Patent ID: 11916237
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, and an electrolyte,
the negative electrode including a negative electrode active material capable of electrochemically absorbing and releasing lithium, and a binder;
the negative electrode active material including a Si-containing material and a carbon material;
the Si-containing material includes a composite material including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase;
a ratio of the carbon material to a total of the Si-containing material and the carbon material is 70 mass % or more and 98 mass % or less;
the silicon particles dispersed in the lithium silicate phase have a crystallite size of 10 nm or more;
the binder including at least one cellulose compound selected from the group consisting of a carboxyalkyl cellulose and a salt thereof;
the electrolyte including a non-aqueous solvent, and a lithium salt dissolved in the non-aqueous solvent;
the lithium salt including lithium bis(fluorosulfonyl)imide: LFSI.