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Effects of cycling on lithium-ion battery hysteresis and overvoltage

Currently, lithium-ion batteries are widely used as energy storage systems for mobile applications. However, a better understanding of their nature is still required to improve battery management systems (BMS). Overvoltages and open-circuit voltage (OCV) hysteresis provide valuable information regar...

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Autores principales: Ovejas, V. J., Cuadras, A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795866/
https://www.ncbi.nlm.nih.gov/pubmed/31619725
http://dx.doi.org/10.1038/s41598-019-51474-5
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author Ovejas, V. J.
Cuadras, A.
author_facet Ovejas, V. J.
Cuadras, A.
author_sort Ovejas, V. J.
collection PubMed
description Currently, lithium-ion batteries are widely used as energy storage systems for mobile applications. However, a better understanding of their nature is still required to improve battery management systems (BMS). Overvoltages and open-circuit voltage (OCV) hysteresis provide valuable information regarding battery performance, but estimations of these parameters are generally inaccurate, leading to errors in BMS. Studies on hysteresis are commonly avoided because the hysteresis depends on the state of charge and degradation level and requires time-consuming measurements. We have investigated hysteresis and overvoltages in Li(NiMnCo)O(2)/graphite and LiFePO(4)/graphite commercial cells. Here we report a direct relationship between an increase in OCV hysteresis and an increase in charge overvoltage when the cells are degraded by cycling. We find that the hysteresis is related to diffusion and increases with the formation of pure phases, being primarily related to the graphite electrode. These findings indicate that the graphite electrode is a determining factor for cell efficiency.
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spelling pubmed-67958662019-10-25 Effects of cycling on lithium-ion battery hysteresis and overvoltage Ovejas, V. J. Cuadras, A. Sci Rep Article Currently, lithium-ion batteries are widely used as energy storage systems for mobile applications. However, a better understanding of their nature is still required to improve battery management systems (BMS). Overvoltages and open-circuit voltage (OCV) hysteresis provide valuable information regarding battery performance, but estimations of these parameters are generally inaccurate, leading to errors in BMS. Studies on hysteresis are commonly avoided because the hysteresis depends on the state of charge and degradation level and requires time-consuming measurements. We have investigated hysteresis and overvoltages in Li(NiMnCo)O(2)/graphite and LiFePO(4)/graphite commercial cells. Here we report a direct relationship between an increase in OCV hysteresis and an increase in charge overvoltage when the cells are degraded by cycling. We find that the hysteresis is related to diffusion and increases with the formation of pure phases, being primarily related to the graphite electrode. These findings indicate that the graphite electrode is a determining factor for cell efficiency. Nature Publishing Group UK 2019-10-16 /pmc/articles/PMC6795866/ /pubmed/31619725 http://dx.doi.org/10.1038/s41598-019-51474-5 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Ovejas, V. J.
Cuadras, A.
Effects of cycling on lithium-ion battery hysteresis and overvoltage
title Effects of cycling on lithium-ion battery hysteresis and overvoltage
title_full Effects of cycling on lithium-ion battery hysteresis and overvoltage
title_fullStr Effects of cycling on lithium-ion battery hysteresis and overvoltage
title_full_unstemmed Effects of cycling on lithium-ion battery hysteresis and overvoltage
title_short Effects of cycling on lithium-ion battery hysteresis and overvoltage
title_sort effects of cycling on lithium-ion battery hysteresis and overvoltage
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795866/
https://www.ncbi.nlm.nih.gov/pubmed/31619725
http://dx.doi.org/10.1038/s41598-019-51474-5
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