Co-polyimide-coated polyethylene separators for enhanced thermal stability of lithium ion batteries

Jongchan Song; Myung Hyun Ryou; Bongki Son; Je Nam Lee; Dong Jin Lee; Yong Min Lee; Jang Wook Choi; Jung Ki Park

doi:10.1016/j.electacta.2012.06.078

Co-polyimide-coated polyethylene separators for enhanced thermal stability of lithium ion batteries

Jongchan Song, Myung Hyun Ryou, Bongki Son, Je Nam Lee, Dong Jin Lee, Yong Min Lee, Jang Wook Choi, Jung Ki Park

Department of Energy and Science and Engineering

Research output: Contribution to journal › Article › peer-review

154 Scopus citations

Abstract

The thermal shrinkage of the widely adopted polyethylene (PE) separators has become a very critical issue for safety in lithium ion batteries, especially for electrical vehicle applications. As an effort to minimize the thermal shrinkage of PE separators, in this study, we coat PE separators with a substance from the polyimide family by engaging a simple dipping method. A polymer coating at the optimal concentration endows PE separators with improved mechanical strength and thus remarkably increased resistance against thermal shrinkage at elevated temperatures. Despite the coating layers, the cells with the polyimide-coated separators exhibit almost identical electrochemical properties to those of the cells with the bare PE separators, thus proving that the polymer coating does not affect the battery performance. The preserved electrochemical properties can be explained by morphology and porosity characterization.

Original language	English
Pages (from-to)	524-530
Number of pages	7
Journal	Electrochimica Acta
Volume	85
DOIs	https://doi.org/10.1016/j.electacta.2012.06.078
State	Published - 15 Dec 2012

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2009-0094219 , NRF-2010-0029031 and the Human Resource Training Project for Regional Innovation) and by a grant from by the Korea Science & Engineering Foundation (KOSEF) grant (WCU program, 31-2008-000-10055-0) funded by the Ministry of Education and Science & Technology (MEST) .

Keywords

Lithium ion batteries
Polyethylene
Polyimide
Separators
Thermal shrinkage

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.electacta.2012.06.078

Cite this

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title = "Co-polyimide-coated polyethylene separators for enhanced thermal stability of lithium ion batteries",

abstract = "The thermal shrinkage of the widely adopted polyethylene (PE) separators has become a very critical issue for safety in lithium ion batteries, especially for electrical vehicle applications. As an effort to minimize the thermal shrinkage of PE separators, in this study, we coat PE separators with a substance from the polyimide family by engaging a simple dipping method. A polymer coating at the optimal concentration endows PE separators with improved mechanical strength and thus remarkably increased resistance against thermal shrinkage at elevated temperatures. Despite the coating layers, the cells with the polyimide-coated separators exhibit almost identical electrochemical properties to those of the cells with the bare PE separators, thus proving that the polymer coating does not affect the battery performance. The preserved electrochemical properties can be explained by morphology and porosity characterization.",

keywords = "Lithium ion batteries, Polyethylene, Polyimide, Separators, Thermal shrinkage",

author = "Jongchan Song and Ryou, {Myung Hyun} and Bongki Son and Lee, {Je Nam} and Lee, {Dong Jin} and Lee, {Yong Min} and Choi, {Jang Wook} and Park, {Jung Ki}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2009-0094219 , NRF-2010-0029031 and the Human Resource Training Project for Regional Innovation) and by a grant from by the Korea Science & Engineering Foundation (KOSEF) grant (WCU program, 31-2008-000-10055-0) funded by the Ministry of Education and Science & Technology (MEST) .",

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T1 - Co-polyimide-coated polyethylene separators for enhanced thermal stability of lithium ion batteries

AU - Song, Jongchan

AU - Ryou, Myung Hyun

AU - Son, Bongki

AU - Lee, Je Nam

AU - Lee, Dong Jin

AU - Lee, Yong Min

AU - Choi, Jang Wook

AU - Park, Jung Ki

N1 - Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2009-0094219 , NRF-2010-0029031 and the Human Resource Training Project for Regional Innovation) and by a grant from by the Korea Science & Engineering Foundation (KOSEF) grant (WCU program, 31-2008-000-10055-0) funded by the Ministry of Education and Science & Technology (MEST) .

PY - 2012/12/15

Y1 - 2012/12/15

N2 - The thermal shrinkage of the widely adopted polyethylene (PE) separators has become a very critical issue for safety in lithium ion batteries, especially for electrical vehicle applications. As an effort to minimize the thermal shrinkage of PE separators, in this study, we coat PE separators with a substance from the polyimide family by engaging a simple dipping method. A polymer coating at the optimal concentration endows PE separators with improved mechanical strength and thus remarkably increased resistance against thermal shrinkage at elevated temperatures. Despite the coating layers, the cells with the polyimide-coated separators exhibit almost identical electrochemical properties to those of the cells with the bare PE separators, thus proving that the polymer coating does not affect the battery performance. The preserved electrochemical properties can be explained by morphology and porosity characterization.

AB - The thermal shrinkage of the widely adopted polyethylene (PE) separators has become a very critical issue for safety in lithium ion batteries, especially for electrical vehicle applications. As an effort to minimize the thermal shrinkage of PE separators, in this study, we coat PE separators with a substance from the polyimide family by engaging a simple dipping method. A polymer coating at the optimal concentration endows PE separators with improved mechanical strength and thus remarkably increased resistance against thermal shrinkage at elevated temperatures. Despite the coating layers, the cells with the polyimide-coated separators exhibit almost identical electrochemical properties to those of the cells with the bare PE separators, thus proving that the polymer coating does not affect the battery performance. The preserved electrochemical properties can be explained by morphology and porosity characterization.

KW - Lithium ion batteries

KW - Polyethylene

KW - Polyimide

KW - Separators

KW - Thermal shrinkage

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DO - 10.1016/j.electacta.2012.06.078

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SN - 0013-4686

VL - 85

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JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Co-polyimide-coated polyethylene separators for enhanced thermal stability of lithium ion batteries

Abstract

Bibliographical note

Keywords

UN SDGs

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