Coating composition for coating particles, positive electrode, negative electrode, all-solid-state battery, and sulfide-based all-solid-state battery

摘要

Provided are sulfide-based particles which not only hardly generate hydrogen sulfide when exposed to the atmosphere but also have excellent ionic conductivity and dispersibility in a solvent. The surface of the sulfide-based particles is coated particles coated with a fluorine-containing polymer, and the fluorine-containing polymer is the formula (1) (in the formula, X is a hydrogen atom or the like, Y is a direct bond or the like. Rf is a structural unit (1) based on the monomer (1) represented by a linear or branched fluoroalkyl group having 1 to 10 carbon atoms, and the formula (2) (in the formula). , R1 is a hydrogen atom or the like, and R2 is a sulfur having 1 or more carbon atoms which may contain at least one atom selected from the group consisting of an oxygen atom, a nitrogen atom and a sulfur atom in the structure. It is a hydrogen group. However, when R1 is H or CH3, R2 has 3 carbon atoms containing at least one atom selected from the group consisting of an oxygen atom, a nitrogen atom, and a sulfur atom in the structure. A structural unit (2) based on at least one selected from the group consisting of a monomer (2) represented by the above-mentioned hydrocarbon group or a hydrocarbon group having 6 or more carbon atoms having a ring structure) and the like. It is a coating particle characterized by containing and. [Chemical 1] [Chemical 2]