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.

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.

A method for preparing a carbon nanostructure including molybdenum disulfide is discussed. More particularly, a method is discussed for preparing a carbon nanostructure in which molybdenum disulfide is located on the surface by melt diffusion and heat treatment of a mixture of a molybdenum precursor, a carbon nanostructure, and sulfur. Also, a positive electrode of a lithium secondary battery including a carbon nanostructure including molybdenum disulfide as an additive, and a lithium secondary battery including the same. In the case of the lithium secondary battery including the positive electrode to which the carbon nanostructure including molybdenum disulfide was applied, the carbon nanostructure including the molybdenum disulfide adsorbs lithium polysulfide (LiPS) generated during the charging/discharging process of the lithium secondary battery, thereby increasing the charging/discharging efficiency of the battery and improving lifetime characteristics.

A method for preparing a carbon nanostructure including molybdenum disulfide is discussed. More particularly, a method is discussed for preparing a carbon nanostructure in which molybdenum disulfide is located on the surface by melt diffusion and heat treatment of a mixture of a molybdenum precursor, a carbon nanostructure, and sulfur. Also, a positive electrode of a lithium secondary battery including a carbon nanostructure including molybdenum disulfide as an additive, and a lithium secondary battery including the same. In the case of the lithium secondary battery including the positive electrode to which the carbon nanostructure including molybdenum disulfide was applied, the carbon nanostructure including the molybdenum disulfide adsorbs lithium polysulfide (LiPS) generated during the charging/discharging process of the lithium secondary battery, thereby increasing the charging/discharging efficiency of the battery and improving lifetime characteristics.

A positive electrode material for a secondary battery, includes: a composition represented by Li.sub.4+xFe.sub.4+y(P.sub.2O.sub.7).sub.3 (0.80x0.60, 0.30y0.40, and 0.30x+y0.30); and tungsten, wherein the positive electrode material has a triclinic crystal structure.

A positive electrode material for a secondary battery, includes: a composition represented by Li.sub.4+xFe.sub.4+y(P.sub.2O.sub.7).sub.3 (0.80x0.60, 0.30y0.40, and 0.30x+y0.30); and tungsten, wherein the positive electrode material has a triclinic crystal structure.

A positive electrode active material for a lithium secondary battery including a carbon material impregnated with catalyst particles, and a sulfur-carbon composite, a preparation method thereof, and a positive electrode for a lithium secondary battery, and the lithium secondary battery including the same.

A positive electrode active material for a lithium secondary battery including a carbon material impregnated with catalyst particles, and a sulfur-carbon composite, a preparation method thereof, and a positive electrode for a lithium secondary battery, and the lithium secondary battery including the same.

This application provides a positive-electrode plate, including a current collector, and a first active substance layer and a second active substance layer that are sequentially disposed on a surface of the current collector. The first active substance layer includes a first positive-electrode active material, and the first positive-electrode active material includes at least one of a compound represented by Formula (I) Li.sub.1+x1Mn.sub.a1M.sub.1-a1O.sub.2-y1A.sub.y1 or a compound represented by Formula (II) Li.sub.1+x2Mn.sub.a2N.sub.2-a2O.sub.4-y2B.sub.y2. The second active substance layer includes a second positive-electrode active material having a pH value of from 1012. In this application, the active substance layer that includes high-pH positive-electrode active material is disposed outside the active substance layer that includes a lithium manganese-based positive-electrode active material, so as to make a layered electrode plate.

A process for preparing a cathode of a lithium battery, having the following steps: (a) Longitudinally punching a metal band to form irregular filamentous holes, horizontally stretching the metal band, and performing compaction to give the metal net irregular filamentous holes; (b) After the metal net is cleaned and dried, processing the metal net surface by a laser less than 5 W, of 500-1000 W, and of 10-100 W sequentially; and (c) Coating the metal net, having the surface processed with lasers, with a prepared cathode paste, and drying, pressing, and cutting the metal net to obtain a battery cathode.