Cathode and lithium battery using same
AssigneeSamsung SDI Co., Ltd.
InventorKyu-Sung PARK
Life of this patent
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Abstract
A cathode and a lithium battery including the cathode include a cathode active material that is obtained from a compound, Li2MoO3, in which molybdenum is doped or partially substituted with a heterogeneous element. The cathode active material includes a compound represented by LixMyMozO3, in which M is a dopant that decreases the mobility of the molybdenum upon charging and discharging of the battery. Accordingly, the cathode has improved electrical characteristics.
Claims20
A cathode in which a cathode active material composition including a conducting agent, a binder, and a cathode active material is disposed on a surface of a collector, wherein the cathode active material comprises a compound represented by Formula 1 below:
- LixMyMozO3 <Formula 1>
- wherein 0.1≦x≦2.3, 0<y≦0.3, 0.7≦z≦1.1, and
- wherein M is one selected from the group consisting of Al, Ga, Ge, Mg, Zn, Cd, K, Na, Ca, Si, Cu, Sn, B, P, Se, Bi, As, Zr, Cr, Sr, Sc, Y, Ba, a rare-earth element, and mixtures thereof.
A cathode active material for a battery, the cathode active material comprising a compound represented by Formula 1 below:
- LixMyMozO3 <Formula 1>
- wherein 0.1≦x≦2.3, 0<y≦0.3, 0.7≦z≦1.1, and
- wherein M is one selected from the group consisting of Al, Ga, Ge, Mg, Zn, Cd, K, Na, Ca, Si, Cu, Sn, B, P, Se, Bi, As, Zr, Cr, Sr, Sc, Y, Ba, a rare-earth element, and mixtures thereof.
A cathode active material for a battery, the cathode active material comprising a compound represented by Formula 1 below:
- LixMyMozO3 <Formula 1>
- wherein M is a dopant that decreases mobility of the Mo during charging and/or discharging of the battery.
A method of preparing a cathode active material for a battery, the method comprising:
- mixing Li2MoO4 with a dopant M in the presence of carbon to form a mixture;
- heat treating the mixture to form LixMyMozO3.
Dependencies are inferred from the claim text.