Investigation of the capacitance minimum of unannealed single-walled carbon nanotube papers in aqueous sodium chloride

Leonard S. Fifield; Larry Raymond Dalton; Geoffrey M. Spinks

doi:10.1117/12.456530

15 November 2002 Investigation of the Capacitance Minimum of Unannealed Single-walled Carbon Nanotube Papers in Aqueous Sodium Chloride

Leonard S. Fifield, Larry Raymond Dalton, Geoffrey M. Spinks

Author Affiliations +

Proceedings Volume 4807, Physical Chemistry of Interfaces and Nanomaterials; (2002) https://doi.org/10.1117/12.456530
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

The electrochemical properties of carbon nanotube (NT) assemblies are relevant for many potential nanotube applications including super-capacitors, batteries, fuel cells and actuators. In this work, the double-layer capacitance of a paper of single-walled carbon nanotubes is determined for a series of concentrations of NaCl in water. The dependence of capacitance on potential was also determined in an effort to locate the potential of zero charge (PZC) for each NaCl concentration. The double-layer capacitance of the NT paper is seen to increase with electrolyte concentration, while the PZC (capacitance minimum) is seen to depend more on the sequence of electrolyte concentration tested (sample history) than on the concentration of electrolyte itself.

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Leonard S. Fifield, Larry Raymond Dalton, and Geoffrey M. Spinks "Investigation of the Capacitance Minimum of Unannealed Single-walled Carbon Nanotube Papers in Aqueous Sodium Chloride", Proc. SPIE 4807, Physical Chemistry of Interfaces and Nanomaterials, (15 November 2002); https://doi.org/10.1117/12.456530

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