POSITIVE ELECTRODES FOR LITHIUM-SULPHUR BATTERIES

摘要

The present invention pertains to an electrode-forming composition [composition (C)] comprising: (a) an aqueous latex comprising at least one fluoropolymer [polymer (F)] comprising recurring units derived from vinylidene fluoride (VDF), at least one hydrogenated monomer [monomer (H)] and, optionally, at least one other fluorinated monomer [monomer (F)] different from VDF, and, homogeneously dispersed therein, (b) at least one powdery electrode-forming material consisting of Sulphur [material (E)], (c) at least one powdery electrically conducting material [material (C)], (d) optionally, at least one surfactant [surfactant (S)], (e) optionally, at least one binding agent [agent (B)], and (f) optionally, less than 10% by weight, based on the total weight of the composition (C), of at least one organic solvent [solvent (S)], wherein the polymer (F) in the aqueous latex is under the form of primary particles having an average primary particle size of less than 1 μm, as measured according to ISO 13321. The present invention also pertains to a process for the manufacture of said composition (C) and to use of said composition (C) in a process for the manufacture of a positive electrode for a Lithium-Sulphur battery.

主权项

1. An electrode-forming composition (C) comprising:
(a) an aqueous latex comprising at least one fluoropolymer [polymer (F)] comprising recurring units derived from vinylidene fluoride (VDF), at least one hydrogenated monomer (H) and, optionally, at least one other fluorinated monomer (F) different from VDF, and, homogeneously dispersed therein, (b) at least one powdery electrode-forming material consisting of Sulphur [material (E)], (c) at least one powdery electrically conducting material (C), (d) optionally, at least one surfactant, (e) optionally, at least one binding agent, and (f) optionally, less than 10% by weight, based on the total weight of composition (C), of at least one organic solvent, wherein polymer (F) in the aqueous latex is in the form of primary particles having an average primary particle size of less than 1 μm, as measured according to ISO 13321.