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:
May. 27, 2008
Filed:
Mar. 17, 2005
Atsushi Yanai, Kobe, JP;
Yoshinori Kida, Kobe, JP;
Toshiyuki Nohma, Kobe, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
Storage performance in a charged state is improved with a non-aqueous electrolyte secondary battery using gamma-butyrolactone as a solvent. A non-aqueous electrolyte secondary battery includes a positive electrode () containing a positive electrode active material including a lithium-containing transition metal oxide; a negative electrode () containing a negative electrode active material capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte including a solute and a solvent; wherein the solvent contains 50 volume % or more of gamma-butyrolactone with respect to the total volume of the solvent, and the positive electrode active material contains a phosphate salt MPO, where Mis a metal element capable of having a valency of 3.