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. 20, 2003
Filed:
Aug. 01, 2000
Yasuo Takeda, Tsu, JP;
Yang Jun, Tsu, JP;
Other;
Abstract
A lithium secondary battery includes a negative electrode active material. The negative electrode active material includes a primary active material and a secondary active material. The primary active material is at least one member selected from the group consisting of carbonaceous materials, Sn, Sn alloys, Sn oxides, Al, Al alloys, Pb, Pb alloys, Si and Si oxides. The secondary active material includes a lithium nitride expressed by a composition formula, Li M N, in which “M” is at least one element selected from the group consisting of transition metals and “x” is 0<“x”≦0.7. In the lithium secondary battery, the negative electrode retention is relieved efficiently, the capacity is less likely to change suddenly, and the wasting of a positive electrode material is less.