The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 2024
Filed:
Nov. 27, 2019
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Kaori Ishikawa, Hyogo, JP;
Daisuke Ito, Hyogo, JP;
Yuta Matsuo, Hyogo, JP;
Mamoru Kuramoto, Hyogo, JP;
Abstract
A negative electrode having a negative electrode collector; and a negative-electrode mixed material layer that is formed atop the negative electrode collector. The negative-electrode mixed material layer includes: a first layer which contains a first carbon-based active material, a silicon-based active material, a polyacrylic acid, or a salt thereof, the first layer being formed atop the negative electrode collector; and a second layer having a tap density greater than that of the first carbon-based active material and a BET specific surface area smaller than that of the first carbon-based active material. The mass of the first layer is at least 50 mass % but less than 90 mass % with respect to the mass of the negative-electrode mixed material layer, and the mass of the second layer is greater than 10 mass % but no more than 50 mass % with respect to the mass of the negative-electrode mixed material layer.