Patent ID: 11961997
Assignee: SHIN-ETSU CHEMICAL CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 10:
11. A method for producing a negative electrode active material containing negative electrode active material particles including silicon compound particles, the method comprising steps of:
preparing silicon compound particles each containing a silicon compound represented by SiOx where 0.5≤x≤1.6;
inserting Li into the silicon compound particles to incorporate at least one or more of Li2SiO3 and Li2Si2O5; and
blending the negative electrode active material particles with a phosphate to produce a negative electrode active material satisfying a ratio mp/ml of 0.07≤mp/ml≤0.8, where ml represents a molar quantity of lithium element present on surfaces of the negative electrode active material particles per unit mass of the negative electrode active material particles, and mp represents a molar quantity of phosphorus element contained per unit mass of the negative electrode active material particles, and
wherein the negative electrode active material particles cause a dispersion containing 10 mass % of the negative electrode active material particles dispersed in pure water to have a pH value of 10 or more and 12.5 or less.