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Synergistic Degradation Mechanism in Single Crystal Ni-Rich NMC//Graphite Cells
dc.contributor.author | Paez Fajardo, Galo | |
dc.contributor.author | Temprano, Israel | |
dc.contributor.author | Piper, Louis | |
dc.date.accessioned | 2024-08-21T08:37:24Z | |
dc.date.available | 2024-08-21T08:37:24Z | |
dc.date.issued | 2023-11-06 | |
dc.identifier.citation | ACS Energy Lett. 2023, 8, 5025−5031 | es_ES |
dc.identifier.issn | 2380-8195 | |
dc.identifier.uri | http://hdl.handle.net/2183/38635 | |
dc.description.abstract | [Abstract]: Oxygen loss at high voltages in Ni-rich NMC//graphite Li-ion batteries promotes degradation, but increasing evidence from full cells reveals that the depth of discharge choice can further accelerate aging, i.e., synergistic degradation. In this Letter, we employ cycling protocols to examine the origin of the synergistic degradation for single crystal Ni-rich NMC//graphite pouch cells. In regimes where oxygen loss is not promoted (V < 4.3 V), a lower cutoff voltage does not affect capacity retention (after 100 cycles), despite significant graphite expansion occurring. In contrast, when NMC surface oxygen loss is induced (V > 4.3 V), deeper depth of discharge leads to pronounced faster aging. Using a combination of post-mortem analysis and density functional theory, we present a mechanistic description of surface phase densification and evolution as a function of voltage and cycling. The detrimental impact of this mechanism on lithium-ion kinetics is used to explain the observed cycling results. | es_ES |
dc.description.sponsorship | We acknowledge Diamond Light Source for time on beamline I09 under Proposals SI30201-1 and SI30201-2. This work is supported by the Faraday Institution under Grants FIRG044, FIRG024, and FIRG060. | es_ES |
dc.description.sponsorship | Diamond Light Source; SI30201-1 | es_ES |
dc.description.sponsorship | Diamond Light Source; SI30201-2 | es_ES |
dc.description.sponsorship | Faraday Institution; FIRG044 | es_ES |
dc.description.sponsorship | Faraday Institution; FIRG024 | es_ES |
dc.description.sponsorship | Faraday Institution; FIRG060 | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Chemical Society | es_ES |
dc.relation.uri | https://doi.org/10.1021/acsenergylett.3c01596 | es_ES |
dc.rights | Copyright © 2023 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/). | es_ES |
dc.subject | Degradation | es_ES |
dc.subject | Electrochemical cells | es_ES |
dc.subject | Electrodes | es_ES |
dc.subject | Oxides | es_ES |
dc.subject | Toxicological synergy | es_ES |
dc.title | Synergistic Degradation Mechanism in Single Crystal Ni-Rich NMC//Graphite Cells | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.rights.access | info:eu-repo/semantics/openAccess | es_ES |
UDC.journalTitle | ACS Energy Letters | es_ES |
UDC.volume | 8 | es_ES |
UDC.issue | 12 | es_ES |
UDC.startPage | 5025 | es_ES |
UDC.endPage | 5031 | es_ES |
dc.identifier.doi | 10.1021/acsenergylett.3c01596 |
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