Modeling the non-linearities of charge-transfers and solid electrolyte interphase resistances for a sodium-ion battery with a hard carbon electrode
Résumé
Sodium-ion batteries are a promising technology whose performance are getting closer to those of lithium-ion batteries. The electrochemical phenomena are mostly the same for these two technologies, but the sodium-ion battery studied in this paper has a negative electrode made of hard carbon "HC" in which different phenomenon occurs when state of charge "SoC" decreases. In this paper, we characterized this sodium-ion battery thanks to a physic-based model that can represent the non-linearities of the charge transfers and solid electrolyte interphase "SEI" resistances. In this initial study, we found that this model represented accurately the battery non-linearities for high SoC, making it able to characterize its charge transfers and SEI (eg. for diagnosis purpose). However, the model failed to represent the cell behavior below SoC 40-50%, suggesting that it should be improved for batteries with HC electrodes.
Domaines
Energie électrique
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Modeling the non-linearities of charge-transfers and solid electrolyte interphase resistances for a sodium-ion battery with a hard carbon electrode .pdf (542.54 Ko)
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