Negative active material for rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery including the same
AssigneeSamsung SDI Co., Ltd.
InventorsYang-Soo Kim, Wan-Uk Choi, Ri-Zhu Yin, Joon-Sup Kim, Sung-Soo Kim
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Abstract
A negative active material for a rechargeable lithium battery includes a compound represented by the following Formula 1: Li1+xTi1−x−yMyO2+z (1) wherein, in the above Formula 1, 0.01≦x≦0.5, 0≦y≦0.3, −0.2≦z≦0.2, and M is an element selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Zr, Nb, Mo, W, Ag, Sn, Ge, Si, Al, and combinations thereof. The negative active material has high capacity and excellent cycle-life characteristics, and particularly, can provide a rechargeable lithium battery having high capacity at high-rate charge and discharge.
Claims10
A rechargeable lithium battery comprising:
- a positive electrode comprising a positive active material being capable of intercalating and deintercalating lithium ions;
- a negative electrode comprising a negative active material of Formula 1:
- Li1+xTi1−x−yMyO2+z (1)
- wherein, in the above Formula 1, 0.01≦x≦0.5, 0<y≦0.3, −0.2≦z≦0.2, and M is an element selected from the group consisting of Fe, Ge, Al, and combinations thereof;
- and
- a non-aqueous electrolyte.
Dependencies are inferred from the claim text.