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Enhancement of Functional Properties of Liquid Electrolytes for Lithium-Ion Batteries by Addition of Pyrrolidinium-Based Ionic Liquids with Long Alkyl-Chains

Celeste, Arcangelo (author)
Università degli Studi di Genova,University of Genoa,Fondazione Istituto Italiano di Tecnologia
Silvestri, Laura (author)
ENEA Centro Ricerche,ENEA Research Centre
Agostini, Marco, 1987 (author)
Chalmers tekniska högskola,Chalmers University of Technology
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Sadd, Matthew, 1994 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Palumbo, Stefano (author)
Fondazione Istituto Italiano di Tecnologia
Panda, Jaya Cumar (author)
Fondazione Istituto Italiano di Tecnologia
Matic, Aleksandar, 1968 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Pellegrini, Vittorio (author)
Fondazione Istituto Italiano di Tecnologia
Brutti, Sergio (author)
Universita degli Studi di Roma la Sapienza,Sapienza University of Rome
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 (creator_code:org_t)
2020-05-27
2020
English.
In: Batteries and Supercaps. - : Wiley. - 2566-6223. ; 3:10, s. 1059-1068
Related links:
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Three ionic liquid belonging to the N-alkyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl) imides (Pyr(1),nTFSI with n=4,5,8) have been added as co-solvent to two commonly used electrolytes for Li-ion cells: (a) 1 M lithium hexafluorophosphate (LiPF6) in a mixture of ethylene carbonate (EC) and linear like dimethyl carbonate (DMC) in 1 : 1 v/v and (b) 1 M lithium bis-(trifluoromethanesulfonyl)imide (LiTFSI) in EC : DMC 1 : 1 v/v. These electrolyte formulations (classified as P and T series containing LiPF6 or LiTFSI salts, respectively) have been analyzed by comparing ionic conductivities, transport numbers, viscosities, electrochemical stability as well as vibrational properties. In the case of the Pyr(1,5)TFSI and Pyr(1,8)TFSI blended formulations, this is the first ever reported detailed study of their functional properties in Li-ion cells electrolytes. Overall, P-electrolytes demonstrate enhanced properties compared to the T-ones. Among the various P electrolytes those containing Pyr(1,4)TFSI and Pyr(1,5)TFSI limit the accumulation of irreversible capacity upon cycling with satisfactory performance in lithium cells.

Subject headings

NATURVETENSKAP  -- Kemi -- Materialkemi (hsv//swe)
NATURAL SCIENCES  -- Chemical Sciences -- Materials Chemistry (hsv//eng)
NATURVETENSKAP  -- Fysik -- Annan fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Other Physics Topics (hsv//eng)

Keyword

Li-ion batteries
non-aqueous electrolytes
mitigation of the irreversible capacity in Li-ion cells
ionic liquids

Publication and Content Type

art (subject category)
ref (subject category)

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