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. 10, 2015
Filed:
Jul. 30, 2012
Toyotaka Yuasa, Hitachi, JP;
Mitsuru Kobayashi, Hitachiota, JP;
Sai Ogawa, Naka-gun, JP;
Masanari Oda, Hitachi, JP;
Kan Kitagawa, Hitachinaka, JP;
Toyotaka Yuasa, Hitachi, JP;
Mitsuru Kobayashi, Hitachiota, JP;
Sai Ogawa, Naka-gun, JP;
Masanari Oda, Hitachi, JP;
Kan Kitagawa, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A positive electrode for a rechargeable lithium ion battery includes a mixture layer including a positive-electrode active material, a conducting agent, and a binder and a collector having the mixture layer formed on the surface thereof. The positive-electrode active material is a composite oxide having an olivine structure expressed by a formula LiMPO(where M represents a transition metal including at least one of Fe and Mn and a and x satisfy 0<a≦1.1 and 0.9≦x≦1.1). The conducting agent includes fibrous carbon. A carbon coating layer is formed on the surface of the collector. A part of the positive-electrode active material and a part of the fibrous carbon enter pits formed in the carbon coating layer.