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State of charge dependency of the overvoltage generated in commercial Li-ion cells

Author
Ovejas, V.J.; Cuadras, A.
Type of activity
Journal article
Journal
Journal of power sources
Date of publication
2019-04-01
Volume
418
First page
176
Last page
185
DOI
10.1016/j.jpowsour.2019.02.046
Project funding
Life cycle, business and entropy analyses in batteries - subproject 1
Repository
http://hdl.handle.net/2117/167826 Open in new window
URL
https://www.sciencedirect.com/science/article/pii/S0378775319301715 Open in new window
Abstract
The overvoltage that is produced in the cells under operation limits the capacity and power they can deliver. A detailed study about the mechanisms that contribute to that overvoltage—and thus to their lifetime—is required for optimizing the use of batteries as well as their manufacturing process. We investigate galvanostatic discharge at low and moderate rates in an LCO-NMC/graphite cell in order to quantify the ohmic voltage drop and activation and concentration polarizations. For doing s...
Citation
Ovejas, V.J.; Cuadras, A. State of charge dependency of the overvoltage generated in commercial Li-ion cells. "Journal of power sources", 1 Abril 2019, vol. 418, p. 176-185.
Keywords
Activation polarization, Concentration polarization, Half-cells, NMC, Overvoltage, Phase transformation
Group of research
EPIC - Energy Processing and Integrated Circuits

Participants