Details
| Original language | English |
|---|---|
| Pages (from-to) | 806-814 |
| Number of pages | 9 |
| Journal | Journal of power sources |
| Volume | 307 |
| Early online date | 1 Feb 2016 |
| Publication status | Published - 1 Mar 2016 |
Abstract
The aging of graphite anodes in prismatic lithium ion cells during a low temperature pulse charging regime was studied by electrical tests and post-mortem analysis. The capacity decrease and impedance increase mainly occurs in the beginning of cycling and lithium plating was identified as the major aging mechanism. The degradation and the local states of charge show an inhomogeneous distribution over the anode, which is confirmed from spatially resolved XRD studies and SEM combined with EDX performed on electrode cross sections. Comparing a charged cell with a discharged cell reveals that ca. 1/3 of the lithium is plated reversibly at the given SOH of 60%. It is proposed that high charge rates at low temperatures induce inhomogeneities of temperature and anode utilization resulting in inhomogeneous aging effects that accumulate over lifetime.
Keywords
- Charging method, Lithium plating, Lithium-ion battery, Low temperature aging, Post-mortem analysis, State-of-charge distribution
ASJC Scopus subject areas
- Energy(all)
- Renewable Energy, Sustainability and the Environment
- Energy(all)
- Energy Engineering and Power Technology
- Chemistry(all)
- Physical and Theoretical Chemistry
- Engineering(all)
- Electrical and Electronic Engineering
Sustainable Development Goals
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In: Journal of power sources, Vol. 307, 01.03.2016, p. 806-814.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Inhomogeneous degradation of graphite anodes in automotive lithium ion batteries under low-temperature pulse cycling conditions
AU - Burow, Daniel
AU - Sergeeva, Kseniya
AU - Calles, Simon
AU - Schorb, Klaus
AU - Börger, Alexander
AU - Roth, Christina
AU - Heitjans, Paul
PY - 2016/3/1
Y1 - 2016/3/1
N2 - The aging of graphite anodes in prismatic lithium ion cells during a low temperature pulse charging regime was studied by electrical tests and post-mortem analysis. The capacity decrease and impedance increase mainly occurs in the beginning of cycling and lithium plating was identified as the major aging mechanism. The degradation and the local states of charge show an inhomogeneous distribution over the anode, which is confirmed from spatially resolved XRD studies and SEM combined with EDX performed on electrode cross sections. Comparing a charged cell with a discharged cell reveals that ca. 1/3 of the lithium is plated reversibly at the given SOH of 60%. It is proposed that high charge rates at low temperatures induce inhomogeneities of temperature and anode utilization resulting in inhomogeneous aging effects that accumulate over lifetime.
AB - The aging of graphite anodes in prismatic lithium ion cells during a low temperature pulse charging regime was studied by electrical tests and post-mortem analysis. The capacity decrease and impedance increase mainly occurs in the beginning of cycling and lithium plating was identified as the major aging mechanism. The degradation and the local states of charge show an inhomogeneous distribution over the anode, which is confirmed from spatially resolved XRD studies and SEM combined with EDX performed on electrode cross sections. Comparing a charged cell with a discharged cell reveals that ca. 1/3 of the lithium is plated reversibly at the given SOH of 60%. It is proposed that high charge rates at low temperatures induce inhomogeneities of temperature and anode utilization resulting in inhomogeneous aging effects that accumulate over lifetime.
KW - Charging method
KW - Lithium plating
KW - Lithium-ion battery
KW - Low temperature aging
KW - Post-mortem analysis
KW - State-of-charge distribution
UR - http://www.scopus.com/inward/record.url?scp=84955242124&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2016.01.033
DO - 10.1016/j.jpowsour.2016.01.033
M3 - Article
AN - SCOPUS:84955242124
VL - 307
SP - 806
EP - 814
JO - Journal of power sources
JF - Journal of power sources
SN - 0378-7753
ER -