Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2005-04-12
2005-04-12
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C429S221000, C429S223000, C429S232000, C429S231300, C429S231500, C252S182100, C423S594200, C423S594400, C423S594600, C423S594120, C423S598000
Reexamination Certificate
active
06878490
ABSTRACT:
The present invention is a positive electrode active material that can be used in secondary lithium and lithium-ion batteries to provide the power capability, i.e., the ability to deliver or retake energy in short periods of time, desired for large power applications such as power tools, electric bikes and hybrid electric vehicles. The positive electrode active material of the invention includes at least one electron conducting compound of the formula LiM1x−y{A}yOzand at least one electron insulating and lithium ion conducting lithium metal oxide, wherein M1is a transition metal, {A} is represented by the formula ΣwiBiwherein Biis an element other than M1used to replace the transition metal M1and wiis the fractional amount of element Biin the total dopant combination such that Σwi=1; Biis a cation in LiM1x−y{A}yOz; 0.95≦x≦2.10; 0≦y≦x/2; and 1.90≦z≦4.20. Preferably, the lithium metal oxide is LiAlO2or Li2M2O3wherein M2is at least one tetravalent metal selected from the group consisting of Ti, Zr, Sn, Mn, Mo, Si, Ge, Hf, Ru and Te. The present invention also includes methods of making this positive electrode active material.
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International Search Report corresponding to PCT/US02/26141. Mailed on Feb. 27, 2004.
Engel John F.
Gao Yuan
Leonowicz Michael E.
Palepu Prakash
Yakovleva Marina
FMC Corporation
Kalafut Stephen J.
Myers Bigel Sibley & Sajovec P.A.
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