SCHICHT-LITHIUM-NICKEL-MANGAN-KOBALT- VERBUNDOXIDPULVER FÜR DAS MATERIAL EINER POSITIVELEKTRODE EINER LITHIUM-SEKUNDÄRBATTERIE, HERSTELLUNGSPROZESS DAFÜR, POSITIVE ELEKTRODE EINER LITHIUM-SEKUNDÄRBATTERIE DARAUS UND LITHIUM-SEKUNDÄRBATTERIE
A powder of a layered lithium-nickel-manganese-cobalt composite oxide for use as a positive-electrode material for lithium secondary battery is provided which, when used as a positive-electrode material for lithium secondary battery, enables a cost reduction and higher safety to be reconciled with i...
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| Zusammenfassung: | A powder of a layered lithium-nickel-manganese-cobalt composite oxide for use as a positive-electrode material for lithium secondary battery is provided which, when used as a positive-electrode material for lithium secondary battery, enables a cost reduction and higher safety to be reconciled with improved battery performances. The powder of a layered lithium-nickel-manganese-cobalt composite oxide for use as a positive-electrode material for lithium secondary battery is composed of secondary particles formed by the aggregation of primary particles. It has a composition represented by the following formula (I), has a volume resistivity of 5x10 5 ©·cm or lower in the state of being compacted at a pressure of 40 MPa, and has a value of G/S, wherein C is the concentration of carbon contained therein (% by weight) and S is the BET specific surface area thereof (m 2 /g), of 0.025 or smaller. The powder has been regulated so as to have a volume resistivity not higher than the specified value and a considerably reduced carbon content while having a composition in a limited range, whereby a cost reduction and higher safety can be reconciled with improved battery performances.
Li 1+z Ni x Mn y Co 1-x-y O ´ (I)
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