Abstract: The invention concerns a process for electrochemically producing a carbonaceous material with its surface modified by organic groups, in particular functionalized organic groups. The process comprises providing a solution, in a protic or aprotic solvent, comprising a salt of a carboxylate of an organic residue capable of undergoing a Kolbe reaction. The solution is then put in contact with a carbonaceous material, wherein the carbonaceous material is positively polarized with respect to a cathode that is also in contact with the solution. The solution may optionally contain an electrolyte. The invention also concerns carbonaceous materials modified at the surface with arylmethyl groups and the use of these modified materials, for example, in the production of composite materials.
September 3, 1999
Date of Patent:
April 17, 2001
Centre National de la Recherche Scientifique
Claude Andrieux, Felipe Gonzalez, Jean Pinson, Jean-Michel Saveant
Abstract: A composition for forming an electrolyte for a solid electrolytic capacitor having excellent electric properties (capacitance, equivalent series resistance, dielectric loss, impedance, etc.) in a frequency zone ranging from a low frequency to a high frequency, and is capable of easily forming a high yield of the solid electrolytic capacitor having an excellent resistance to stress in the steps and a high thermal resistance, and a solid electrolytic capacitor produced from the electrolyte. The composition comprises (A) an aniline compound, (B) an organic sulfonic acid, (C) water, (D) an organic solvent, and if necessary, (E) a specified compound.