TY  - JOUR
AU  - Friesen, Alex
AU  - Horsthemke, Fabian
AU  - Mönnighoff, Xaver
AU  - Brunklaus, Gunther
AU  - Krafft, Roman
AU  - Börner, Markus
AU  - Risthaus, Tim
AU  - Winter, Martin
AU  - Schappacher, Falko M.
TI  - Impact of cycling at low temperatures on the safety behavior of 18650-type lithium ion cells: Combined study of mechanical and thermal abuse testing accompanied by post-mortem analysis
JO  - Journal of power sources
VL  - 334
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2017-02817
SP  - 1 - 11
PY  - 2016
AB  - The impact of cycling at low temperatures on the thermal and mechanical abuse behavior of commercial 18650-type lithium ion cells was compared to fresh cells. Post-mortem analyses revealed a deposition of high surface area lithium (HSAL) metal on the graphite surface accompanied by severe electrolyte decomposition. Heat wait search (HWS) tests in an accelerating rate calorimeter (ARC) were performed to investigate the thermal abuse behavior of aged and fresh cells under quasi-adiabatic conditions, showing a strong shift of the onset temperature for exothermic reactions. HSAL deposition promotes the reduction of the carbonate based electrolyte due to the high reactivity of lithium metal with high surface area, leading to a thermally induced decomposition of the electrolyte to produce volatile gaseous products. Nail penetration tests showed a change in the thermal runaway (TR) behavior affected by the decomposition reaction. This study indicates a greater thermal hazard for LIB cells at higher SOC and experiencing aging at low temperature.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000387526100001
DO  - DOI:10.1016/j.jpowsour.2016.09.120
UR  - https://juser.fz-juelich.de/record/829000
ER  -