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Russian Journal of Electrochemistry

, Volume 54, Issue 11, pp 970–978 | Cite as

Computer Simulation of an Electrode of Lithium-Ion Battery: Estimation of Ohmic Losses for Active-Material Grains Covered by a Conducting Film

  • Yu. G. Chirkov
  • V. I. Rostokin
  • A. M. SkundinEmail author
  • T. L. Kulova
Article
  • 2 Downloads

Abstract

The use of active materials with high resistivity in lithium-ion batteries necessitates covering the surface of active particles with electron-conducting films. If this measure is insufficient, then carbon black is added to the electrode active layer. The ohmic losses are assessed by computer simulation of electrode’s active layers with active grains covered by a carbon film. Electrode’s active layer is modeled as a set of equal-sized cubic grains of the active material (covered with a conducting film) and the electrolyte; the grains are randomly distributed throughout the active layer. It is shown how the effective conductivity of the active layer decreases in this case. Furthermore, account is taken of the fact that carbon films represent a set of islets, which results in an additional decrease in the effective conductivity of the active layer. By computer simulations in combination with the percolation theory, it is found how the addition of carbon black can increase the conductivity of electrode’s active layer.

Keywords

lithium-ion battery ohmic losses porous electrodes computer simulations electron-conducting coatings 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • Yu. G. Chirkov
    • 1
  • V. I. Rostokin
    • 2
  • A. M. Skundin
    • 1
    Email author
  • T. L. Kulova
    • 1
  1. 1.Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of SciencesMoscowRussia
  2. 2.National Research Nuclear University—Moscow Engineering Physics InstituteMoscowRussia

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