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. 12, 2016
Filed:
Feb. 16, 2007
Shoichi Iwaya, Niigata, JP;
Hitoshi Masumura, Shibata, JP;
Noriyuki Sakai, Niigata, JP;
Takayuki Fujita, Niigata, JP;
Hiroshi Sasagawa, Shibata, JP;
Hiroshi Sato, Shibata, JP;
Shoichi Iwaya, Niigata, JP;
Hitoshi Masumura, Shibata, JP;
Noriyuki Sakai, Niigata, JP;
Takayuki Fujita, Niigata, JP;
Hiroshi Sasagawa, Shibata, JP;
Hiroshi Sato, Shibata, JP;
NAMICS CORPORATION, Niigata, JP;
Abstract
In multilayer wholly solid lithium ion secondary batteries, a laminate having a collector layer of material with high conductivity superimposed on an active material layer has been disposed so as to attain a lowering of battery impedance. Consequently, in the fabrication of each of positive electrode layer and negative electrode layer, stacking of three layers consisting of an active material layer, a collector layer and an active material layer has been needed, thereby posing the problem of complex processing and high production cost. In the invention, a positive electrode layer and a negative electrode layer are fabricated from paste consisting of active material mixed with conductive substance in a given mixing ratio, and no collector layer is disposed. This realizes process simplification and manufacturing cost reduction without deterioration of battery performance and has also been effective in enhancing of battery performance, such as improvement to cycle characteristics.