Cathode for a cell of a lithium-ion battery, its manufacturing process and the battery incorporating it

摘要

The invention relates to a cathode that is usable in a cell of a lithium-ion battery comprising an electrolyte based on a lithium salt and on a non-aqueous solvent, to a process for manufacturing this cathode and to a lithium-ion battery having one or more cells incorporating this cathode. This cathode is based on a polymer composition, obtained by melt processing and without solvent evaporation, that is the product of a hot compounding reaction between an active material and additives including a polymer binder and an electrically conductive filler. According to the invention, the binder is based on at least one crosslinked elastomer and the additives furthermore comprise at least one non-volatile organic compound usable in the electrolyte solvent, the composition advantageously includes the active material in a mass fraction greater than or equal to 90%.

主权项

1. Cathode usable in a cell of a lithium-ion battery comprising an electrolyte based on a lithium salt and on a non-aqueous electrolyte solvent, the cathode being based on a polymer composition, obtained by melt processing and without solvent evaporation, that is the product of a hot compounding reaction between an active material and additives comprising a polymer binder and an electrically conductive filler, wherein said binder is based on at least one crosslinked elastomer and in that said additives furthermore comprise at least one non-volatile organic compound, which is defined by having a boiling point above 150° C. at an atmospheric pressure of 1.013×105 Pa, usable in said electrolyte solvent, the composition comprising said active material in a mass fraction greater than or equal to 90%.