Electrochimica Acta An experimental and theoretical approach on the effect of presence of oxygen in milled graphite as lithium storage material
- Robledo, Carla Belén
- Thomas, Jorge Enrique
- Luque, Guillermina Leticia
- Leiva, Ezequiel Pedro M.
- Camara, Osvaldo Raul
- Barraco Diaz, Daniel Eugenio
- Visintin, Arnaldo
DOIAbstract
The effect of milling time on the morphology of graphite is characterized by XRD, SEM, BET, FTIR andXPS and the electrochemical response of the resulting materials upon lithium-ion absorption is analyzedusing different techniques. As milling time is increased, the particle size diminishes and the amountof oxygen content increases. Concomitantly, the capacity for lithium adsorption also increases becausenew adsorption sites become available due to more surface area and oxygen functional groups. Theseeffects are interpreted using first-principles calculations, which show that the presence of oxygenatedspecies promotes lithium adsorption at higher potentials. This capacity increase is probably not relevantfor lithium-ion batteries since there ...
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