Ionic Liquid Enabled FeS2 for High‐Energy‐Density Lithium‐Ion Batteries. (18th September 2014)

• Record Type: Journal Article
• Authors: Evans, Tyler; Piper, Daniela Molina; Kim, Seul Cham; Han, Sang Sub; Bhat, Vinay; Oh, Kyu Hwan; Lee, Se‐Hee
• Is Part Of: Advanced materials. Volume 26:Number 43(2014)
• Page Start: 7386
• Page End: 7392
• Publication Date: 2014-09-18
• Subjects: Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201402103
• Languages: English
• ISSNs: 0935-9648

Abstract

<abstract abstract-type="graphical" xml:lang="en" id="adma201402103-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p> <bold>High‐energy‐density FeS</bold> ₂ <bold>cathodes</bold> en­abled by a bis(trifluoromethanesulfonyl)imide (TFSI−) anion‐based room temperature ionic liquid (RTIL) electrolyte are demonstrated. A TFSI‐based ionic liquid (IL) significantly mitigates polysulfide dissolution, and therefore the parasitic redox shuttle mechanism, that plagues sulfur‐based electrode chemistries. FeS₂ stabilization with a TFSI⁻‐based IL results in one of the highest energy density cathodes, 542 W h kg⁻¹ (normalized to cathode composite mass), reported to date. <boxed-text content-type="graphic" position="anchor" orientation="portrait"><graphic position="anchor" mimetype="image" xlink:href="ark:/27927/pgh3m33tx09" orientation="portrait" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></boxed-text></p> </abstract>