Facile and nonradiation pretreated membrane as a high conductive separator for li-ion batteries

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DOIResolve DOI: http://doi.org/10.1021/acsami.5b05718
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TypeArticle
Journal titleACS Applied Materials and Interfaces
ISSN1944-8244
Volume7
Issue36
Pages2018420189; # of pages: 6
Subjectpolyolefin membranes; nonradiation; separator; high lithium-ion conductivity; lithium-ion battery
AbstractPolPolyolefin membranes are widely used as separators in commercialized Li-ion batteries. They have less polarized surfaces compared with polarized molecules of electrolyte, leading to a poor wetting state for separators. Radiation pretreatments are often adopted to solve such a problem. Unfortunately, they can only activate several nanometers deep from the surface, which limits the performance improvement. Here we report a facile and scalable method to polarize polyolefin membranes via a chemical oxidation route. On the surfaces of pretreated membrane, layers of poly(ethylene oxide) and poly(acrylic acid) can easily be coated, thus resulting in a high Li-ion conductivity of the membrane. Assembled with this decorated separator in button cells, both high-voltage (Li1.2Mn0.54Co0.13Ni0.13O2) and moderate-voltage (LiFePO4) cathode materials show better electrochemical performances than those assembled with pristine polyolefin separators.
Publication date
LanguageEnglish
AffiliationEnergy, Mining and Environment; National Research Council Canada
Peer reviewedYes
NPARC number21277043
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Record identifieref41fbb6-cc6b-4645-8fdc-eec93b108bf7
Record created2015-11-10
Record modified2016-05-09
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