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:
Dec. 08, 2015
Filed:
Feb. 01, 2012
Teruaki Tezuka, Kofu, JP;
Toshihiro Hayashi, Nirasaki, JP;
Nobuo Ando, Nakakoma-gun, JP;
Yuu Watanabe, Hokuto, JP;
Makoto Taguchi, Kai, JP;
Naoshi Yasuda, Komatsu, JP;
Teruaki Tezuka, Kofu, JP;
Toshihiro Hayashi, Nirasaki, JP;
Nobuo Ando, Nakakoma-gun, JP;
Yuu Watanabe, Hokuto, JP;
Makoto Taguchi, Kai, JP;
Naoshi Yasuda, Komatsu, JP;
JM Energy Corporation, Hokuto, JP;
Abstract
Provided is a lithium ion capacitor having a low internal resistance, a high energy density, and a high capacity retention rate. The lithium ion capacitor includes a positive electrode having a positive electrode active material layer formed on a roughened positive electrode current collector, a negative electrode having a negative electrode active material layer containing graphite-based particles formed on a negative electrode current collector, and an electrolytic solution containing a solution of a lithium salt in an aprotic organic solvent, wherein the total thickness of the positive electrode active material layer is 50 μm to 140 μm, and the ratio of mass of the positive electrode active material layer to the sum of the mass of the positive electrode active material layer and that of the negative electrode active material layer is 0.4 to 0.5.