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:
Jul. 26, 2005
Filed:
Feb. 11, 2002
Christina Lampe-onnerud, Framingham, MA (US);
Per Onnerud, Framingham, MA (US);
Jie Shi, Acton, MA (US);
Sharon Dalton, Malden, MA (US);
Tomoyoshi Koizumi, Iwaki, JP;
Aisaku Nagai, Iwaki, JP;
Christina Lampe-Onnerud, Framingham, MA (US);
Per Onnerud, Framingham, MA (US);
Jie Shi, Acton, MA (US);
Sharon Dalton, Malden, MA (US);
Tomoyoshi Koizumi, Iwaki, JP;
Aisaku Nagai, Iwaki, JP;
Kureha Chemical Industry Co., Ltd., Tokyo, JP;
Abstract
A composition suitable for use as a cathode material of a lithium battery includes a core material having an empirical formula LiM'NiM″O. 'x' is equal to or greater than about 0.1 and equal to or less than about 1.3. 'y' is greater than about 0.0 and equal to or less than about 0.5. “z” is greater than about 0.0 and equal to or less than about 0.2. M′ is at least one member of the group consisting of sodium, potassium, nickel, calcium, magnesium and strontium. M″ is at least one member of the group consisting of cobalt, iron, manganese, chromium, vanadium, titanium, magnesium, silicon, boron, aluminum and gallium. A coating on the core has a greater ratio of cobalt to nickel than the core. The coating and, optionally, the core can be a material having an empirical formula LiANiCoBO. “x1” is greater than about 0.1 a equal to or less than about 1.3. “x2,” “y1” and “z1” each is greater than about 0.0 and equal to or less than about 0.2. “a” is greater than 1.5 and less than about 2.1. “A” is at least one element selected from the group consisting of barium, magnesium, calcium and strontium. “B” is at least one element selected from the group consisting of boron, aluminum, gallium, manganese, titanium, vanadium and zirconium.