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

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


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.

Original languageEnglish
Article number232746
JournalJournal of Power Sources
StatePublished - 30 Mar 2023


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


    • Accelerated rate calorimetry
    • Deep eutectic solvents
    • Electrolyte
    • LiPF
    • Lithium metal batteries


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