Nano SiO2 particle formation and deposition on polypropylene separators for lithium-ion batteries

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2011.10.130
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TypeArticle
Journal titleJournal of Power Sources
Volume206
Issue15 May 2012
Pages325333; # of pages: 9
SubjectLithium-ion batteries; Separators; Silica coating; Rate capability; Thermal shrinkage
AbstractThe novelty of this work is the formation and deposition of SiO2, as opposed to deposition using commercially available SiO2 powder suspension in the solution, to form ceramic coating on polypropylene (PP) separators for lithium-ion battery. The formation of SiO2 nanoparticles with uniform particle size is accomplished through direct hydrolysis of tetraethyl orthosilicate (TEOS), while the deposition of the formed SiO2 on PP separators was conducted in the same solution containing polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) as binders and acetone as the solvent. The effects of the ceramic coating on the surface morphology, tensile strength, contact angles, electrolyte uptake, thermal shrinkage of the PP separators and the cell performances such as batter rate capability and Coulombic efficiency were investigated. The coated separators show significant reduction in thermal shrinkage and improvement in tensile strength, contact angles, electrolyte uptake and battery performance as compared to the plain PP separator.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology; NRC Industrial Materials Institute; National Research Council Canada
Peer reviewedYes
NRC number53035
NPARC number19830681
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Record identifiera8737a5c-3f65-4daf-afb1-805b0db5fd2b
Record created2012-04-20
Record modified2016-05-09
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