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Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation
Fast charging (<15 min) of lithium‐ion batteries (LIBs) for electrical vehicles (EVs) is widely seen as the key factor that will greatly stimulate the EV markets, and its realization is mainly hindered by the sluggish diffusion of Li(+). To have a mechanistic understanding of Li(+) diffusion with...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8564430/ https://www.ncbi.nlm.nih.gov/pubmed/34494394 http://dx.doi.org/10.1002/advs.202102318 |
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author | Wu, Xianyang Song, Bohang Chien, Po‐Hsiu Everett, S. Michelle Zhao, Kejie Liu, Jue Du, Zhijia |
author_facet | Wu, Xianyang Song, Bohang Chien, Po‐Hsiu Everett, S. Michelle Zhao, Kejie Liu, Jue Du, Zhijia |
author_sort | Wu, Xianyang |
collection | PubMed |
description | Fast charging (<15 min) of lithium‐ion batteries (LIBs) for electrical vehicles (EVs) is widely seen as the key factor that will greatly stimulate the EV markets, and its realization is mainly hindered by the sluggish diffusion of Li(+). To have a mechanistic understanding of Li(+) diffusion within LIBs, in this study, structural evolutions of electrodes for a Ni‐rich LiNi(0.6)Mn(0.2)Co(0.2)O(2) (NMC622) || graphite cylindrical cell with high areal loading (2.78 mAh cm(−2)) are developed for operando neutron powder diffraction study at different charging rates. Via sequential Rietveld refinements, changes in structures of NMC622 and Li (x) C(6) are obtained during moderate and fast charging (from 0.27 C to 4.4 C). NMC622 exhibits the same structural evolution regardless of C‐rates. For phase transitions of Li (x) C(6), the stage I (LiC(6)) phase emerges earlier during the stepwise intercalation at a lower state of charge when charging rate is increased. It is also found that the stage II (LiC(12)) → stage I (LiC(6)) transition is the rate‐limiting step during fast charging. The LiC(12) → LiC(6) transition mechanism is further analyzed using the Johnson–Mehl–Avrami–Kolmogorov model. It is concluded as a diffusion‐controlled, 1D phase transition with decreasing nucleation kinetics under increasing chargingrates. |
format | Online Article Text |
id | pubmed-8564430 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-85644302021-11-09 Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation Wu, Xianyang Song, Bohang Chien, Po‐Hsiu Everett, S. Michelle Zhao, Kejie Liu, Jue Du, Zhijia Adv Sci (Weinh) Research Articles Fast charging (<15 min) of lithium‐ion batteries (LIBs) for electrical vehicles (EVs) is widely seen as the key factor that will greatly stimulate the EV markets, and its realization is mainly hindered by the sluggish diffusion of Li(+). To have a mechanistic understanding of Li(+) diffusion within LIBs, in this study, structural evolutions of electrodes for a Ni‐rich LiNi(0.6)Mn(0.2)Co(0.2)O(2) (NMC622) || graphite cylindrical cell with high areal loading (2.78 mAh cm(−2)) are developed for operando neutron powder diffraction study at different charging rates. Via sequential Rietveld refinements, changes in structures of NMC622 and Li (x) C(6) are obtained during moderate and fast charging (from 0.27 C to 4.4 C). NMC622 exhibits the same structural evolution regardless of C‐rates. For phase transitions of Li (x) C(6), the stage I (LiC(6)) phase emerges earlier during the stepwise intercalation at a lower state of charge when charging rate is increased. It is also found that the stage II (LiC(12)) → stage I (LiC(6)) transition is the rate‐limiting step during fast charging. The LiC(12) → LiC(6) transition mechanism is further analyzed using the Johnson–Mehl–Avrami–Kolmogorov model. It is concluded as a diffusion‐controlled, 1D phase transition with decreasing nucleation kinetics under increasing chargingrates. John Wiley and Sons Inc. 2021-09-08 /pmc/articles/PMC8564430/ /pubmed/34494394 http://dx.doi.org/10.1002/advs.202102318 Text en © 2021 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Wu, Xianyang Song, Bohang Chien, Po‐Hsiu Everett, S. Michelle Zhao, Kejie Liu, Jue Du, Zhijia Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation |
title | Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation |
title_full | Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation |
title_fullStr | Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation |
title_full_unstemmed | Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation |
title_short | Structural Evolution and Transition Dynamics in Lithium Ion Battery under Fast Charging: An Operando Neutron Diffraction Investigation |
title_sort | structural evolution and transition dynamics in lithium ion battery under fast charging: an operando neutron diffraction investigation |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8564430/ https://www.ncbi.nlm.nih.gov/pubmed/34494394 http://dx.doi.org/10.1002/advs.202102318 |
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