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OCV Hysteresis in Li-Ion Batteries including Two-Phase Transition Materials
Joint Authors
Roscher, Michael A.
Bohlen, Oliver
Vetter, Jens
Source
International Journal of Electrochemistry
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-05-29
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The relation between batteries' state of charge (SOC) and open-circuit voltage (OCV) is a specific feature of electrochemical energy storage devices.
Especially NiMH batteries are well known to exhibit OCV hysteresis, and also several kinds of lithium-ion batteries show OCV hysteresis, which can be critical for reliable state estimation issues.
Electrode potential hysteresis is known to result from thermodynamical entropic effects, mechanical stress, and microscopic distortions within the active electrode materials which perform a two-phase transition during lithium insertion/extraction.
Hence, some Li-ion cells including two-phase transition active materials show pronounced hysteresis referring to their open-circuit voltage.
This work points out how macroscopic effects, that is, diffusion limitations, superimpose the latte- mentioned microscopic mechanisms and lead to a shrinkage of OCV hysteresis, if cells are loaded with high current rates.
To validate the mentioned interaction, Li-ion cells' state of charge is adjusted to 50% with various current rates, beginning from the fully charged and the discharged state, respectively.
As a pronounced difference remains between the OCV after charge and discharge adjustment, obviously the hysteresis vanishes as the target SOC is adjusted with very high current rate.
American Psychological Association (APA)
Roscher, Michael A.& Bohlen, Oliver& Vetter, Jens. 2011. OCV Hysteresis in Li-Ion Batteries including Two-Phase Transition Materials. International Journal of Electrochemistry،Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-513584
Modern Language Association (MLA)
Roscher, Michael A.…[et al.]. OCV Hysteresis in Li-Ion Batteries including Two-Phase Transition Materials. International Journal of Electrochemistry No. 2011 (2011), pp.1-6.
https://search.emarefa.net/detail/BIM-513584
American Medical Association (AMA)
Roscher, Michael A.& Bohlen, Oliver& Vetter, Jens. OCV Hysteresis in Li-Ion Batteries including Two-Phase Transition Materials. International Journal of Electrochemistry. 2011. Vol. 2011, no. 2011, pp.1-6.
https://search.emarefa.net/detail/BIM-513584
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-513584