Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries

Abstract The abnormal lattice expansion of commercial polypropylene (PP)/polyethylene (PE)/polypropylene (PP) separator in lithium-ion battery under different charging current densities was observed by in-situ X-ray diffraction. Significant lattice changes of both PP and PE were found during the low...

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Autores principales:	Wen-Dung Hsu, Po-Wei Yang, Hung-Yuan Chen, Po-Hsien Wu, Pin-Chin Wu, Chih-Wei Hu, Lakshmanan Saravanan, Yen-Fa Liao, Yen-Teng Su, Dinesh Bhalothia, Tsan-Yao Chen, Chia-Chin Chang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/900d538f01c6445e875235c4924232b6
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spelling	oai:doaj.org-article:900d538f01c6445e875235c4924232b62021-12-02T13:57:05ZPreferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries10.1038/s41598-021-81644-32045-2322https://doaj.org/article/900d538f01c6445e875235c4924232b62021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81644-3https://doaj.org/toc/2045-2322Abstract The abnormal lattice expansion of commercial polypropylene (PP)/polyethylene (PE)/polypropylene (PP) separator in lithium-ion battery under different charging current densities was observed by in-situ X-ray diffraction. Significant lattice changes of both PP and PE were found during the low current density charging. The capacity fading and the resistance value of the cell measured at 0.025 C (5th retention, 92%) is unexpectedly larger than that at 1.0 C (5th retention, 97.3%) from the electrochemical impedance spectroscopic data. High-resolution scanning electron microscopy is employed to witness the pore changes of the trilayered membrane. Density functional theory calculations were used to investigate the mechanism responsible for the irregular results. The calculations revealed that the insertion of Li-ion and EC molecule into PP or PE are thermodynamically favourable process which might explain the anomalous significant lattice expansion during the low current density charging. Therefore, designing a new separator material with a more compact crystalline structure or surface modification to reduce the Li insertion during the battery operation is desirable.Wen-Dung HsuPo-Wei YangHung-Yuan ChenPo-Hsien WuPin-Chin WuChih-Wei HuLakshmanan SaravananYen-Fa LiaoYen-Teng SuDinesh BhalothiaTsan-Yao ChenChia-Chin ChangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Wen-Dung Hsu Po-Wei Yang Hung-Yuan Chen Po-Hsien Wu Pin-Chin Wu Chih-Wei Hu Lakshmanan Saravanan Yen-Fa Liao Yen-Teng Su Dinesh Bhalothia Tsan-Yao Chen Chia-Chin Chang Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries
description	Abstract The abnormal lattice expansion of commercial polypropylene (PP)/polyethylene (PE)/polypropylene (PP) separator in lithium-ion battery under different charging current densities was observed by in-situ X-ray diffraction. Significant lattice changes of both PP and PE were found during the low current density charging. The capacity fading and the resistance value of the cell measured at 0.025 C (5th retention, 92%) is unexpectedly larger than that at 1.0 C (5th retention, 97.3%) from the electrochemical impedance spectroscopic data. High-resolution scanning electron microscopy is employed to witness the pore changes of the trilayered membrane. Density functional theory calculations were used to investigate the mechanism responsible for the irregular results. The calculations revealed that the insertion of Li-ion and EC molecule into PP or PE are thermodynamically favourable process which might explain the anomalous significant lattice expansion during the low current density charging. Therefore, designing a new separator material with a more compact crystalline structure or surface modification to reduce the Li insertion during the battery operation is desirable.
format	article
author	Wen-Dung Hsu Po-Wei Yang Hung-Yuan Chen Po-Hsien Wu Pin-Chin Wu Chih-Wei Hu Lakshmanan Saravanan Yen-Fa Liao Yen-Teng Su Dinesh Bhalothia Tsan-Yao Chen Chia-Chin Chang
author_facet	Wen-Dung Hsu Po-Wei Yang Hung-Yuan Chen Po-Hsien Wu Pin-Chin Wu Chih-Wei Hu Lakshmanan Saravanan Yen-Fa Liao Yen-Teng Su Dinesh Bhalothia Tsan-Yao Chen Chia-Chin Chang
author_sort	Wen-Dung Hsu
title	Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries
title_short	Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries
title_full	Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries
title_fullStr	Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries
title_full_unstemmed	Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries
title_sort	preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in li-ion batteries
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/900d538f01c6445e875235c4924232b6
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Preferential lattice expansion of polypropylene in a trilayer polypropylene/polyethylene/polypropylene microporous separator in Li-ion batteries

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