Method for producing sulfide solid electrolyte particles
AssigneeToyota Jidosha Kabushiki Kaisha
InventorYusuke Kintsu
Life of this patent
Estimating the term…
Abstract
A method for efficiently producing sulfide solid electrolyte particles which are particles in spherical form and which have a small particle diameter. The method comprises: preparing a sulfide solid electrolyte material, grinding the sulfide solid electrolyte material by mechanical milling to obtain particles in flattened form (a first grinding step), and grinding the particles in flattened form by mechanical milling to obtain sulfide solid electrolyte particles in spherical form (a second grinding step), wherein a relationship A (J)>B (J) is satisfied, where A (J) is a kinetic energy (½(mv2)) per grinding medium used in the first grinding step, and B (J) is a kinetic energy (½(mv2)) per grinding medium used in the second grinding step.
Claims9
A method for producing sulfide solid electrolyte particles, the method comprising:
- preparing a sulfide solid electrolyte material,
- grinding the sulfide solid electrolyte material by mechanical milling, thereby obtaining particles in flattened form (a first grinding step), and
- grinding the particles in flattened form by mechanical milling, thereby obtaining sulfide solid electrolyte particles in spherical form (a second grinding step),
- wherein a relationship A (J)>B (J) is satisfied, where A (J) is a kinetic energy (½(mv2)) per grinding medium used in the first grinding step, and B (J) is a kinetic energy (½(mv2)) per grinding medium used in the second grinding step,
- wherein the kinetic energy A per grinding medium used in the first grinding step is in a range of from 3.0×10−7 (J) to 1.0×10−5 (J),
- wherein a value X of the particles in flattened form obtained by the following Formula (1) is 25 or more, and
- wherein a value X of the particles in spherical form is lower than the value X of the particles in flattened form,
- X=BET specific surface area(m2/g)×median diameter D50(μm)×density(g/cm3). Formula (1):
Dependencies are inferred from the claim text.