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:
Nov. 18, 2008
Filed:
Mar. 04, 2004
Atsushi Yanai, Kobe, JP;
Katsunori Yanagida, Itami, JP;
Yoshinori Kida, Kobe, JP;
Takaaki Ikemachi, Kobe, JP;
Toshiyuki Nohma, Kobe, JP;
Atsushi Yanai, Kobe, JP;
Katsunori Yanagida, Itami, JP;
Yoshinori Kida, Kobe, JP;
Takaaki Ikemachi, Kobe, JP;
Toshiyuki Nohma, Kobe, JP;
SANYO Electric Co., Ltd., Osaka, JP;
Abstract
A lithium secondary battery including a positive electrode, a negative electrode including a carbon material as an active material, and a nonaqueous electrolyte comprising a solute dissolved in a nonaqueous solvent in which γ-butyrolactone is the main solvent, wherein the carbon material has a ratio (I/I) of a Raman spectrum intensity (a peak intensity ratio) (R) obtained by Raman spectroscopy of 0.2 or greater, and the nonaqueous electrolyte includes at least 0.1 part by weight of vinylene carbonate and at least 0.1 part by weight of vinyl ethylene carbonate in 100 parts by weight of the nonaqueous electrolyte.