리튬이온 이차전지용 미세다공성 폴리에틸렌 분리막의 열적 안정성 향상을 위한 내열 고분자층 코팅

Translated title of the contribution: Coating of Heat-resistant Polymeric Layer to Enhance Thermal Stability of Microporous Polyethylene Separator for Lithium-ion Secondary Battery

Jungmoon Sung, Junyoung Park, Hyun Wook Jung

Research output: Contribution to journalArticlepeer-review

Abstract

It is very important to impart enhanced thermal stability to polyolefin-based separators for the fabrication of Li-ion secondary batteries with high energy density. For this purpose, in this study, a heat-resistant polyamide-imide (PAI) polymer solution was coated onto a microporous polyethylene (PE) separator with a nano-sized coating thickness, employing a continuous slot coating process. Through attended total reflection infrared spectroscopy (ATR-FTIR) and scanning electron microscope (SEM) measurements, a thin coating of PAI inside the microporous membrane was confirmed, and the relation between the PAI coating amount and the change in pore structures on membrane surface and cross-section was clearly identified. In addition, various characteristics of the separator such as permeability, porosity, and shrinkage before and after PAI coating were systematically investigated. Based on these experimental results, it was found that the PAI coating of 1.23 g/m2 optimally enhanced the heat resistance properties of the PE-1 separator.

Translated title of the contributionCoating of Heat-resistant Polymeric Layer to Enhance Thermal Stability of Microporous Polyethylene Separator for Lithium-ion Secondary Battery
Original languageKorean
Pages (from-to)456-463
Number of pages8
JournalPolymer (Korea)
Volume45
Issue number3
DOIs
Publication statusPublished - 2021 May

Bibliographical note

Publisher Copyright:
© 2021 The Polymer Society of Korea. All rights reserved.

ASJC Scopus subject areas

  • General Chemical Engineering
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Coating of Heat-resistant Polymeric Layer to Enhance Thermal Stability of Microporous Polyethylene Separator for Lithium-ion Secondary Battery'. Together they form a unique fingerprint.

Cite this