Positive active material for rechargeable lithium battery and method of preparing same
AssigneeSamsung SDI Co., Ltd.
InventorsHo-Jin Kweon, Hyun-Sook Jung, Yong-Chul Park, Geun-Bae Kim
Life of this patent
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Abstract
Disclosed is a positive active material for a rechargeable lithium battery. The positive active material includes at least one compound represented by formulas 1 to 4 and a metal oxide or composite metal oxide layer formed on the compound. LixNi1−yMnyF2 (1) LixNi1−yMnyS2 (2) LixNi1-−y−2MnyMzO2−aFa (3) LixNi1−y−zMnyMzO2−aSa (4) (where M is selected from the group consisting of Co, Mg, Fe, Sr, Ti, B, Si, Ga, Al, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Th, Dy, Ho, Er, Tm, Yb, Lu, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No and Lr, 0.95≦x≦1.1, 0<y≦0.99, 0≦z≦0.5, and 0≦a≦0.5).
Claims5
A positive active material for a rechargeable lithium battery comprising:
- a plurality of active material particles, each particle of the active material particles comprising at least one compound selected from the group consisting of compounds of the formulas 1 to 4 1 and 2;
- LixNi1−yMnyF2 (1)
- LixNi1−yMnyS2 (2)
- LixNi1−y−zMnyMzO2−aFa (3)
- LixNi1−y−zMnyMzO2−aSa (4)
- where M is selected from the group consisting of Co, Mg, Fe, Sr, Ti, B, Si, Ga, Al, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No and Lr, and 0.95≦x≦1.1, and 0<y≦0.99, 0≦z≦0.5, and 0≦a≦0.5;
- and a metal oxide or composite metal oxide layer generally-spherically coating each of the active material particles.
A positive active material for a rechargeable lithium battery comprising:
- a plurality of active material particles, each of the active material particles comprising at least one compound selected from the group consisting of compounds of formulas 3 and 4;
- LixNi1−y−zMnyMzO2−aFa (3)
- LixNi1−y−zMnyMzO2−aSa (4)
- where M is selected from the group consisting of Co, Mg, Fe, Sr, Ti, B, Si, Ga, Al, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ac, Th, Pa, U, Np, Pu, Am, Cm, Bk, Cf, Es, Fm, Md, No and Lr, and 0.95≦x≦1.1, 0<y≦0.99, 0≦z≦0.5, and 0≦a≦0.5;
- and a metal oxide or composite metal oxide layer generally-spherically coating each of the active material particles, and
- wherein a thickness of the metal oxide or composite metal oxide layer is 1 to 100 nm, and
- wherein the composite metal oxide comprises a metal of a metal alkoxide or a metal salt and a metal of the compound selected from the group consisting of formulas 3 and 4.
Dependencies are inferred from the claim text.