Two and Three-Electrode Impedance Studies on 18650 Li-Ion Cells
Journal Article
·
· Journal of the Electrochemical Society
OSTI ID:9718
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).
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 9718
- Report Number(s):
- SAND99-2093J; TRN: AH200125%%27
- Journal Information:
- Journal of the Electrochemical Society, Other Information: Submitted to Journal of the Electrochemical Society; PBD: 11 Aug 1999
- Country of Publication:
- United States
- Language:
- English
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