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

Yanilmaz M., Lu Y., Li Y., Zhang X.

JOURNAL OF POWER SOURCES, vol.273, pp.1114-1119, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 273
  • Publication Date: 2015
  • Doi Number: 10.1016/j.jpowsour.2014.10.015
  • Journal Name: JOURNAL OF POWER SOURCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1114-1119
  • Istanbul Technical University Affiliated: Yes

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. (C) 2014 Elsevier B.V. All rights reserved.