Non-aqueous electrolyte secondary battery

Details Non-aqueous electrolyte secondary battery Non-aqueous electrolyte secondary battery

2011-06-07

2011-06-07

Yuan, Dah-Wei D (Department: 1727)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S224000

Reexamination Certificate

active

07955734

ABSTRACT:
A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and a non-aqueous electrolyte. The positive electrode active material includes a lithium-nickel-manganese composite oxide having a hexagonal layered rock-salt structure that belongs to the space group R-3m, and contains lithium in 3b sites that contain transition metals. The lithium-nickel-manganese composite oxide is represented by the molecular formula Li[LixNiyMnz]O2-awhere: 0<x<0.4, 0.12<y<0.5, 0.3<z<0.62, 0≦a<0.5; and the variables x, y, and z satisfy the expressions x>(1−2y)/3, ¼≦y/z≦1.0, and x+y+z=1.0. The balance between input power and output power and power characteristics are improved, and the initial charge-discharge efficiency and discharge capacity are enhanced.

REFERENCES:
patent: 2003/0108793 (2003-06-01), Dahn et al.
patent: 2003/0180620 (2003-09-01), Nakane et al.
patent: 2004/0234854 (2004-11-01), Kang et al.
patent: 1447462 (2003-10-01), None
Neudecker et al. Lithium Manganese Nickel Oxides Lix(MNyNi1-y)2-xO2: Synthesis and Characterization of Thin Films and Bulk Phases; Dec. 1998; Journal of Electrochemistry Society; vol. 145, No. 12, pp. 4148-4159.

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