Deep eutectic solvent electrolytes based on trifluoroacetamide and LiPF6 for Li-metal batteries

Lorenzo Mezzomo; Nicolò Pianta; Irene Ostroman; Niv Aloni; Diana Golodnitsky; Emanuel Peled; Piercarlo Mustarelli; Riccardo Ruffo

doi:10.1016/j.jpowsour.2023.232746

Deep eutectic solvent electrolytes based on trifluoroacetamide and LiPF₆ for Li-metal batteries

Lorenzo Mezzomo, Nicolò Pianta, Irene Ostroman, Niv Aloni, Diana Golodnitsky, Emanuel Peled, Piercarlo Mustarelli^*, Riccardo Ruffo

^*Corresponding author for this work

School of Chemistry

University of Milan - Bicocca
National Reference Center for Electrochemical Energy Storage (GISEL) - Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM)

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

New generation lithium batteries require better performances, improved safety, and sustainability. Better performances can be obtained with lithium anodes and high-voltage cathodes, which in turn pose more pressure on the electrolyte stability, which is mandatory for safety. Deep Eutectic Solvents (DESs) are promising components for safer and more environmentally sustainable electrolytes. We investigate the physico-chemical properties of DESs made with 2,2,2-trifluoroacetamide (TFA) and LiPF₆. The best composition is tested against Li metal and two cathode active materials: LiFePO₄ (LFP) and high voltage LiNi_1-x-yMn_xCo_yO₂ (NMC). We obtain good electrochemical performance in a Li-metal cell with LFP. Accelerated rate calorimetry shows improved thermal stability of the Li|DES|NMC cell with respect to a commercial liquid electrolyte.

Original language	English
Article number	232746
Journal	Journal of Power Sources
Volume	561
DOIs	https://doi.org/10.1016/j.jpowsour.2023.232746
State	Published - 30 Mar 2023

Funding

Funders	Funder number
Ministero dell’Istruzione, dell’Università e della Ricerca
Ministero degli Affari Esteri e della Cooperazione Internazionale
Regione Lombardia
Lægemiddelindustriforeningen

Keywords

Accelerated rate calorimetry
Deep eutectic solvents
Electrolyte
LiPF
Lithium metal batteries

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2023.232746

Cite this

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title = "Deep eutectic solvent electrolytes based on trifluoroacetamide and LiPF6 for Li-metal batteries",

abstract = "New generation lithium batteries require better performances, improved safety, and sustainability. Better performances can be obtained with lithium anodes and high-voltage cathodes, which in turn pose more pressure on the electrolyte stability, which is mandatory for safety. Deep Eutectic Solvents (DESs) are promising components for safer and more environmentally sustainable electrolytes. We investigate the physico-chemical properties of DESs made with 2,2,2-trifluoroacetamide (TFA) and LiPF6. The best composition is tested against Li metal and two cathode active materials: LiFePO4 (LFP) and high voltage LiNi1-x-yMnxCoyO2 (NMC). We obtain good electrochemical performance in a Li-metal cell with LFP. Accelerated rate calorimetry shows improved thermal stability of the Li|DES|NMC cell with respect to a commercial liquid electrolyte.",

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AU - Mezzomo, Lorenzo

AU - Pianta, Nicolò

AU - Ostroman, Irene

AU - Aloni, Niv

AU - Golodnitsky, Diana

AU - Peled, Emanuel

AU - Mustarelli, Piercarlo

AU - Ruffo, Riccardo

PY - 2023/3/30

Y1 - 2023/3/30

N2 - New generation lithium batteries require better performances, improved safety, and sustainability. Better performances can be obtained with lithium anodes and high-voltage cathodes, which in turn pose more pressure on the electrolyte stability, which is mandatory for safety. Deep Eutectic Solvents (DESs) are promising components for safer and more environmentally sustainable electrolytes. We investigate the physico-chemical properties of DESs made with 2,2,2-trifluoroacetamide (TFA) and LiPF6. The best composition is tested against Li metal and two cathode active materials: LiFePO4 (LFP) and high voltage LiNi1-x-yMnxCoyO2 (NMC). We obtain good electrochemical performance in a Li-metal cell with LFP. Accelerated rate calorimetry shows improved thermal stability of the Li|DES|NMC cell with respect to a commercial liquid electrolyte.

AB - New generation lithium batteries require better performances, improved safety, and sustainability. Better performances can be obtained with lithium anodes and high-voltage cathodes, which in turn pose more pressure on the electrolyte stability, which is mandatory for safety. Deep Eutectic Solvents (DESs) are promising components for safer and more environmentally sustainable electrolytes. We investigate the physico-chemical properties of DESs made with 2,2,2-trifluoroacetamide (TFA) and LiPF6. The best composition is tested against Li metal and two cathode active materials: LiFePO4 (LFP) and high voltage LiNi1-x-yMnxCoyO2 (NMC). We obtain good electrochemical performance in a Li-metal cell with LFP. Accelerated rate calorimetry shows improved thermal stability of the Li|DES|NMC cell with respect to a commercial liquid electrolyte.

KW - Accelerated rate calorimetry

KW - Deep eutectic solvents

KW - Electrolyte

KW - LiPF

KW - Lithium metal batteries

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