Method for manufacturing an electrode for a lithium-sulfur battery having a large active surface area

摘要

The invention relates to a method for preparing a positive electrode for a lithium-sulfur battery, comprising the following steps:a) a step of preparing a first mixture by placing a carbon additive such as carbon black and/or activated carbon, a carbon additive chosen from carbon nanotubes, carbon fibres and the mixtures of the two, a carbon organic binder, and a solvent in contact;b) a step of carbonising said mixture, by means of which the result is a powder comprising agglomerates of carbon black and/or activated carbon and of carbon nanotubes and/or carbon fibres;c) a step of placing the powder obtained in b) in contact with sulfur thus forming a second mixture;d) a step of dispersing said second mixture in an organic binder;e) a step of depositing the dispersion thus obtained on a substrate; andf) a step of drying said dispersion thus deposited.