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:
Jun. 07, 2005
Filed:
Sep. 04, 2002
Michitaka Hidaka, Nagoya, JP;
Kazuhito Furuta, Kasugai, JP;
Masaki Shimizu, Kakamigahara, JP;
Akiyasu Okuno, Suginami-ku, JP;
Hideki Rachi, Kawasaki, JP;
Michitaka Hidaka, Nagoya, JP;
Kazuhito Furuta, Kasugai, JP;
Masaki Shimizu, Kakamigahara, JP;
Akiyasu Okuno, Suginami-ku, JP;
Hideki Rachi, Kawasaki, JP;
NGK Insulators, Ltd., Nagoya, JP;
The Tokyo Electric Power Company, Incorporated, Chiyoda-Ku, JP;
Abstract
A current collector positive electrode enabling a NaS battery to be excellent in the charge recovery characteristic and low in internal resistance is provided, which collector has a high resistance layer formed by needle-punching glass fibers with 5 to 15 μm fiber diameter into a felt substrate made of carbon fibers or graphite fibers by needle-punching from one surface of the substrate toward another surface of the substrate. The density of the glass fibers needle-punched into the substrate is gradually decreased in the direction from the above mentioned surface to the other surface of the substrate, and the deepest portions of the needle-punched glass fibers reach the depths of 85 to 100% of the substrate thickness.