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:
Jan. 27, 2015
Filed:
Oct. 15, 2009
Takuhiro Miyuki, Ikeda, JP;
Tetsuo Sakai, Ikeda, JP;
Junichi Niwa, Kariya, JP;
Hitotoshi Murase, Kariya, JP;
Takuhiro Miyuki, Ikeda, JP;
Tetsuo Sakai, Ikeda, JP;
Junichi Niwa, Kariya, JP;
Hitotoshi Murase, Kariya, JP;
National Institute of Advanced Industrial Science and Technology, Tokyo, JP;
Kabushiki Kaisha Toyota Jidoshokki, Aichi, JP;
Abstract
Provided is a sulfur-modified polyacrylonitrile manufacturing method that is characterized in that a starting base powder that comprises sulfur powder and polyacrylonitrile powder is mixed and the mixture is heated in a non-oxidizing environment while outflow of sulfur vapor is prevented. Also provided are a cathode for lithium batteries that uses, as the active substance, the sulfur-modified polyacrylonitrile manufactured with the method, and a lithium secondary battery that includes the cathode as a component element. This enables the practical use of an inexpensive sulfur-based material as the cathode material for lithium secondary batteries, and in particular, a sulfur-based cathode material that enables higher output and has excellent cycle life characteristics, as well as other characteristics, and secondary lithium batteries using the same can be obtained.