Cathode active material for lithium battery, cathode including the cathode active material, and lithium battery employing the cathode active material
AssigneeSamsung SDI Co., Ltd.
InventorsJae-gu Yoon, Kyu-sung Park
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Abstract
Cathode active materials for lithium batteries are provided. In one embodiment, the cathode active material is a lithium complex material represented by the following Formula: yLi[Li1/3Me2/3]O2-(1-y)LiMe′O2. In the formula, 0<y≦0.8, Me is a metal group having an oxidation number of +4 and includes a transition metal selected from Mo, W, V, Ti, Zr, Ru, Rh, Pd, Os, Ir, Pt and combinations thereof, and Me′ includes a transition metal selected from Ni, Mn, Co and combinations thereof. Lithium batteries employing the cathode active materials are also provided and exhibit improved energy density and high-rate capabilities of an electrode.
Claims19
A cathode active material for a lithium battery, the cathode active material comprising a lithium complex represented by Formula 1:
- yLi[Li1/3Me2/3]O2-(1-y)LiMe′O2 Formula 1
- wherein:
- 0<y≦0.8;
- Me is a metal group having a +4 oxidation number and comprises a transition metal selected from the group consisting of Mo, W, V, Ti, Zr, Ru, Rh, Pd, Os, Ir, Pt and combinations thereof;
- and
- Me′ comprises a transition metal selected from the group consisting of Ni, Mn, Co and combinations thereof.
Dependencies are inferred from the claim text.