Electrolytic molybdenum sulfides for thin-layer lithium power sources

• Published in: Journal of solid state electrochemistry 2008-09, Vol.12 (9), p.1151-1157
• Main Authors: Shembel, E., Apostolova, R., Kirsanova, I., Tysyachny, V.
• Format: Article
• Language: English
• Subjects: Analytical Chemistry; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemistry; Energy Storage; Original Paper; Physical Chemistry
• ISSN: 1432-8488; 1433-0768
• DOI: 10.1007/s10008-007-0463-5

The active molybdenum sulfide compound Mo 2 S 3 , which should be considered as a cathode material for thin-layer rechargeable power source, has been produced by electrolysis. Using impedance spectroscopy and potential relaxation method after current interruption, the kinetic parameters of lithium intercalation in electrolytic Mo 2 S 3 have been obtained. Activation energy of Li + migration in electrolyte (13.76 kJ/mol), charge transfer through the Mo 2 S 3 electrode/electrolyte interface (38.8 kJ/mol), and Li + diffusion in a solid phase (57.3 kJ/mol) have also been established. Taking into account the coefficient data of charge mass transfer in a solid phase and the reaction rate coefficient of charge transfer through the interface electrode/electrolyte within the temperature range 20–50 °C, the stage of Li + transfer in a solid phase has been determined as a limiting stage for lithium intercalation in electrolytic molybdenum sulfide Mo 2 S 3 .