Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1298174 | Solid State Ionics | 2012 | 9 Pages |
Abstract
We studied Li/Li4Ti5O12 and Li/LiCoO2 half-cells as well as Li4Ti5O12/LiCoO2 coin-type battery cells at different state-of-charge over several cycles by means of electrochemical impedance spectroscopy. A simple equivalent-circuit model has been applied to probe changes at the internal interfaces of these batteries. The parameters of this model are used to follow the state-of-charge and state-of-health of the cells. Moreover plain empirical relations were introduced to accurately delineate those courses.
► Electrochemical impedance spectroscopy on complete lithium-ion battery cells ► Full cells with Li4Ti5O12 and LiCoO2 electrodes ► Degradation at internal interfaces ► Determination of state-of-charge and state-of health.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Nina Schweikert, Ralf Heinzmann, Andreas Eichhöfer, Horst Hahn, Sylvio Indris,