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Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study
The addition of Si compounds to graphite anodes has become an attractive way of increasing the practical specific energies in Li‐ion cells. Previous studies involving Si/C anodes lacked direct insight into the processes occurring in full cells during low‐temperature operation. In this study, a power...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7028078/ https://www.ncbi.nlm.nih.gov/pubmed/31738480 http://dx.doi.org/10.1002/cssc.201903139 |
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author | Richter, Karsten Waldmann, Thomas Paul, Neelima Jobst, Nicola Scurtu, Rares‐George Hofmann, Michael Gilles, Ralph Wohlfahrt‐Mehrens, Margret |
author_facet | Richter, Karsten Waldmann, Thomas Paul, Neelima Jobst, Nicola Scurtu, Rares‐George Hofmann, Michael Gilles, Ralph Wohlfahrt‐Mehrens, Margret |
author_sort | Richter, Karsten |
collection | PubMed |
description | The addition of Si compounds to graphite anodes has become an attractive way of increasing the practical specific energies in Li‐ion cells. Previous studies involving Si/C anodes lacked direct insight into the processes occurring in full cells during low‐temperature operation. In this study, a powerful combination of operando neutron diffraction, electrochemical tests, and post‐mortem analysis is used for the investigation of Li‐ion cells. 18650‐type cylindrical cells in two different aging states are investigated by operando neutron diffraction. The experiments reveal deep insights and important trends in low‐temperature charging mechanisms involving intercalation, alloying, Li metal deposition, and relaxation processes as a function of charging C‐rates and temperatures. Additionally, the main aging mechanism caused by long‐term cycling and interesting synergistic effects of Si and graphite are elucidated. |
format | Online Article Text |
id | pubmed-7028078 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-70280782020-02-25 Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study Richter, Karsten Waldmann, Thomas Paul, Neelima Jobst, Nicola Scurtu, Rares‐George Hofmann, Michael Gilles, Ralph Wohlfahrt‐Mehrens, Margret ChemSusChem Full Papers The addition of Si compounds to graphite anodes has become an attractive way of increasing the practical specific energies in Li‐ion cells. Previous studies involving Si/C anodes lacked direct insight into the processes occurring in full cells during low‐temperature operation. In this study, a powerful combination of operando neutron diffraction, electrochemical tests, and post‐mortem analysis is used for the investigation of Li‐ion cells. 18650‐type cylindrical cells in two different aging states are investigated by operando neutron diffraction. The experiments reveal deep insights and important trends in low‐temperature charging mechanisms involving intercalation, alloying, Li metal deposition, and relaxation processes as a function of charging C‐rates and temperatures. Additionally, the main aging mechanism caused by long‐term cycling and interesting synergistic effects of Si and graphite are elucidated. John Wiley and Sons Inc. 2019-12-27 2020-02-07 /pmc/articles/PMC7028078/ /pubmed/31738480 http://dx.doi.org/10.1002/cssc.201903139 Text en © 2019 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Full Papers Richter, Karsten Waldmann, Thomas Paul, Neelima Jobst, Nicola Scurtu, Rares‐George Hofmann, Michael Gilles, Ralph Wohlfahrt‐Mehrens, Margret Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study |
title | Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study |
title_full | Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study |
title_fullStr | Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study |
title_full_unstemmed | Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study |
title_short | Low‐Temperature Charging and Aging Mechanisms of Si/C Composite Anodes in Li‐Ion Batteries: An Operando Neutron Scattering Study |
title_sort | low‐temperature charging and aging mechanisms of si/c composite anodes in li‐ion batteries: an operando neutron scattering study |
topic | Full Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7028078/ https://www.ncbi.nlm.nih.gov/pubmed/31738480 http://dx.doi.org/10.1002/cssc.201903139 |
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