SiO2/polyacrylonitrile membranes via centrifugal spinning as a separator for Li-ion batteries

Meltem Yanilmaz, Yao Lu, Ying Li, Xiangwu Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

88 Citations (Scopus)

Abstract

Centrifugal spinning is a fast, cost-effective and safe alternative to the electrospinning technique, which is commonly used for making fiber-based separator membranes. In this work, SiO2/polyacrylonitrile (PAN) membranes were produced by using centrifugal spinning and they were characterized by using different electrochemical techniques for use as separators in Li-ion batteries. SiO2/PAN membranes exhibited good wettability and high ionic conductivity due to their highly porous fibrous structure. Compared with commercial microporous polyolefin membranes, SiO2/PAN membranes had larger liquid electrolyte uptake, higher electrochemical oxidation limit, and lower interfacial resistance with lithium. SiO2/PAN membrane separators were assembled into lithium/lithium iron phosphate cells and these cells delivered high capacities and exhibited good cycling performance at room temperature. In addition, cells using SiO2/PAN membranes showed superior C-rate performance compared to those using microporous PP membrane.

Original languageEnglish
Pages (from-to)1114-1119
Number of pages6
JournalJournal of Power Sources
Volume273
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.

Keywords

  • Battery separator
  • Centrifugal spinning
  • Electrospinning
  • Polyacrylonitrile
  • Silica

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