Journal of Applied Electrochemistry

, Volume 35, Issue 2, pp 169–176

Substrate-induced coagulation (SIC) of nano-disperse carbon black in non-aqueous media: a method of manufacturing highly conductive cathode materials for Li-ion batteries by self-assembly

  • Angelika Basch
  • Bernhard Gollas
  • Roger Horn
  • Jürgen O. Besenhard
Article

Abstract

Substrate-induced coagulation (SIC) is a coating process based on self-assembly for coating different surfaces with fine particulate materials. The particles are dispersed in a suitable solvent and the stability of the dispersion is adjusted by additives. When a surface, pre-treated with a flocculant e.g. a polyelectrolyte, is dipped into the dispersion, it induces coagulation resulting in the deposition of the particles on the surface. A non-aqueous SIC process for carbon coating is presented, which can be performed in polar, aprotic solvents such as N-Methyl-2-pyrrolidinone (NMP). Polyvinylalcohol (PVA) is used to condition the surface of substrates such as mica, copper-foil, silicon-wafers and lithiumcobalt oxide powder, a cathode material used for Li-ion batteries. The subsequent SIC carbon coating produces uniform layers on the substrates and causes the conductivity of lithiumcobalt oxide to increase drastically, while retaining a high percentage of active battery material.

Keywords

carbon coating composite electrode dip-coating Li-ion battery non-aqueous dispersion substrate-induced coagulation (SIC) 

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Copyright information

© Springer 2005

Authors and Affiliations

  • Angelika Basch
    • 1
    • 2
  • Bernhard Gollas
    • 1
  • Roger Horn
    • 2
  • Jürgen O. Besenhard
    • 1
  1. 1.Institute for Chemical Technology of Inorganic MaterialsGraz University of TechnologyGrazAustria
  2. 2.Ian Wark Research InstituteUniversity of South AustraliaMawson LakesAustralia

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