Abstract: 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; and f) a step of drying said dispersion thus deposited.

Abstract: A fuel cell including: a membrane/electrode assembly including a proton exchange membrane and including an anode in contact with the membrane, the membrane/electrode assembly including a first active zone covered by the anode, and a first linking zone not covered by the anode; flow guiding plates between which the membrane/electrode assembly is arranged, the flow guiding plates being traversed by at least one first flow collector in communication with the anode, the first linking zone arranged between the first flow collector and the first active zone. The membrane/electrode assembly further includes a first capacitive layer including a mixture of carbon including a BET specific surface area at least equal to 200 m2/g and of a proton-conducting material, arranged on the first linking zone.

Abstract: The invention relates to a method for the preparation of a positive electrode for a lithium-sulphur battery and which comprises the following steps: a step for impregnation, of a non-woven material made of carbon fibres with a porosity of at least 90% and a mass per unit surface area of at least 10 g/m2, with a first composition comprising at least one electrically-conductive inorganic carbon-containing additive, at least one polymer binder and at least one solvent; a step for drying the non-woven material thus impregnated; a step for bringing the non-woven material into contact with a second composition comprising a sulphur-containing active material.

Abstract: A fuel cell including: a membrane/electrode assembly including a proton exchange membrane and including an anode in contact with the membrane, the membrane/electrode assembly including a first active zone covered by the anode, and a first linking zone not covered by the anode; flow guiding plates between which the membrane/electrode assembly is arranged, the flow guiding plates being traversed by at least one first flow collector in communication with the anode, the first linking zone arranged between the first flow collector and the first active zone. The membrane/electrode assembly further includes a first capacitive layer including a mixture of carbon including a BET specific surface area at least equal to 200 m2/g and of a proton-conducting material, arranged on the first linking zone.

Abstract: The invention relates to a fuel cell comprising a membrane/electrode assembly (14), that includes: a proton exchange membrane (2); an anode (31) which is in contact with a first surface of the membrane and which contains a mixture including a proton conducting polymer and platinum supported on carbon powder; said mixture further includes additional carbon which does not support any catalyst and which has a minimum specific surface area BET of 200 m2/g. The membrane/electrode assembly (14) has a first active region (21) that is covered by the anode (31), and a first joining region (22) that is not covered by the anode (31).

Abstract: A process for preparing a structure acting both as a positive electrode for a lithium-sulfur battery and as a current collector, comprising the following operations: depositing one or more liquid compositions comprising the constituent ingredients of this structure on a removable substrate; drying the one or more deposited compositions; separating the removable substrate from the structure thus obtained, which forms the structure acting both as a positive electrode for a lithium-sulfur battery and as a current collector.

Abstract: 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; and f) a step of drying said dispersion thus deposited.

Abstract: The invention relates to a method for the preparation of a positive electrode for a lithium-sulphur battery and which comprises the following steps: a step for impregnation, of a non-woven material made of carbon fibres with a porosity of at least 90% and a mass per unit surface area of at least 10 g/m2, with a first composition comprising at least one electrically-conductive inorganic carbon-containing additive, at least one polymer binder and at least one solvent; a step for drying the non-woven material thus impregnated; a step for bringing the non-woven material into contact with a second composition comprising a sulphur-containing active material.

Abstract: The invention relates to a preparation method for a porous positive electrode deposited on a substrate for a lithium-sulphur battery, and which comprises the following steps: a) a step for the deposition onto a substrate of at least one layer of a first composition comprising at least one electrically-conductive inorganic carbon-containing additive, at least one polymer binder and at least one pore-forming agent; b) a step for the removal of the pore-forming agent(s) by sintering of the deposited layer or layers; c) a step c) a step for bringing the layer or layers obtained in b) into contact with a second composition comprising a sulphur-containing active material.

Abstract: The present invention relates to an electrolyte solution comprising an electrolyte salt and an electrolyte solvent, wherein the electrolyte solvent comprises a fluorinated acyclic dialkyl carbonate, preferably an n-fluoro diethyl carbonate according to formula (1) as follows: C2H5-xFx—CO3C2H5-yFy (1) wherein 1?x?5 and 0?y?5; in an amount in the range of ?10 wt % to ?100 wt %, referring to a total amount of the electrolyte solvent of 100 wt %, and the use of such fluorinated acyclic dialkyl carbonates for the prevention or suppresion of aluminum current collector corrosion in an alkali or alkaline earth metal-based electrochemical energy storage device, particularly in a lithium-ion battery or lithium polymer battery containing an electrolyte solution comprising an alkali or alkaline earth metal sulfonimide or sulfonmethide salt.