Cargando…

Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries

[Image: see text] In this work, electrospun PBI separators with a highly porous structure and nanofiber diameter of about 90–150 nm are prepared using a multi-nozzle under controlled conditions for lithium metal batteries. Cross-linking with α, α-dibromo-p-xylene and surface treatment using 4-(chlor...

Descripción completa

Detalles Bibliográficos
Autores principales: Jung, Ji Hye, Vijayakumar, Vijayalekshmi, Haridas, Anupriya K., Ahn, Jou-Hyeon, Nam, Sang Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9798493/
https://www.ncbi.nlm.nih.gov/pubmed/36591163
http://dx.doi.org/10.1021/acsomega.2c05472
_version_ 1784860915859980288
author Jung, Ji Hye
Vijayakumar, Vijayalekshmi
Haridas, Anupriya K.
Ahn, Jou-Hyeon
Nam, Sang Yong
author_facet Jung, Ji Hye
Vijayakumar, Vijayalekshmi
Haridas, Anupriya K.
Ahn, Jou-Hyeon
Nam, Sang Yong
author_sort Jung, Ji Hye
collection PubMed
description [Image: see text] In this work, electrospun PBI separators with a highly porous structure and nanofiber diameter of about 90–150 nm are prepared using a multi-nozzle under controlled conditions for lithium metal batteries. Cross-linking with α, α-dibromo-p-xylene and surface treatment using 4-(chloromethyl) benzoic acid successfully improve the electrochemical as well as mechanical properties of the separators. The resulting separator is endowed with high thermal stability and excellent wettability (1080 to 1150%) with commercial liquid electrolyte than PE and PP (Celgard 2400) separators. Besides, attractive cycling stability and rate capability in LiFePO(4)/Li cells are attained with the modified separators. Prominently, CROSSLINK PBI exhibits a stable Coulombic efficiency of more than 99% over 100 charge–discharge cycles at 0.5 C, which is superior to the value of cells using commercial PE and PP (Celgard 2400) separators. The half cells assembled using the CROSSLINK PBI separator can deliver a discharge capacity of 150.3 mAh g(–1) at 0.2 C after 50 cycles corresponding to 88.4% of the theoretical value of LiFePO(4) (170 mAh g(–1)). This work offers a worthwhile method to produce thermally stable separators with noteworthy electrochemical performances which opens new possibilities to improve the safe operation of batteries.
format Online
Article
Text
id pubmed-9798493
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher American Chemical Society
record_format MEDLINE/PubMed
spelling pubmed-97984932022-12-30 Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries Jung, Ji Hye Vijayakumar, Vijayalekshmi Haridas, Anupriya K. Ahn, Jou-Hyeon Nam, Sang Yong ACS Omega [Image: see text] In this work, electrospun PBI separators with a highly porous structure and nanofiber diameter of about 90–150 nm are prepared using a multi-nozzle under controlled conditions for lithium metal batteries. Cross-linking with α, α-dibromo-p-xylene and surface treatment using 4-(chloromethyl) benzoic acid successfully improve the electrochemical as well as mechanical properties of the separators. The resulting separator is endowed with high thermal stability and excellent wettability (1080 to 1150%) with commercial liquid electrolyte than PE and PP (Celgard 2400) separators. Besides, attractive cycling stability and rate capability in LiFePO(4)/Li cells are attained with the modified separators. Prominently, CROSSLINK PBI exhibits a stable Coulombic efficiency of more than 99% over 100 charge–discharge cycles at 0.5 C, which is superior to the value of cells using commercial PE and PP (Celgard 2400) separators. The half cells assembled using the CROSSLINK PBI separator can deliver a discharge capacity of 150.3 mAh g(–1) at 0.2 C after 50 cycles corresponding to 88.4% of the theoretical value of LiFePO(4) (170 mAh g(–1)). This work offers a worthwhile method to produce thermally stable separators with noteworthy electrochemical performances which opens new possibilities to improve the safe operation of batteries. American Chemical Society 2022-12-14 /pmc/articles/PMC9798493/ /pubmed/36591163 http://dx.doi.org/10.1021/acsomega.2c05472 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Jung, Ji Hye
Vijayakumar, Vijayalekshmi
Haridas, Anupriya K.
Ahn, Jou-Hyeon
Nam, Sang Yong
Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries
title Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries
title_full Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries
title_fullStr Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries
title_full_unstemmed Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries
title_short Effect of Cross-Linking and Surface Treatment on the Functional Properties of Electrospun Polybenzimidazole Separators for Lithium Metal Batteries
title_sort effect of cross-linking and surface treatment on the functional properties of electrospun polybenzimidazole separators for lithium metal batteries
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9798493/
https://www.ncbi.nlm.nih.gov/pubmed/36591163
http://dx.doi.org/10.1021/acsomega.2c05472
work_keys_str_mv AT jungjihye effectofcrosslinkingandsurfacetreatmentonthefunctionalpropertiesofelectrospunpolybenzimidazoleseparatorsforlithiummetalbatteries
AT vijayakumarvijayalekshmi effectofcrosslinkingandsurfacetreatmentonthefunctionalpropertiesofelectrospunpolybenzimidazoleseparatorsforlithiummetalbatteries
AT haridasanupriyak effectofcrosslinkingandsurfacetreatmentonthefunctionalpropertiesofelectrospunpolybenzimidazoleseparatorsforlithiummetalbatteries
AT ahnjouhyeon effectofcrosslinkingandsurfacetreatmentonthefunctionalpropertiesofelectrospunpolybenzimidazoleseparatorsforlithiummetalbatteries
AT namsangyong effectofcrosslinkingandsurfacetreatmentonthefunctionalpropertiesofelectrospunpolybenzimidazoleseparatorsforlithiummetalbatteries