Physical Properties of Pyridinium Fluorohydrogenate, [pyridine · H+][H2F3]

Ionic liquids (ILs), also referred to as molten salts, have found application as electrolytes for batteries and super-capacitors, in electroplating baths, as designer solvents, and as reaction media. A few of the desired properties of a super-capacitor electrolyte are nonflammability, thermal stabil...

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Veröffentlicht in:International journal of thermophysics 2008-12, Vol.29 (6), p.1939-1944
Hauptverfasser: Hulse, Ryan, Singh, Rajiv
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container_issue 6
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container_title International journal of thermophysics
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creator Hulse, Ryan
Singh, Rajiv
description Ionic liquids (ILs), also referred to as molten salts, have found application as electrolytes for batteries and super-capacitors, in electroplating baths, as designer solvents, and as reaction media. A few of the desired properties of a super-capacitor electrolyte are nonflammability, thermal stability, and electrochemical stability. ILs containing aromatic cations have been shown to have low viscosity which results in a high electrochemical conductivity. There is a delicate balance between increasing the thermal stability, or decreasing the melting point, and increasing the electrochemical conductivity of the IL. This study focuses on pyridinium fluorohydrogenate, [pyridine · H + ][H 2 F 3 ] − . Pyridinium fluorohydrogenate has been synthesized by the reaction of pyridine and anhydrous hydrofluoric acid. This IL has a relatively high electrical conductivity (~98 mS · cm −1 at 23 °C), a wide electrochemical window, and a boiling point of 186 °C. A stable gel can also be formed by combining [pyridine · H + ][H 2 F 3 ] − and a super absorbent polymer such as polyacrylic acid. The gel adds mechanical stability to the matrix while not greatly affecting the conductivity of the IL.
doi_str_mv 10.1007/s10765-008-0508-8
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subjects Classical Mechanics
Condensed Matter Physics
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Physical Chemistry
Physics
Physics and Astronomy
title Physical Properties of Pyridinium Fluorohydrogenate, [pyridine · H+][H2F3]
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