Investigation of ionic liquids as electrolytes for carbon nanotube electrodes

The use of ionic liquids (IL) as electrolytes for electrochemical applications involving carbon nanotube (CNT) electrodes has been investigated in a brief initial study. The use of IL electrolytes in conjunction with CNT electrodes has proved possible and advantageous. Ionic liquids provide relatively high conductivity, wide potential window (up to 5.5 V) along with chemical stability and nonvolatile nature. While some decrease in the electrode capacitance and charging rate are observed in IL with respect to conventional electrolytes, the magnitude of the decrease is not substantial. The general well defined electrochemical behaviour of CNT electrodes in IL, coupled to the wide potential window and other advantages of these electrolytes, suggest new avenues for the design of capacitors, batteries and electromechanical actuators.

[1]  Jun Li,et al.  Novel Three-Dimensional Electrodes: Electrochemical Properties of Carbon Nanotube Ensembles , 2002 .

[2]  R. Hoch,et al.  High power electrochemical capacitors based on carbon nanotube electrodes , 1997 .

[3]  J. Goldman,et al.  Electrochemical properties of imidazolium salt electrolytes for electrochemical capacitor applications , 1999 .

[4]  Pulickel M. Ajayan,et al.  Carbon nanotube electrode for oxidation of dopamine , 1996 .

[5]  M. Hahn,et al.  Electronic properties and double layer of activated carbon , 1997 .

[6]  A. Rinzler,et al.  Carbon nanotube actuators , 1999, Science.

[7]  M. Hahn,et al.  The double layer of activated carbon electrodes part 2. Charge carriers in the solid material , 1994 .

[8]  Hardcover,et al.  Carbon: Electrochemical and Physicochemical Properties , 1988 .

[9]  Ray H. Baughman,et al.  Electrochemical studies of single-wall carbon nanotubes in aqueous solutions , 2000 .

[10]  D. Macfarlane,et al.  Room-temperature molten salts based on the quaternary ammonium ion , 1998 .

[11]  Zhennan Gu,et al.  Direct electrochemistry of cytochrome c at a glassy carbon electrode modified with single-wall carbon nanotubes. , 2002, Analytical chemistry.

[12]  H. Gerischer,et al.  Density of the electronic states of graphite: derivation from differential capacitance measurements , 1987 .

[13]  Ray H. Baughman,et al.  Electrochemical Characterization of Single‐Walled Carbon Nanotube Electrodes , 2000 .

[14]  Ernest Yeager,et al.  Differential Capacitance Study on the Basal Plane of Stress-Annealed Pyrolytic Graphite , 1972 .

[15]  Yasuhiko Ito,et al.  Room temperature ionic liquids of alkylimidazolium cations and fluoroanions , 2000 .

[16]  H. Pettersson,et al.  The Performance and Stability of Ambient Temperature Molten Salts for Solar Cell Applications , 1996 .

[17]  Richard M. Crooks,et al.  Electrochemistry Using Single Carbon Nanotubes , 1999 .

[18]  Seong Chu Lim,et al.  Supercapacitors Using Single‐Walled Carbon Nanotube Electrodes , 2001 .

[19]  Z. Gu,et al.  Investigation of the electrochemical and electrocatalytic behavior of single-wall carbon nanotube film on a glassy carbon electrode. , 2001, Analytical chemistry.

[20]  C. R. Martin,et al.  Carbon nanotubule membranes for electrochemical energy storage and production , 1998, Nature.