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Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging

Gas generation as a result of electrolyte decomposition is one of the major issues of high-performance rechargeable batteries. Here, we report the direct observation of gassing in operating lithium-ion batteries using neutron imaging. This technique can be used to obtain qualitative as well as quant...

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Autores principales: Michalak, Barbara, Sommer, Heino, Mannes, David, Kaestner, Anders, Brezesinski, Torsten, Janek, Jürgen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4620486/
https://www.ncbi.nlm.nih.gov/pubmed/26496823
http://dx.doi.org/10.1038/srep15627
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author Michalak, Barbara
Sommer, Heino
Mannes, David
Kaestner, Anders
Brezesinski, Torsten
Janek, Jürgen
author_facet Michalak, Barbara
Sommer, Heino
Mannes, David
Kaestner, Anders
Brezesinski, Torsten
Janek, Jürgen
author_sort Michalak, Barbara
collection PubMed
description Gas generation as a result of electrolyte decomposition is one of the major issues of high-performance rechargeable batteries. Here, we report the direct observation of gassing in operating lithium-ion batteries using neutron imaging. This technique can be used to obtain qualitative as well as quantitative information by applying a new analysis approach. Special emphasis is placed on high voltage LiNi(0.5)Mn(1.5)O(4)/graphite pouch cells. Continuous gassing due to oxidation and reduction of electrolyte solvents is observed. To separate gas evolution reactions occurring on the anode from those associated with the cathode interface and to gain more insight into the gassing behavior of LiNi(0.5)Mn(1.5)O(4)/graphite cells, neutron experiments were also conducted systematically on other cathode/anode combinations, including LiFePO(4)/graphite, LiNi(0.5)Mn(1.5)O(4)/Li(4)Ti(5)O(12) and LiFePO(4)/Li(4)Ti(5)O(12). In addition, the data were supported by gas pressure measurements. The results suggest that metal dissolution in the electrolyte and decomposition products resulting from the high potentials adversely affect the gas generation, particularly in the first charge cycle (i.e., during graphite solid-electrolyte interface layer formation).
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spelling pubmed-46204862015-10-29 Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging Michalak, Barbara Sommer, Heino Mannes, David Kaestner, Anders Brezesinski, Torsten Janek, Jürgen Sci Rep Article Gas generation as a result of electrolyte decomposition is one of the major issues of high-performance rechargeable batteries. Here, we report the direct observation of gassing in operating lithium-ion batteries using neutron imaging. This technique can be used to obtain qualitative as well as quantitative information by applying a new analysis approach. Special emphasis is placed on high voltage LiNi(0.5)Mn(1.5)O(4)/graphite pouch cells. Continuous gassing due to oxidation and reduction of electrolyte solvents is observed. To separate gas evolution reactions occurring on the anode from those associated with the cathode interface and to gain more insight into the gassing behavior of LiNi(0.5)Mn(1.5)O(4)/graphite cells, neutron experiments were also conducted systematically on other cathode/anode combinations, including LiFePO(4)/graphite, LiNi(0.5)Mn(1.5)O(4)/Li(4)Ti(5)O(12) and LiFePO(4)/Li(4)Ti(5)O(12). In addition, the data were supported by gas pressure measurements. The results suggest that metal dissolution in the electrolyte and decomposition products resulting from the high potentials adversely affect the gas generation, particularly in the first charge cycle (i.e., during graphite solid-electrolyte interface layer formation). Nature Publishing Group 2015-10-26 /pmc/articles/PMC4620486/ /pubmed/26496823 http://dx.doi.org/10.1038/srep15627 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Michalak, Barbara
Sommer, Heino
Mannes, David
Kaestner, Anders
Brezesinski, Torsten
Janek, Jürgen
Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging
title Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging
title_full Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging
title_fullStr Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging
title_full_unstemmed Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging
title_short Gas Evolution in Operating Lithium-Ion Batteries Studied In Situ by Neutron Imaging
title_sort gas evolution in operating lithium-ion batteries studied in situ by neutron imaging
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4620486/
https://www.ncbi.nlm.nih.gov/pubmed/26496823
http://dx.doi.org/10.1038/srep15627
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