Nanotube wiring

0351140 - ÚFCH JH 2011 CH eng P - Patent Document
Exnar, I. - Zakeeruddin, S. M. - Grätzel, M. - Kavan, Ladislav
Nanotube wiring.
Mnichov: European Patent Office, 2009. Owner: High Power Lithium SA. Date of the patent acceptance: 05.08.2009. Patent Number: EP2084774
Institutional research plan: CEZ:AV0Z40400503
Keywords : carbon nanotubes * lithium-ion battery
Subject RIV: CG - Electrochemistry

This invention concerns a novel method for surface derivatization of electrode materials for Li-ion batteries. The derivatization is based on adsorption of a composite assembly consisting of amphiphilic redox active molecule attached to single walled carbon nanotube (SWCNT). Its role consists in the enhancement of electronic conductivity of electrode materials, such as phosphate olivines, without requesting any significant increase of the electrode volume and mass. The SWCNT is linked to the redox molecule via non-covalent or covalent interaction with the hydrophobic part of the molecule or electrostatic interaction. The hydrophilic part of the molecule serves as the anchoring site for surface modification of the electrode active material. The redox potential of the molecule is close to the redox potential of the electrode active material. The adsorbed assembly of redox-molecule 0026# SWCNT thus improves the charge transfer from a current collector to the electrode active material.
Permanent Link: http://hdl.handle.net/11104/0190953