Journal
ADVANCED MATERIALS
Volume 26, Issue 43, Pages 7386-7392Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201402103
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Funding
- Boulder Ionics Corporation through the Membrane Science, Engineering and Technology (MAST) Center at CU-Boulder, an NSF Industry-University Cooperative Research Center
- National Science Foundation [IIP-1152040]
- National Science Foundation (NSF) [CHE-1231048]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1231048] Funding Source: National Science Foundation
- Div Of Industrial Innovation & Partnersh
- Directorate For Engineering [1152040, 1034720] Funding Source: National Science Foundation
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High-energy-density FeS2 cathodes 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.
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