Patent ID: 11936034
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 2:
3. The negative electrode active material for a secondary battery according to claim 1, wherein
the element Mx includes element Mg in addition to said at least one of elements Y, Nb, V, La, and Ta, and
in the silicate phase, the element Na content is 9 mol % to 52 mol %, an element Mg content is 3 mol % to 12 mol %, a content of said at least one of elements Y, Nb, V, La, and Ta, is 3 mol % to 50 mol %, and the element Si content is 25 mol % or more, each based on the total amount other than oxygen.