Method for preparing carbon coated electrode active material particles

Abstract

[EN] The present invention is related to a method for preparing particles having a core made of an electrode active material, and a carbon coating Said method is based on a physical deposition of carbon, wherein the particles to be coated remain under dry conditions at a temperature lower than their decomposition temperature, during the whole process, hence avoiding all the drawbacks mentioned above and being generally applicable to all electrode active materials. Said method comprises the steps of: providing active material particles; coating said particles with a carbon film by a thermal vapor deposition (TVD) method using carbon as the carbon source; wherein the particles remain at a temperature lower than their decomposition temperature and under mechanical agitation during the coating process