Recent Progresses in Ionic Liquid-Based Electrolytes for Hybrid Multivalent Metals Secondary Batteries

Tuesday, 15 October 2019: 16:40
Room 304 (The Hilton Atlanta)
G. Pagot (Dept. of Industrial Engineering, University of Padova, Centro Studi “Giorgio Levi Cases”), K. Vezzù (Dept. of Industrial Engineering, University of Padova, CMBM, University of Padova), A. Nale (Dept. of Industrial Engineering, University of Padova), E. Negro (Dept. of Industrial Engineering, University of Padova, Centro Studi "Giorgio Levi Cases"), S. Greenbaum (Department of Physics and Astronomy, Hunter College, CUNY), and V. Di Noto (Dept. of Industrial Engineering, University of Padova, INSTM)
The seeking of stable and high-performing electrolytes is the major bottleneck to the development of future secondary batteries belonging to the so-called beyond Li-ion technology. In particular, electrolytes able to reversibly deposit and strip multivalent metals seem to be the answer to the growing energy demand requested by the Electric Vehicles market. Indeed, the multi-electron chemistry could ensure a higher energy value per moles of active material.

In this concern, Ionic Liquids (ILs) are considered attractive materials thanks to their low volatility, negligible flammability and good electrochemical performance in the metal reversible deposition processes [1-3]. Indeed, it was recently demonstrated that these electrolytes are able to deposit and strip magnesium/metal alloys with Coulombic efficiencies higher than 99%, overpotentials lower than 50 mV vs. Mg/Mg2+ and remarkable current densities (Fig. 1).

In this report, an overview on the most recent progresses in IL-based electrolytes for hybrid multivalent metals secondary batteries will be given. A detailed description of the interplay between structure and conductivity of ionic species will be presented. Finally, the relationships existing among metal ion speciation, long-range charge migration processes and electrochemical performances of these materials will be elucidated.

References:

[1] G. Pagot, F. Bertasi, K. Vezzù, E. Negro, S. Greenbaum and V. Di Noto, under submission.

[2] G. Pagot, F. Bertasi, K. Vezzù, F. Sepehr, X. Luo, G. Nawn, E. Negro, S.J. Paddison and V. Di Noto, Electrochim. Acta 2017, 246, 914-923.

[3] F. Bertasi, C. Hettige, F. Sepehr, X. Bogle, G. Pagot, K. Vezzù, E. Negro, S.J. Paddison, S.G. Greenbaum, M. Vittadello and V. Di Noto ChemSusChem 2015, 8, 3069-3076.

See more of: L02 - Electrode Processes 12 B
See more of: L02: Electrode Processes 12
See more of: Physical and Analytical Electrochemistry, Electrocatalysis, and Photoelectrochemistry
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