Inorganic thin layer coated porous separator with high thermal stability for safety reinforced Li-ion battery

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

A novel approach for improving the thermal and dimensional stability of a polymer based separator is investigated. The surface of the micropores in the polyolefin based separator is fully covered by a thin layer of SiO 2 deposited by the chemical vapor deposition method. Through this new process, the thermal and dimensional stability of the microporous separators is greatly enhanced, thus allowing the commercialization of polymer based separators for large sized battery systems. The morphology of the modified separators as a function of the thickness of the inorganic layer is considered to be a key factor for the optimization of their thermal and dimensional stability without sacrificing their ionic conductivity for the sake of the cell performance. At the optimum thickness of the thin and conformal layer of SiO 2, we obtain a polymer separator which is highly stable at high temperature, even above the melting point of the polymer membrane, with satisfactory cell performance, such as its ion conductivity, C-rate and cycle life.

Original languageEnglish
Pages (from-to)22-27
Number of pages6
JournalJournal of Power Sources
Volume212
DOIs
Publication statusPublished - 2012 Aug 15

Fingerprint

separators
Separators
electric batteries
safety
Thermodynamic stability
thermal stability
dimensional stability
Dimensional stability
Polymers
ions
polymers
commercialization
Polyolefins
Ionic conductivity
cells
ion currents
melting points
Melting point
Lithium-ion batteries
Life cycle

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

@article{9944ece8786f4a96b13146424494f500,
title = "Inorganic thin layer coated porous separator with high thermal stability for safety reinforced Li-ion battery",
abstract = "A novel approach for improving the thermal and dimensional stability of a polymer based separator is investigated. The surface of the micropores in the polyolefin based separator is fully covered by a thin layer of SiO 2 deposited by the chemical vapor deposition method. Through this new process, the thermal and dimensional stability of the microporous separators is greatly enhanced, thus allowing the commercialization of polymer based separators for large sized battery systems. The morphology of the modified separators as a function of the thickness of the inorganic layer is considered to be a key factor for the optimization of their thermal and dimensional stability without sacrificing their ionic conductivity for the sake of the cell performance. At the optimum thickness of the thin and conformal layer of SiO 2, we obtain a polymer separator which is highly stable at high temperature, even above the melting point of the polymer membrane, with satisfactory cell performance, such as its ion conductivity, C-rate and cycle life.",
author = "Min Kim and Park, {Jong Hyeok}",
year = "2012",
month = "8",
day = "15",
doi = "10.1016/j.jpowsour.2012.03.038",
language = "English",
volume = "212",
pages = "22--27",
journal = "Journal of Power Sources",
issn = "0378-7753",
publisher = "Elsevier",

}

Inorganic thin layer coated porous separator with high thermal stability for safety reinforced Li-ion battery. / Kim, Min; Park, Jong Hyeok.

In: Journal of Power Sources, Vol. 212, 15.08.2012, p. 22-27.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Inorganic thin layer coated porous separator with high thermal stability for safety reinforced Li-ion battery

AU - Kim, Min

AU - Park, Jong Hyeok

PY - 2012/8/15

Y1 - 2012/8/15

N2 - A novel approach for improving the thermal and dimensional stability of a polymer based separator is investigated. The surface of the micropores in the polyolefin based separator is fully covered by a thin layer of SiO 2 deposited by the chemical vapor deposition method. Through this new process, the thermal and dimensional stability of the microporous separators is greatly enhanced, thus allowing the commercialization of polymer based separators for large sized battery systems. The morphology of the modified separators as a function of the thickness of the inorganic layer is considered to be a key factor for the optimization of their thermal and dimensional stability without sacrificing their ionic conductivity for the sake of the cell performance. At the optimum thickness of the thin and conformal layer of SiO 2, we obtain a polymer separator which is highly stable at high temperature, even above the melting point of the polymer membrane, with satisfactory cell performance, such as its ion conductivity, C-rate and cycle life.

AB - A novel approach for improving the thermal and dimensional stability of a polymer based separator is investigated. The surface of the micropores in the polyolefin based separator is fully covered by a thin layer of SiO 2 deposited by the chemical vapor deposition method. Through this new process, the thermal and dimensional stability of the microporous separators is greatly enhanced, thus allowing the commercialization of polymer based separators for large sized battery systems. The morphology of the modified separators as a function of the thickness of the inorganic layer is considered to be a key factor for the optimization of their thermal and dimensional stability without sacrificing their ionic conductivity for the sake of the cell performance. At the optimum thickness of the thin and conformal layer of SiO 2, we obtain a polymer separator which is highly stable at high temperature, even above the melting point of the polymer membrane, with satisfactory cell performance, such as its ion conductivity, C-rate and cycle life.

UR - http://www.scopus.com/inward/record.url?scp=84860304909&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84860304909&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2012.03.038

DO - 10.1016/j.jpowsour.2012.03.038

M3 - Article

VL - 212

SP - 22

EP - 27

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

ER -