Patent ID: 11862787
Assignee: DAIDO STEEL 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 lithium-ion battery, comprising a Si phase, a Si—Zr compound phase, and a Sn—X compound phase wherein the X is at least one element selected from the group consisting of Cu, Ti, Co, Fe, Ni, and Zr,
wherein the Sn—X compound phase has a proportion of 0.1 mass % to 18 mass % to a whole,
wherein the Si phase has a proportion of 10 mass % to 80 mass % to the whole, wherein the Si—Zr compound phase of an island form and the Sn—X compound phase are dispersed in the Si phase of a sea form,
wherein the Si phase is a matrix phase, and
wherein the Si—Zr compound phase comprises Si2Zr having a melting point higher than that of Si.