The effect of carbon morphology on the LiCoO2 cathode of lithium ion batteries

Kwon, Nam Hee

doi:10.1016/j.solidstatesciences.2013.04.010

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Journal article

The effect of carbon morphology on the LiCoO2 cathode of lithium ion batteries

Kwon, Nam Hee University of Fribourg, Department of Chemistry, Switzerland

2013

Published in:

Solid State Sciences. - 2013, vol. 21, p. 59–65

English Conductive carbon coatings on cathode materials play a critical role in the electrochemical performance of lithium ion batteries due to the increased electronic conductivity and the protective effect of the organic electrolyte on the cathode material. The composite structure of a cathode depends on the physicochemical properties of the carbonaceous materials. We investigated several types of carbonaceous materials in LiCoO₂ electrodes. Platelet-shaped graphite provided superior cyclic voltammograms and specific capacities of the LiCoO₂ electrodes compared to nanosized spherical carbon black. The platelet-shaped graphite mixed homogeneously with LiCoO₂ and coated on LiCoO₂ particles in the form of a thin layer via the ball-milling method. However, the nano-carbon black is dense and aggregates during the ball-milling process. The thick coating of nano-carbon black on the LiCoO₂ particles, which were observed in backscattered electron images collected during the SEM measurements, made the penetration of the liquid electrolyte through this thick carbon layer difficult.

Faculty

Faculté des sciences et de médecine

Department

Département de Chimie

Language