Crosslinkable polyhedral silsesquioxane-based ceramic-coated separators for Li-ion batteries

Hyunkyu Jeon, Youngjoon Roh, Dahee Jin, Myung Hyun Ryou, Yong Cheol Jeong, Yong Min Lee

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Inorganic polyhedral oligomeric silsesquioxane with epoxy functional groups (ePOSS) is newly presented as a co-binder for the ceramic-coated separator (CCS) for safe Li-ion batteries. The ePOSS-incorporated coating layer significantly improved the dimensional stability of the CCS at 140 °C and maintained the original form even after an ignition test. Although the permeability of the CCS was slightly decreased due to the crosslinked structure of the silsesquioxane coating layer, it showed high electrochemical stability up to 5 V. Moreover, the improved liquid electrolyte wettability by ePOSS co-binder enhanced the ionic conductivity and showed 93% of cycle capacity at 0.5C rate in Li-ion batteries.

Original languageEnglish
Pages (from-to)277-283
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume71
DOIs
StatePublished - 25 Mar 2019

Bibliographical note

Publisher Copyright:
© 2018 The Korean Society of Industrial and Engineering Chemistry

Keywords

  • Ceramic-coated separator
  • Flame retardancy
  • Li-ion battery
  • Silsesquioxane
  • Thermal stability

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