Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Reexamination Certificate
2005-07-19
2005-07-19
Ryan, Patrick Joseph (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
C429S231300, C429S231600, C429S231500, C429S231200, C429S221000, C429S223000, C429S224000, C429S218100, C429S231100, C029S623100
Reexamination Certificate
active
06919144
ABSTRACT:
The present invention provides a nonaqueous electrolyte secondary cell having a positive electrode comprising mainly of a positive electrode active material, a negative electrode, and a nonaqueous electrolyte. The positive electrode active material is a lithium-containing transition metal composite oxide of a hexagonal crystal system that includes a compound represented by the general formula LiCo1-xMxO2, where M is at least one species selected from the group consisting of V, Cr, Fe, Mn, Ni, Al, and Ti, and x is a decimal number in a range 0<x<1, magnesium, and halogen. In a nonaqueous electrolyte secondary cell having such a construction, the high-temperature characteristics are improved without reducing the cell capacity.
REFERENCES:
patent: 2002/0037456 (2002-03-01), Hosoya
patent: 2002/0142221 (2002-10-01), Nemoto et al.
patent: 2002/0142222 (2002-10-01), Nishida et al.
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patent: 2002-298846 (2002-10-01), None
Miyazaki Shinya
Nishida Nobumichi
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