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

Claim 0:
1. A negative electrode active material for a non-aqueous electrolyte secondary battery, containing negative electrode active material particles, wherein
the negative electrode active material particles comprise silicon compound particles each containing a silicon compound represented by SiOx where 0.5≤x≤1.6,
the silicon compound particle also contains at least one or more of Li2SiO3 and Li2Si2O5,
the negative electrode active material comprises a phosphate,
the negative electrode active material particles each have a surface containing lithium element,
a ratio mp/ml satisfies 0.07≤mp/ml≤0.8, where ml represents a molar quantity of the lithium element present on the 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
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.