Two and Three-Electrode Impedance Studies on 18650 Li-Ion Cells

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Two and three electrode impedance measurements were made on 18650 Li-ion cells at different QB temperatures ranging from 35 C to {minus}40 C. The ohmic resistance of the cell is nearly constant the temperature range studied although the total cell impedance increases by an order of magnitude in the same temperature range. In contrast to what is commonly believed, we show from our three-electrode impedance results that, the increase in cell impedance comes mostly from the cathode and not from the anode. Further, the anode and cathode contribute to both the impedance loops (in the NyQuist plot).

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14 p.

Creation Information

Nagasubramanian, Ganesan August 11, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 21 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Two and three electrode impedance measurements were made on 18650 Li-ion cells at different QB temperatures ranging from 35 C to {minus}40 C. The ohmic resistance of the cell is nearly constant the temperature range studied although the total cell impedance increases by an order of magnitude in the same temperature range. In contrast to what is commonly believed, we show from our three-electrode impedance results that, the increase in cell impedance comes mostly from the cathode and not from the anode. Further, the anode and cathode contribute to both the impedance loops (in the NyQuist plot).

Physical Description

14 p.

Notes

OSTI as DE00009718

Medium: P; Size: 14 pages

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  • Journal Name: Journal of the Electrochemical Society; Other Information: Submitted to Journal of the Electrochemical Society

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  • Report No.: SAND99-2093J
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 9718
  • Archival Resource Key: ark:/67531/metadc793286

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Office of Scientific & Technical Information Technical Reports

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  • August 11, 1999

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • April 7, 2017, 2:33 p.m.

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Nagasubramanian, Ganesan. Two and Three-Electrode Impedance Studies on 18650 Li-Ion Cells, article, August 11, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc793286/: accessed October 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.