Mixtures of alkylcarbonate electrolytes with an ionic liquid (IL) and a lithium salt have been studied in order to develop new electrolytes for lithium-ion cells with enhanced safety profiles. In this work the influence of the addition of N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Py14TFSI) on the electrochemical properties of commercial carbonate-based electrolytes, i.e. 1 M LiPF6 in EC:DMC (LP30) and in EC:DMC:DEC (LP71) is reported. Four new electrolyte compositions have been prepared and characterized. The addition of the ionic liquid in the electrolyte carbonate-based solution results in (i) an ionic conductivity comparable with that of the pristine IL-free carbonate-based electrolyte, (ii) the enlargement of the electrochemical stability window, and (iii) a large reduction of the self-extinguish time (SET) of the electrolyte mixture when exposed to a free flame. All the newly developed electrolytes have been tested in lithium cells versus LiFePO4 and Li4Ti5O12 electrodes: the cells show good performances in galvanostatic cycling. The best performing electrolyte i.e. LP30/Py14TFSI 70/30 wt/wt has been also successfully tested in a full Li-ion cell realized by coupling LiFePO4 and Li4Ti5O12 electrodes. (C) 2012 Elsevier B.V. All rights reserved.

Mixtures of ionic liquid - Alkylcarbonates as electrolytes for safe lithium-ion batteries / Lombardo, Lucia; Sergio, Brutti; Navarra, MARIA ASSUNTA; Panero, Stefania; Priscilla, Reale. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 227:(2013), pp. 8-14. [10.1016/j.jpowsour.2012.11.017]

Mixtures of ionic liquid - Alkylcarbonates as electrolytes for safe lithium-ion batteries

LOMBARDO, LUCIA;Sergio Brutti;NAVARRA, MARIA ASSUNTA;PANERO, Stefania;
2013

Abstract

Mixtures of alkylcarbonate electrolytes with an ionic liquid (IL) and a lithium salt have been studied in order to develop new electrolytes for lithium-ion cells with enhanced safety profiles. In this work the influence of the addition of N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (Py14TFSI) on the electrochemical properties of commercial carbonate-based electrolytes, i.e. 1 M LiPF6 in EC:DMC (LP30) and in EC:DMC:DEC (LP71) is reported. Four new electrolyte compositions have been prepared and characterized. The addition of the ionic liquid in the electrolyte carbonate-based solution results in (i) an ionic conductivity comparable with that of the pristine IL-free carbonate-based electrolyte, (ii) the enlargement of the electrochemical stability window, and (iii) a large reduction of the self-extinguish time (SET) of the electrolyte mixture when exposed to a free flame. All the newly developed electrolytes have been tested in lithium cells versus LiFePO4 and Li4Ti5O12 electrodes: the cells show good performances in galvanostatic cycling. The best performing electrolyte i.e. LP30/Py14TFSI 70/30 wt/wt has been also successfully tested in a full Li-ion cell realized by coupling LiFePO4 and Li4Ti5O12 electrodes. (C) 2012 Elsevier B.V. All rights reserved.
2013
safety; lithium; battery; alkylcarbonate; electrolyte; ionic liquid
01 Pubblicazione su rivista::01a Articolo in rivista
Mixtures of ionic liquid - Alkylcarbonates as electrolytes for safe lithium-ion batteries / Lombardo, Lucia; Sergio, Brutti; Navarra, MARIA ASSUNTA; Panero, Stefania; Priscilla, Reale. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - STAMPA. - 227:(2013), pp. 8-14. [10.1016/j.jpowsour.2012.11.017]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/503528
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