Electrochemically active material for the positive electrode...

Details Electrochemically active material for the positive electrode... Electrochemically active material for the positive electrode...

2007-10-23

2007-10-23

Weiner, Laura (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S231200, C429S231300, C429S231400, C429S231800, C429S231600, C423S594400, C423S599000, C423S594600, C252S182100

Reexamination Certificate

active

10960066

ABSTRACT:
An electrochemically active material resulting from substituting a portion of the nickel in a single-phase composite oxide of nickel and lithium of the LiNiO2type, characterized in that the active material satisfies the formula:in-line-formulae description="In-line Formulae" end="lead"?Li(M1(1-a-b-c)LiaM2bM3c)O2in-line-formulae description="In-line Formulae" end="tail"?in which: 0.02<a≦0.25; 0≦b<0.30; 0≦c<0.30; (a+b+c)<0.50; M3is at least one element selected from Al, B, and Ga; M2is at least one element selected from Mg and Zn; andin-line-formulae description="In-line Formulae" end="lead"?M1=Ni(1-x-y-z)CoxMnyM4zin-line-formulae description="In-line Formulae" end="tail"?in which M4is at least one element selected from Fe, Cu, Ti, Zr, V, Ga, and Si; and 0≦x<0.70; 0.10≦y<0.55; 0≦z<0.30; and 0.20<(1-x-y-z); b+c+z>0; and in that said active material, regardless of its state of charge, satisfies the relationship:0.40<R<0.90, where:in-line-formulae description="In-line Formulae" end="lead"?R=(1-a-b-c)*[3-[(nU
MA+dox)/(4-2b-3c)]*(2-b-2c)]in-line-formulae description="In-line Formulae" end="tail"?in which: nUis the lithium content expressed in moles; nMAis the sum of the contents of Ni, Mn, Co, and M4expressed in moles; and doxis the overall degree of oxidation of M1.

REFERENCES:
patent: 2003-031219 (2003-01-01), None
Patent Abstracts of Japan, Publication No. 11-307094; Nov. 5, 1999, pp. 1-2.
Patent Abstracts of Japan, Publication No. 2003-068298; Mar. 7, 2003, p. 1.
Patent Abstracts of Japan, Publication No. 2003-031219; Jan. 1, 2003, pp. 1-2.

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