1473590
doi
10.1016/j.jpowsour.2018.06.035
oai:zenodo.org:1473590
user-eu
Hu Li
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
Dmitri Danilov
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
Lu Gao
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
Jiang Zhou
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
Rüdiger-A. Eichel
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
Yong Yang
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
Peter H. L. Notten
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
Temperature-dependent cycling performance and ageing mechanisms of C6/ LiNi1/3Mn1/3Co1/3O2 batteries
Dongjiang Li
Forschungszentrum Jülich, Fundamental Electrochemistry (IEK-9), D-52425 Jülich, Germany
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Layered-oxid Cathode materials; Solid-Electrolyte-Interface; Cathode-Electrolyte-Interface; Capacity loss; Electromotive force; Derivative voltage analysis
<p>Ageing mechanisms of NMC-based Li-ion (C6/LiNi1/3Mn1/3Co1/3O2) batteries have been investigated under various cycling conditions. The electromotive force (EMF) curves are regularly determined by mathematical extrapolation of voltage discharge curves. The irreversible capacity losses determined from the EMF curves have been investigated as a function of time and cycle number. Parasitic side reactions, occurring at the cathode and anode, are considered to be responsible for charge-discharge efficiency (CDE) and discharge-charge efficiency (DCE), respectively. The recently developed non-destructive voltage analysis method is also applied to the present battery chemistry. The decline of the second plateau of the 〖dV〗_EMF/dQ curves upon cycling is considered to be an indicator of graphite degradation whereas the development of the third peak in these derivative curves is considered to be an indicator for electrode voltage slippage. XPS measurements confirm the deposition of transition-metal elements at the graphite electrode, indicating dissolution of these metals from the cathode. Furthermore, XPS analyses confirm the existence of a Cathode-Electrolyte-Interface (CEI) layer. The outer CEI layer is composed of various compounds, such as carbonate-related Li salts, LiF and NiF2, etc., while the inner CEI layer is dominantly composed of fluoride-related compounds, such as NiF2. Finally, a cathode degradation model including transition-metal dissolution and structure transformation is proposed.</p>
Zenodo
2018-06-08
info:eu-repo/semantics/article
1473589
user-eu
award_title=DEsign and MOdelling for improved BAttery Safety and Efficiency; award_number=769900; award_identifiers_scheme=url; award_identifiers_identifier=https://cordis.europa.eu/projects/769900; funder_id=00k4n6c32; funder_name=European Commission;
1579534894.121139
3739043
md5:0dfb26fbec29501a7e41c217d402e1ce
https://zenodo.org/records/1473590/files/Temperature dependent cycling performance and ageing mechanisms.pdf
public