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Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance

Li(1.5)Al(0.5)Ge(1.5)(PO(4))(3) (LAGP) is an inorganic solid electrolyte with a Na superionic conductor (NASICON) structure that provides a channel for lithium ion transport. We coated LAGP particles on one side of a polypropylene (PP) separator film to improve the ionic conductivity of the separato...

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Autores principales: Liang, Tian, Cao, Jian-Hua, Liang, Wei-Hua, Li, Quan, He, Lei, Wu, Da-Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9076374/
https://www.ncbi.nlm.nih.gov/pubmed/35540032
http://dx.doi.org/10.1039/c9ra09200e
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author Liang, Tian
Cao, Jian-Hua
Liang, Wei-Hua
Li, Quan
He, Lei
Wu, Da-Yong
author_facet Liang, Tian
Cao, Jian-Hua
Liang, Wei-Hua
Li, Quan
He, Lei
Wu, Da-Yong
author_sort Liang, Tian
collection PubMed
description Li(1.5)Al(0.5)Ge(1.5)(PO(4))(3) (LAGP) is an inorganic solid electrolyte with a Na superionic conductor (NASICON) structure that provides a channel for lithium ion transport. We coated LAGP particles on one side of a polypropylene (PP) separator film to improve the ionic conductivity of the separator, and water-dispersed polyvinylidene fluoride–hexafluoropropylene (PVDF–HFP) on the other side to reduce the interfacial resistance between the separator and the lithium metal anode. The results show that the LAGP/PP/PVDF–HFP separator has a high ionic conductivity (1.06 mS cm(−1)) at room temperature (PP separator: 0.70 mS cm(−1)), and an electrochemical window of 5.2 V (vs. Li(+)/Li). The capacity retention of a NCM|LAGP/PP/PVDF–HFP|graphite full cell is 81.0% after 300 charge–discharge cycles at 0.2C. When used in a NCM|LAGP/PP/PVDF–HFP|Li half-cell system, the initial discharge capacity is 172.5 mA h g(−1) at 0.2C, and the capacity retention is 83.2% after 300 cycles. More significantly, the surface of the Li anode is smooth and flat after 200 cycles. The interface resistance increased from 7 to 109 Ω after 100 cycles at 0.2C. This indicates that the synergistic effect of the asymmetric coated LAGP and PVDF–HFP is beneficial to inhibiting the growth of lithium dendrites in the battery and reduces the interface resistance.
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spelling pubmed-90763742022-05-09 Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance Liang, Tian Cao, Jian-Hua Liang, Wei-Hua Li, Quan He, Lei Wu, Da-Yong RSC Adv Chemistry Li(1.5)Al(0.5)Ge(1.5)(PO(4))(3) (LAGP) is an inorganic solid electrolyte with a Na superionic conductor (NASICON) structure that provides a channel for lithium ion transport. We coated LAGP particles on one side of a polypropylene (PP) separator film to improve the ionic conductivity of the separator, and water-dispersed polyvinylidene fluoride–hexafluoropropylene (PVDF–HFP) on the other side to reduce the interfacial resistance between the separator and the lithium metal anode. The results show that the LAGP/PP/PVDF–HFP separator has a high ionic conductivity (1.06 mS cm(−1)) at room temperature (PP separator: 0.70 mS cm(−1)), and an electrochemical window of 5.2 V (vs. Li(+)/Li). The capacity retention of a NCM|LAGP/PP/PVDF–HFP|graphite full cell is 81.0% after 300 charge–discharge cycles at 0.2C. When used in a NCM|LAGP/PP/PVDF–HFP|Li half-cell system, the initial discharge capacity is 172.5 mA h g(−1) at 0.2C, and the capacity retention is 83.2% after 300 cycles. More significantly, the surface of the Li anode is smooth and flat after 200 cycles. The interface resistance increased from 7 to 109 Ω after 100 cycles at 0.2C. This indicates that the synergistic effect of the asymmetric coated LAGP and PVDF–HFP is beneficial to inhibiting the growth of lithium dendrites in the battery and reduces the interface resistance. The Royal Society of Chemistry 2019-12-12 /pmc/articles/PMC9076374/ /pubmed/35540032 http://dx.doi.org/10.1039/c9ra09200e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Liang, Tian
Cao, Jian-Hua
Liang, Wei-Hua
Li, Quan
He, Lei
Wu, Da-Yong
Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance
title Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance
title_full Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance
title_fullStr Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance
title_full_unstemmed Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance
title_short Asymmetrically coated LAGP/PP/PVDF–HFP composite separator film and its effect on the improvement of NCM battery performance
title_sort asymmetrically coated lagp/pp/pvdf–hfp composite separator film and its effect on the improvement of ncm battery performance
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9076374/
https://www.ncbi.nlm.nih.gov/pubmed/35540032
http://dx.doi.org/10.1039/c9ra09200e
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