Different carbon processes for lithium-sulfur batteries

HOFFMANN, N.; ORTIZ, M.G.; THOMAS, J.E.; VISINTIN, A.

Journal of Physics: Conference Series

Institute of Physics

Lugar: Londres; Año: 2022 vol. 2382 p. 1 - 8

1742-6588

In this work, different carbon modification processes have been employed and the results have been compared with the unmodified Super-P carbon. The active materials were used in respective cathodes materials for Li/S batteries. The electrochemical performance was studied by galvanostatic charge-discharge cycling, cyclic voltammetry, electrochemical impedance spectroscopy and rate capability. CV measurements showed the modified carbons started out charging and discharging at set voltages, with their peaks broadening as part of the cycling-induced decay. It was found that the carbon processed with nitric acid delivered the highest capacity retention after 100 cycles at C/10. The results indicate that the modification of carbon with nitric acid could be promote the decrease of the shuttle effect.