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Updated: Mar 15, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature
Published on: December 20, 2016
Simple access to ionic liquids and organic salts containing the phosphaethynolate (PCO(-)) and Zintl (Sb11(3-))
Maximilian Jost1, Lars H Finger, Jörg Sundermeyer
1Fachbereich Chemie and Wissenschaftliches Zentrum für Materialwissenschaften, Philipps-Universität Marburg, Hans-Meerwein-Straße 4, 35032 Marburg, Germany. haenisch@chemie.uni-marburg.de jsu@staff.uni-marburg.de.
Abstract:
Herein we report the synthesis of the first ionic liquids with the highly reactive and synthetically valuable phosphaethynolate (PCO(-)) anion. They are simply synthesised by the reaction of organic methylcarbonate salts with P(SiMe3)3. The products are obtained in near to quantitative yields and they are highly viscous liquids at room temperature or have low melting points for symmetric cations. Moreover, extending this synthetic strategy towards Sb(SiMe3)3 we discovered a simple synthesis for [P(nBu)3Me](+)3[Sb11](3-), the first organic cation salt comprising the Zintl-anion [Sb11](3-).
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