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:
Mar. 24, 2015
Filed:
Dec. 26, 2007
Shuji Ito, Nara, JP;
Yasutaka Kogetsu, Osaka, JP;
Kazuya Iwamoto, Osaka, JP;
Kazuyoshi Honda, Osaka, JP;
Taisuke Yamamoto, Nara, JP;
Yasuhiro Ueyama, Hyogo, JP;
Keisuke Ohara, Osaka, JP;
Hitoshi Katayama, Osaka, JP;
Shuji Ito, Nara, JP;
Yasutaka Kogetsu, Osaka, JP;
Kazuya Iwamoto, Osaka, JP;
Kazuyoshi Honda, Osaka, JP;
Taisuke Yamamoto, Nara, JP;
Yasuhiro Ueyama, Hyogo, JP;
Keisuke Ohara, Osaka, JP;
Hitoshi Katayama, Osaka, JP;
Abstract
The present invention relates to a current collector including a base portion with a flat face, primary projections projecting from the flat face, and secondary projections projecting from the top of the primary projections. The present invention also relates to a current collector including a base portion with a flat face and primary projections projecting from the flat face, wherein the roughening rate of the top of the primary projections is 3 to 20. By using such a current collector, separation of the active material from the current collector can be inhibited when using an active material that has a high capacity but undergoes a large expansion at the time of lithium ion absorption.