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Issue 11, 2013

A new room temperature and solvent free carbon coating procedure for battery electrode materials

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Abstract

Carbon coating on battery electrode active material powders is a common practice in order to improve their electronic conductivity and the battery calendar life by limiting side reactions (i.e. active material surface degradation and electrolyte decomposition). Such a coating is currently achieved through chemical procedures involving dispersing the powder in a liquid medium with a carbon precursor followed by thermolysis at high temperatures (ca. 700 °C). This energy consuming procedure has the drawback of not being applicable to materials which may decompose or reduce under such conditions. We present herein an alternative procedure based on physical deposition of carbon, carried out at room temperature under dry conditions, hence avoiding the limitations mentioned above and being generally applicable to any electrode active material. Moreover it allows easy achievement of a homogeneous conformal coating with fine control of the coating thickness. Results on selected materials are reported to exemplify the wide application spectrum and performance improvements induced by the coating.

Graphical abstract: A new room temperature and solvent free carbon coating procedure for battery electrode materials

Article information


Submitted
12 Apr 2013
Accepted
09 Sep 2013
First published
10 Sep 2013

Energy Environ. Sci., 2013,6, 3363-3371
Article type
Paper

A new room temperature and solvent free carbon coating procedure for battery electrode materials

A. Ponrouch, A. R. Goñi, M. T. Sougrati, M. Ati, J. Tarascon, J. Nava-Avendaño and M. R. Palacín, Energy Environ. Sci., 2013, 6, 3363 DOI: 10.1039/C3EE41243A

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