A NOVEL TECHNIQUE FOR ESTIMATION OF THE SOLID ELECTROLYTE INTERPHASE FILM RESISTANCE FOR LI-ION BATTERIES

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu

Tutkijat

Organisaatiot

Kuvaus

Solid electrolyte interphase (SEI) film resistance is an important parameter in the study of charge transfer kinetics of a Li-ion battery. The passive film affects diffusion process of Li ions. As such, it becomes essential to include film resistance in battery modelling. However, the traditional method of estimating the SEI film resistance is costly and time consuming. An indirect approach based on Ohm's law is thus presented in this paper. It relies on determining the interfacial polarisation from the difference of open-circuit voltage measured immediately after switching off the applied current and the equilibrium voltage. The technique is simple, easy to implement and can be used for a quick estimation of SEI film resistance with reasonable accuracy. For instance, average value of SEI film resistance for commercial LFP battery cell is measured as 0.004 Ohm . m(2), which was found to be consistent with the values determined using the impedance spectroscopy techhnique in the published literature for lithium-carbon film electrodes.

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoPROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION, 2018, VOL 6A
TilaJulkaistu - 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaASME International Mechanical Engineering Congress and Exposition - Pittsburgh, Yhdysvallat
Kesto: 9 marraskuuta 201815 marraskuuta 2018

Julkaisusarja

NimiASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Vuosikerta6A-144113

Conference

ConferenceASME International Mechanical Engineering Congress and Exposition
LyhennettäIMECE
MaaYhdysvallat
KaupunkiPittsburgh
Ajanjakso09/11/201815/11/2018

ID: 33996712