TY  - JOUR
AU  - Mönnighoff, Xaver
AU  - Friesen, Alex
AU  - Konersmann, Benedikt
AU  - Horsthemke, Fabian
AU  - Grützke, Martin
AU  - Winter, Martin
AU  - Nowak, Sascha
TI  - Supercritical carbon dioxide extraction of electrolyte from spent lithium ion batteries and its characterization by gas chromatography with chemical ionization
JO  - Journal of power sources
VL  - 352
SN  - 0378-7753
CY  - New York, NY [u.a.]
PB  - Elsevier
M1  - FZJ-2018-04812
SP  - 56 - 63
PY  - 2017
AB  - The aging products of the electrolyte from a commercially available state-of-the-art 18650-type cell were investigated. During long term cycling a huge difference in their performance and lifetime at different temperatures was observed. By interpretation of a strong capacity fading of cells cycled at 20 °C compared to cells cycled at 45 °C a temperature depending aging mechanism was determined. To investigate the influence of the electrolyte on this fading, the electrolyte was extracted by supercritical fluid extraction (SFE) and then analyzed by gas chromatography (GC) with electron impact (EI) ionization and mass selective detection. To obtain more information with regard to the identification of unknown decomposition products further analysis with positive chemical ionization (PCI) and negative chemical ionization (NCI) was performed. 17 different volatile organic aging products were detected and identified. So far, seven of them were not yet known in literature and several formation pathways were postulated taking previously published literature into account.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000401206100007
DO  - DOI:10.1016/j.jpowsour.2017.03.114
UR  - https://juser.fz-juelich.de/record/851110
ER  -