Counterintuitive trends of the wetting behavior of ionic liquid-based electrolytes on modified lithium electrodes
作者： Paulo Schmitz , Martin Kolek , Diddo Diddens , Marian Cristian Stan , Kirsi Jalkanen
DOI: 10.1039/C7CP03716C
关键词:
摘要: The demand for high energy densities has brought rechargeable lithium metal batteries back into the research focus. Ionic liquids (ILs) are considered as suitable electrolyte components these systems. In this work, wetting behavior of 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide ([C2MIm]TFSI), 1-butyl-3-methylimidazolium bis-((trifluoromethyl)sulfonyl)imide ([C4MIm]TFSI), 1-hexyl-3-methylimidazolium ([C6MIm]TFSI), and N-butyl-N-methylpyrrolidinium (Pyr14TFSI) on mechanically modified electrodes, with without (LiTFSI) conducting salt, is investigated compared to an organic carbonate-based electrolyte. Three different patterns were chosen modification, enabling a surface area increase 12%, 20%, 56% electrodes. Especially pure ILs, contact angle was significantly larger higher areas Since addition LiTFSI remarkably decreased angles ILs surfaces, it could be shown that effect can attributed tension. This observation explained by interruption ordering ionic liquid cations anions, which supported Raman spectroscopy molecular dynamics (MD) simulations.
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