Electrochemical NanoScience Group
‹— Electrochemical Double Layer | ‹— Research topics

Electrolyte: aqueous and non-aqueous systems (structure)

An electrolyte is a substance containing free ions that behaves as an electrically conductive medium. Because they generally consist of ions in solution, electrolytes are also known as ionic solutions, but molten electrolytes (ionic liquids) and solid electrolytes are also possible.

Suitable non-aqueous solvents include acetonitrile, DMF, DMSO, THF, methylene chloride, and propylene carbonate. Salts for non-aqueous electrolyte solutions typically consist of a large cation (e.g., tetraalkylammonium cations), and large anions (e.g., hexafluorophosphate, tetrafluoroborate, and perchlorate) to ensure full dissociation.

An ionic liquid is a salt in which the ions are poorly coordinated, which results in these solvents being liquid below 100°C, or even at room temperature (room temperature ionic liquids, RTIL's). At least one ion has a delocalized charge and one component is organic, which prevents the formation of a stable crystal lattice. The methylimidazolium and pyridinium ions have proven to be good starting points for the development of ionic liquids.
Small cell Ionic liquid
1-butyl-3-methylimidazolium salt
Revised: 07.12.2007     ©: 2005-2007