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001025077 005__ 20250203103421.0
001025077 0247_ $$2doi$$a10.1149/MA2023-012487mtgabs
001025077 0247_ $$2ISSN$$a1091-8213
001025077 0247_ $$2ISSN$$a2151-2043
001025077 037__ $$aFZJ-2024-02665
001025077 082__ $$a540
001025077 1001_ $$aLuether, Marco J.$$b0
001025077 245__ $$aIs the ‘Single-Crystal’ Approach Truly Feasible for Ni-Rich Layered Oxides? – a Fair and Realistic Performance Comparison in Ncm||Graphite Coin Cells
001025077 260__ $$aPennington, NJ$$bSoc.$$c2023
001025077 3367_ $$2DRIVER$$aarticle
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001025077 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1712836478_17869
001025077 3367_ $$2BibTeX$$aARTICLE
001025077 3367_ $$2ORCID$$aJOURNAL_ARTICLE
001025077 3367_ $$00$$2EndNote$$aJournal Article
001025077 500__ $$aHierbei handelt es sich lediglich um einen Abstract.
001025077 520__ $$aSecondary particle cracking induced by anisotropic volume change during cycling has been identified as a major failure mechanism of state-of-the-art Ni-rich layered oxide cathodes like Li[NixCoyMnz]O2 (x + y + z = 1, NCMxyz where x ≥ 0.8) as it allows surface-related degradation phenomena such as inactive phase formation, transition metal dissolution and ongoing electrolyte decomposition to continue on newly formed, highly reactive surface cycle after cycle.1 The approach of designing 'single-crystal' (SC) particles is believed to mitigate this issue by replacing polycrystalline secondary agglomerates (PC) by well-separated micron-sized primary particles that can prolong the cycle life of the material by improving its morphological integrity.2Particle cracking in layered oxide cathode materials is exacerbated with increasing Ni-content which qualifies the 'single-crystal' approach especially for Ni-rich NCMs (x ≥ 0.8). Despite this, meaningful long-term cycling studies are still scarce as two main challenges obstruct a fair evaluation of the 'single-crystal' approach:    The synthesis of Ni-rich SC-NCMs is not straightforward as the conditions required for enhanced crystal growth (e. higher calcination temperature and/or a molten-salt environment requiring a washing step) are inherently damaging to Ni-rich materials.3 This often leads to comparisons between materials where factors other than morphology cannot be excluded (e.g. synthesis from different precursors, different post-processing steps, undisclosed dopants/coatings in commercial materials, etc.).    The larger crystal size of SC-NCMs compared to PC-NCMs is believed to cause kinetic limitations impacting achievable capacities and rate performance.4 As a consequence, either the 'single-crystal' sample is cycled in a lower state-of-charge window despite the same same upper cut-off voltage or the polycrystalline reference sample is cycled at an unnecessarily high voltage. Both conditions favor the 'single-crystal' material.The objective of this work was to establish a fair comparison between the two morphologies. For this purpose, a series of 'single-crystal' Li[Ni0.8Co0.1Mn0.1]O2 (SC-NCM811) materials with varying particle sizes where synthesized. To deconvolute the effect of particle size and morphology from other influences, a molten salt-assisted synthesis was followed, so that bulk properties of SC-NCMs remained constant and PC-NCM reference samples could be synthesized from the same home-made precursors and with the same post-processing steps. The samples were thoroughly characterized in terms of physicochemical properties and their electrochemical performance was evaluated in NCM||Li and NCM||Graphite coin cells. The performance of PC- and SC-NCM811 was compared at the same upper cutoff voltage and again at the same state-of-charge window to compare the materials as fairly as possible.References:(1) de Biasi, L.; Schwarz, B.; Brezesinski, T.; Hartmann, P.; Janek, J.; Ehrenberg, H. Chemical, Structural, and Electronic Aspects of Formation and Degradation Behavior on Different Length Scales of Ni-Rich NCM and Li-Rich HE-NCM Cathode Materials in Li-Ion Batteries. Advanced Materials2019, 31 (26). https://doi.org/10.1002/adma.201900985.(2) Zhao, W.; Zou, L.; Zhang, L.; Fan, X.; Zhang, H.; Pagani, F.; Brack, E.; Seidl, L.; Ou, X.; Egorov, K.; Guo, X.; Hu, G.; Trabesinger, S.; Wang, C.; Battaglia, C. Assessing Long‐Term Cycling Stability of Single‐Crystal Versus Polycrystalline Nickel‐Rich NCM in Pouch Cells with 6 MAh Cm −2 Electrodes. Small2022, 2107357, 2107357. https://doi.org/10.1002/smll.202107357.(3) Langdon, J.; Manthiram, A. A Perspective on Single-Crystal Layered Oxide Cathodes for Lithium-Ion Batteries. Energy Storage Mater2021, 37, 143–160. https://doi.org/10.1016/j.ensm.2021.02.003.(4) Ryu, H. H.; Namkoong, B.; Kim, J. H.; Belharouak, I.; Yoon, C. S.; Sun, Y. K. Capacity Fading Mechanisms in Ni-Rich Single-Crystal NCM Cathodes. ACS Energy Lett2021, 6 (8), 2726–2734. https://doi.org/10.1021/acsenergylett.1c01089.
001025077 536__ $$0G:(DE-HGF)POF4-1221$$a1221 - Fundamentals and Materials (POF4-122)$$cPOF4-122$$fPOF IV$$x0
001025077 588__ $$aDataset connected to CrossRef, Journals: juser.fz-juelich.de
001025077 7001_ $$aGomez-Martin, Aurora$$b1
001025077 7001_ $$0P:(DE-HGF)0$$aJiang, Shi-Kai$$b2
001025077 7001_ $$0P:(DE-HGF)0$$aSchmuch, Richard$$b3
001025077 7001_ $$0P:(DE-HGF)0$$aPlacke, Tobias$$b4
001025077 7001_ $$aHwang, Bing-Joe$$b5
001025077 7001_ $$0P:(DE-Juel1)166130$$aWinter, Martin$$b6
001025077 773__ $$0PERI:(DE-600)2438749-6$$a10.1149/MA2023-012487mtgabs$$gVol. MA2023-01, no. 2, p. 487 - 487$$n2$$p487 - 487$$tMeeting abstracts$$vMA2023-01$$x1091-8213$$y2023
001025077 909CO $$ooai:juser.fz-juelich.de:1025077$$pVDB
001025077 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)166130$$aForschungszentrum Jülich$$b6$$kFZJ
001025077 9131_ $$0G:(DE-HGF)POF4-122$$1G:(DE-HGF)POF4-120$$2G:(DE-HGF)POF4-100$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-1221$$aDE-HGF$$bForschungsbereich Energie$$lMaterialien und Technologien für die Energiewende (MTET)$$vElektrochemische Energiespeicherung$$x0
001025077 9141_ $$y2024
001025077 9201_ $$0I:(DE-Juel1)IEK-12-20141217$$kIEK-12$$lHelmholtz-Institut Münster Ionenleiter für Energiespeicher$$x0
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001025077 981__ $$aI:(DE-Juel1)IMD-4-20141217