001021033 001__ 1021033
001021033 005__ 20240709082154.0
001021033 037__ $$aFZJ-2024-00493
001021033 1001_ $$0P:(DE-Juel1)190423$$aAhrens, Lara$$b0$$eCorresponding author
001021033 1112_ $$aThe 20th of International Microscopy Congress$$cBusan$$d2023-09-10 - 2023-09-15$$gIMC20$$wSouth Korea
001021033 245__ $$aInvestigation of the Degradation Mechanism of Ni-rich NMC Cathode Material in Lithium-Ion Batteries
001021033 260__ $$c2023
001021033 3367_ $$033$$2EndNote$$aConference Paper
001021033 3367_ $$2DataCite$$aOther
001021033 3367_ $$2BibTeX$$aINPROCEEDINGS
001021033 3367_ $$2DRIVER$$aconferenceObject
001021033 3367_ $$2ORCID$$aLECTURE_SPEECH
001021033 3367_ $$0PUB:(DE-HGF)6$$2PUB:(DE-HGF)$$aConference Presentation$$bconf$$mconf$$s1705384456_13775$$xAfter Call
001021033 520__ $$aLithium-ion batteries (LIBs) are state-of-the-art battery systems for electrical vehicles (EVs) and thus a key-technology for an emission-reduced future [1]. Besides anode and electrolyte, the cathode site plays an important role for the performance of a battery. Ni-rich NMC (LixNiyMnzCo1-y-zO2, with x > 0, y > 0.6) is the most promising candidate of cathode materials due to its high capacity, high energy density and low costs [1]. However, structural instability is a drawback of a high nickel content leading e.g., to phase transition under high voltages, washing and heat treatment [1,2]. Although it is clear, that a phase transition from layered structure (space group R-3m) over an intermediate spinel-phase (space group Fd-3m) to rocksalt structure (space group Fm-3m) takes place, it is controversially discussed how fast and thick the rocksalt layer grows and if it has a positive influence on the electrochemical performance up to a certain thickness [3-5].One urgent question is, how fast and heavily Ni-rich NMC degrades if it is held at high voltages for long timespans. To answer this question, battery cells were set to 4.5 V for a varying number of days.The formed rocksalt layers were imaged at the atomic scale using scanning transmission electron microscopy (STEM) to obtain valuable information about the phase transition occurring at the surface of the particles. Figure 1 shows STEM images of a battery cell after 30 days, where a pronounced rocksalt layer of roughly 20 nm is visible, indicating degradation of the cathode.The time-dependent study provides a better understanding of the aging of Ni-rich NMC cathodes caused by cut-off voltages.
001021033 536__ $$0G:(DE-HGF)POF4-1223$$a1223 - Batteries in Application (POF4-122)$$cPOF4-122$$fPOF IV$$x0
001021033 7001_ $$0P:(DE-HGF)0$$aVettori, Kilian$$b1
001021033 7001_ $$0P:(DE-Juel1)180432$$aBasak, Shibabrata$$b2
001021033 7001_ $$0P:(DE-Juel1)156123$$aEichel, Rüdiger-A.$$b3$$ufzj
001021033 7001_ $$0P:(DE-Juel1)130824$$aMayer, Joachim$$b4$$ufzj
001021033 909CO $$ooai:juser.fz-juelich.de:1021033$$pVDB
001021033 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)190423$$aForschungszentrum Jülich$$b0$$kFZJ
001021033 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)180432$$aForschungszentrum Jülich$$b2$$kFZJ
001021033 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)156123$$aForschungszentrum Jülich$$b3$$kFZJ
001021033 9101_ $$0I:(DE-588b)36225-6$$6P:(DE-Juel1)156123$$aRWTH Aachen$$b3$$kRWTH
001021033 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)130824$$aForschungszentrum Jülich$$b4$$kFZJ
001021033 9101_ $$0I:(DE-588b)36225-6$$6P:(DE-Juel1)130824$$aRWTH Aachen$$b4$$kRWTH
001021033 9131_ $$0G:(DE-HGF)POF4-122$$1G:(DE-HGF)POF4-120$$2G:(DE-HGF)POF4-100$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-1223$$aDE-HGF$$bForschungsbereich Energie$$lMaterialien und Technologien für die Energiewende (MTET)$$vElektrochemische Energiespeicherung$$x0
001021033 9141_ $$y2023
001021033 920__ $$lyes
001021033 9201_ $$0I:(DE-Juel1)IEK-9-20110218$$kIEK-9$$lGrundlagen der Elektrochemie$$x0
001021033 9201_ $$0I:(DE-Juel1)ER-C-2-20170209$$kER-C-2$$lMaterialwissenschaft u. Werkstofftechnik$$x1
001021033 980__ $$aconf
001021033 980__ $$aVDB
001021033 980__ $$aI:(DE-Juel1)IEK-9-20110218
001021033 980__ $$aI:(DE-Juel1)ER-C-2-20170209
001021033 980__ $$aUNRESTRICTED
001021033 981__ $$aI:(DE-Juel1)IET-1-20110218