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A model for predicting capacity fade due to SEI formation in a commercial graphite/LiFePO4 cell
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Tillämpad elektrokemi.
KTH, Skolan för kemivetenskap (CHE), Kemiteknik, Tillämpad elektrokemi.ORCID-id: 0000-0001-9203-9313
2015 (engelsk)Inngår i: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 162, nr 6, s. A1003-A1007Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An aging model for a negative graphite electrode in a lithium-ion battery, for moderate currents up to 1C, is derived and fitted to capacity fade experimental data. The predictive capabilities of the model, using only four fitted parameters, are demonstrated at both 25°C and 45°C. The model is based on a linear combination of two current contributions: one stemming from parts of the graphite particles covered by an intact microporous solid-electrolyte-interface (SEI) layer, and one contribution from parts of the particles were the SEI layer has cracked due to graphite expansion. Mixed kinetic and transport control is used to describe the electrode kinetics.

sted, utgiver, år, opplag, sider
2015. Vol. 162, nr 6, s. A1003-A1007
Emneord [en]
Electrodes, Graphite, Graphite electrodes, Lithium alloys, Seebeck effect, Solid electrolytes, Electrode kinetics, Graphite particles, Linear combinations, Microporous solids, Mixed kinetics, Predictive capabilities, SEI formations, Transport control
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Identifikatorer
URN: urn:nbn:se:kth:diva-167007DOI: 10.1149/2.0641506jesISI: 000353009300030Scopus ID: 2-s2.0-84928318589OAI: oai:DiVA.org:kth-167007DiVA, id: diva2:813662
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QC 20150525

Tilgjengelig fra: 2015-05-25 Laget: 2015-05-21 Sist oppdatert: 2017-12-04bibliografisk kontrollert

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Ekström, HenrikLindbergh, Göran
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