| US 7,592,100 B2 | ||
| Positive-electrode active material and nonaqueous-electrolyte secondary battery containing the same | ||
| Tsutomu Ohzuku, Nara (Japan); Hiroshi Yoshizawa, Hirakata (Japan); and Masatoshi Nagayama, Hirakata (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan); and Osaka City University, Osaka (Japan) | ||
| Appl. No. 10/333,269 PCT Filed Nov. 07, 2001, PCT No. PCT/JP01/09756 § 371(c)(1), (2), (4) Date Jan. 17, 2003, PCT Pub. No. WO02/078105, PCT Pub. Date Oct. 03, 2002. |
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| Claims priority of application No. 2001-083610 (JP), filed on Mar. 22, 2001. | ||
| Prior Publication US 2003/0170540 A1, Sep. 11, 2003 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H01M 4/58 (2006.01) | ||
| U.S. Cl. 429—231.1 [429/231.3; 429/218.1; 429/221; 429/223; 429/224] | 14 Claims |
| 1. A positive electrode active material for a non-aqueous electrolyte battery, comprising crystalline particles of a lithium-containing
oxide containing two kinds of transition metal elements,
said crystalline particles having a layered crystal structure, and
oxygen atoms constituting said lithium-containing oxide forming a cubic closest packing structure, and
said two kinds of transition metal elements are nickel element and manganese element,
wherein said lithium-containing oxide contains said two kinds of transition metal elements in substantially the same proportion,
and
said lithium-containing oxide is expressed by formula (3):
Li[Lix(AyByCp)1-x]O2
where A and B are said two kinds of transition metal elements, C is at least one kind of an added element different from A
and B,
0≤x≤0.3, 0<2y+p≤1, and ⅓≤y≤0.5 and 0<p≤⅓,
a mixture of crystalline particles of said lithium-containing oxide having a particle size of 0.1 to 2 μm and secondary particles
of said crystalline particles having a particle size of 2 to 20 μm, and
said transition metals are uniformly dispersed in said crystalline particles.
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