802699