2. A method for producing a precursor of an oxide-based positive electrode active material for all-solid-state lithium ion batteries, the precursor having a compositional formula represented by:a composite hydroxide NixCoyMn1-x-y(OH)2, with 0.8 ≤ x ≤ 1.0; and 0 ≤ y ≤ 0.20,the precursor having an average particle diameter D50 of from 1.0 to 5.0 µm and a circularity of from 0.85 to 0.95,wherein the method comprises a step of performing a crystallization reaction using an aqueous solution containing basic aqueous solutions of a nickel salt, a cobalt salt, a manganese salt, an aqueous ammonia and an alkali metal as a reaction solution while controlling a pH of the reaction solution to a range of from 10.5 to 11.5, and an ammonium ion concentration to a range of from 5 to 25 g/L and a temperature of the reaction solution to a range of from 50 to 65 °C.
a composite hydroxide NixCoyMn1-x-y(OH)2, with 0.8 ≤ x ≤ 1.0; and 0 ≤ y ≤ 0.20,
the precursor having an average particle diameter D50 of from 1.0 to 5.0 µm and a circularity of from 0.85 to 0.95,
wherein the method comprises a step of performing a crystallization reaction using an aqueous solution containing basic aqueous solutions of a nickel salt, a cobalt salt, a manganese salt, an aqueous ammonia and an alkali metal as a reaction solution while controlling a pH of the reaction solution to a range of from 10.5 to 11.5, and an ammonium ion concentration to a range of from 5 to 25 g/L and a temperature of the reaction solution to a range of from 50 to 65 °C.
precursor
average particle diameter D50
from 1.0 to 5.0 µm
µm
a crystallization reaction
pH
from 10.5 to 11.5
a crystallization reaction
ammonium ion concentration
from 5 to 25 g/L
g/L
a crystallization reaction
temperature of the reaction
50 to 65 °C
°C
precursor
average particle diameter D50
from 1.0 to 5.0 µm
µm
a crystallization reaction
pH
from 10.5 to 11.5
a crystallization reaction
ammonium ion concentration
from 5 to 25 g/L
g/L
a crystallization reaction
temperature of the reaction
50 to 65 °C
°C