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:
Feb. 21, 2017
Filed:
Sep. 05, 2013
Fujifilm Corporation, Minato-ku, Tokyo, JP;
Yusuke Hatanaka, Haibara-gun, JP;
Satoshi Hoshi, Ashigara-kami-gun, JP;
FUJIFILM Corporation, Tokyo, JP;
Abstract
The purpose of this invention is to provide an aluminum base for a current collector, which enables the production of a secondary battery having excellent cycle properties; and a current collector, a positive electrode, a negative electrode and a secondary battery, each of which is produced using the aluminum base. The aluminum base for a current collector has a surface in which at least two structures selected from the group consisting of a large-wave structure having an average opening size of more than 5 μm but up to 100 μm, a medium-wave structure having an average opening size of more than 0.5 μm but up to 5 μm, and a small-wave structure having an average opening size of more than 0.01 μm but up to 0.5 μm are superimposed on one another, wherein a maximum peak-to-valley height Pt of a profile curve of the surface is up to 10 μm.