Patent ID: 11909033
Assignee: PANASONIC ENERGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A negative electrode for nonaqueous electrolyte secondary battery comprising a negative electrode collector and a negative electrode mix layer disposed on the negative electrode collector,
wherein the negative electrode mix layer includes a first layer and a second layer disposed successively from the negative electrode collector,
the first layer contains a first carbon-based active material having a 10% compressive strength of 3 MPa or less, and the first layer further contains a silicon-based active material containing Si, and
the second layer contains a second carbon-based active material having a 10% compressive strength of 5 MPa or more, and the second layer has a lower content of the silicon-based active material than the first layer,
wherein the first carbon-based active material constitutes a sole carbon-based active material in the first layer, and the second carbon-based active material constitutes a sole carbon-based active material in the second layer.