Journal
JOURNAL OF POWER SOURCES
Volume 323, Issue -, Pages 17-22Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2016.05.022
Keywords
Phase inversion; Battery separator; Porous; Rate capability; Lithium ion battery
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The separator is a porous membrane located between the negative and the positive electrodes. In this work, a nano-fiber reinforced composite separator was developed. Compared with the commercial polyolefin separator, the composite separator showed superior (a) dimensional stability at elevated temperatures relative to conventional separators and (b) wettability by the liquid electrolyte. After being saturated with a commercial LiPF6-ethylene carbonate-dimethyl carbonate electrolyte, the composite separator enabled a high effective ionic conductivity (sigma(eff)) of 1.25 mS/cm. A stable cycle performance and an improved rate capability have been observed in the coin cells with the composite separator. This initial study shows that this type of composite membranes can be a promising alternative separator for lithium ion batteries. (C) 2016 Elsevier B.V. All rights reserved.
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