Mixed lithium manganese oxide and lithium nickel cobalt oxide po

Details Mixed lithium manganese oxide and lithium nickel cobalt oxide po Mixed lithium manganese oxide and lithium nickel cobalt oxide po

1998-06-17

1999-12-28

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429224, 429223, H01M 448, H01M 450, H01M 452

Patent

active

060079479

ABSTRACT:
Positive electrodes including a lithium nickel cobalt metal oxide are disclosed. The lithium nickel cobalt metal oxides have the general formula Li.sub.x Ni.sub.y Co.sub.z M.sub.n O.sub.2, where M is selected from the group consisting of aluminum, titanium, tungsten, chromium, molybdenum, magnesium, tantalum, silicon, and combinations thereof, x is between about 0 and about 1 and can be varied within this range by electrochemical insertion and extraction, the sum of y+z+n is about 1, n ranges between above 0 to about 0.25, y and z are both greater than 0, and the ratio z/y ranges from above 0 to about 1/3. Also disclosed are composite positive electrodes including the above-described lithium nickel cobalt metal oxides together with a lithium manganese metal oxide of the formula Li.sub.x Mn.sub.2-r M1.sub.r O.sub.4, where r is a value between 0 and 1 and M1 is chromium, titanium, tungsten, nickel, cobalt, iron, tin, zinc, zirconium, silicon, or a combination thereof.

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