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. 22, 2026
Filed:
Apr. 12, 2022
Panasonic Intellectual Property Management Co., Ltd., Kadoma, JP;
Akihiro Taniguchi, Hyogo, JP;
Motohiro Sakata, Osaka, JP;
Kaoru Inoue, Osaka, JP;
Kensuke Nakura, Osaka, JP;
Abstract
A negative electrode for a secondary battery according to one aspect of the present disclosure is characterized by comprising a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and is characterized in that: the negative electrode mixture layer contains a negative electrode active material including a carbon material and a Si-based material; a pore diameter distribution of the negative electrode mixture layer as measured by a mercury press-in method has two peak values R1 and R2; the peak value R1 is in the range of 0.5-1.5 μm; the peak value R2 is in the range of 2-10 μm; an average particle diameter of the Si-based material is 4 μm or more; and the contained amount of the Si-based material with respect to the total amount of the negative electrode active material is 30 mass % or more.