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A study of mass transport in a Room Temperature Ionic Liquid
KTH, School of Chemical Science and Engineering (CHE).
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In this thesis report the mass transport properties of Li-TFSI salt in a Room Temperature Ionic Liquid (RTIL) and an organic-RTIL mix electrolyte were evaluated. It was concluded that for all the electrolytes studied the high diffusion potential drop, i.e. poor mass transport of \ce{Li+}, had the largest impact on the overall electrolyte performance. Even tough the conductivity of the RTIL was good the poor mass transport resulted in an overall poor performance. The best performance was observed at high organic electrolyte and Li-TFSI content (low RTIL content). Elevated temperature also improved the performance. The RTIL used was ethyl-methyl-imidazolium bis(trifluoromethylsulfonyl)-imide (EMI-TFSI). Ethylene carbonate (EC) was used in the mixed electrolyte. The performance of the electrolyte was determined by calculating the Normalized Potential Gradient (NPG), this figure of merit includes both ohmic and diffusion losses thus identifying the poor mass transport properties.

Place, publisher, year, edition, pages
2012. , 14 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-158490OAI: oai:DiVA.org:kth-158490DiVA: diva2:777129
Available from: 2015-01-08 Created: 2015-01-08 Last updated: 2015-01-08Bibliographically approved

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