Michel Armand (CIC energiGUNE), Heng Zhang (CIC energiGUNE), Maria Martinez-Ibañez (CIC energiGUNE), Lorena García (CIC energiGUNE), Eduardo Sanchez (CIC energiGUNE)
The authors of the present invention have developed a less wasteful, step-economical and facile method to prepare ionic compounds with a sulfonimide core which not only display a high delocalization of the anionic charge and improved dissociation ability but can be also comprised in solid-state electrolyte to improve the total ionic conductivity.
The new method to prepare ionic compounds of formula I is performed in one-pot and displays several advantages compared to prior art, among these: higher step-and atom-economy, milder conditions, as well as the ability to synthesize a broad range of salts having high negative charge delocalization.
The anion of salt I involves an S-N-S-N-S core where sulfur atoms are hexavalent and the negative charge is delocalized between the two nitrogen atoms and the five oxygen atoms linked to the sulfur atoms; and, specifically, a group (E) and two groups R1 and R2 are directly attached to the S-N-S-N-S core. This highly delocalized anion structure can be combined with different cations to generate salts which properties are governed by the anion properties. The invention of this innovative route gives access to a variety of delocalized anions with tuned properties. Those salts are of interest for multiple applications. It has been found that they lead to improved solid electrolytes as compared to non-delocalized salts.
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Anna Llordés Gil (CIC energiGUNE), Frédéric Aguesse (CIC energiGUNE), Antonio Gutiérrez Pardo (CIC energiGUNE), Jakub Zagorski (CIC energiGUNE), Francisco José Fernández Carretero (Fundación Tecnalia Research & Innovation), Amal Siriwardana (Fundación Tecnalia Research & Innovation), Alberto García Luis (Fundación Tecnalia Research & Innovation) and Haizea Villaverde Cendoya (Fundación Tecnalia Research & Innovation)
Laida Otaegui (CIC energiGUNE), Aitor Villaverde (CIC energiGUNE), Amaia Quintela (CIC energiGUNE), Maria Carmen Morant-Miñana (CIC energiGUNE), Lucienne Buannic (CIC energiGUNE), Ian Paul Gilbert (Ormazabal Corporate Technology)