TY  - JOUR
AU  - Friesen, Alex
AU  - Mönnighoff, Xaver
AU  - Börner, Markus
AU  - Haetge, Jan
AU  - Schappacher, Falko M.
AU  - Winter, Martin
TI  - Influence of temperature on the aging behavior of 18650-type lithium ion cells: A comprehensive approach combining electrochemical characterization and post-mortem analysis
JO  - Journal of power sources
VL  - 342
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2017-07076
SP  - 88 - 97
PY  - 2017
AB  - The understanding of the aging behavior of lithium ion batteries in automotive and energy storage applications is essential for the acceptance of the technology. Therefore, aging experiments were conducted on commercial 18650-type state-of-the-art cells to determine the influence of the temperature during electrochemical cycling on the aging behavior of the different cell components. The cells, based on Li(Ni0.5Co0.2Mn0.3)O2 (NCM532)/graphite, were aged at 20 °C and 45 °C to different states of health. The electrochemical performance of the investigated cells shows remarkable differences depending on the cycling temperature. At contrast to the expected behavior, the cells cycled at 45 °C show a better electrochemical performance over lifetime than the cells cycled at 20 °C. Comprehensive post-mortem analyses revealed the main aging mechanisms, showing a complex interaction between electrodes and electrolyte. The main aging mechanisms of the cells cycled at 45 °C differ strongly at contrast to cells cycled at 20 °C. A strong correlation between the formed SEI, the electrolyte composition and the electrochemical performance over lifetime was observed.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000396186300012
DO  - DOI:10.1016/j.jpowsour.2016.12.040
UR  - https://juser.fz-juelich.de/record/838473
ER  -