Interaction of High Flash Point Electrolytes and PE-Based Separators for Li-Ion Batteries

International Journal of Molecular Sciences
Andreas HofmannThomas Hanemann

Abstract

In this study, promising electrolytes for use in Li-ion batteries are studied in terms of interacting and wetting polyethylene (PE) and particle-coated PE separators. The electrolytes are characterized according to their physicochemical properties, where the flow characteristics and the surface tension are of particular interest for electrolyte-separator interactions. The viscosity of the electrolytes is determined to be in a range of η = 4-400 mPa∙s and surface tension is finely graduated in a range of γL = 23.3-38.1 mN∙m(-1). It is verified that the technique of drop shape analysis can only be used in a limited matter to prove the interaction, uptake and penetration of electrolytes by separators. Cell testing of Li|NMC half cells reveals that those cell results cannot be inevitably deduced from physicochemical electrolyte properties as well as contact angle analysis. On the other hand, techniques are more suitable which detect liquid penetration into the interior of the separator. It is expected that the results can help fundamental researchers as well as users of novel electrolytes in current-day Li-ion battery technologies for developing and using novel material combinations.

References

Dec 7, 2006·Physical Chemistry Chemical Physics : PCCP·Jean-Claude LassèguesDavid Talaga
Dec 31, 2009·The Journal of Physical Chemistry. B·My Loan Phung LePatrick Judeinstein
Jul 6, 2013·Materials Science & Engineering. C, Materials for Biological Applications·Ajit K SharmaNishith Verma
Aug 26, 2014·International Journal of Molecular Sciences·Marija KirchhöferStefano Passerini
Oct 28, 2014·The Journal of Physical Chemistry. B·Daniel M SeoWesley A Henderson

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Citations

Oct 19, 2017·Optics Express·Guilherme DutraSvetlana Dligatch

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Methods Mentioned

BETA
X-ray

Software Mentioned

SCA20

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