| US 7,601,462 B2 | ||
| Cathode active material for lithium rechargeable battery and lithium rechargeable battery using the same | ||
| Dong-Min Im, Gweohoon-si (Korea, Republic of); Young-Min Choi, Osan-si (Korea, Republic of); Gue-Sung Kim, Yongin-si (Korea, Republic of); Hyo-Sug Lee, Suwon-si (Korea, Republic of); and Jung-Joon Park, Cheonan-si (Korea, Republic of) | ||
| Assigned to Samsung SDI Co., Ltd., Suwon (Korea, Republic of) | ||
| Filed on Jan. 19, 2005, as Appl. No. 11/37,232. | ||
| Claims priority of application No. 10-2004-0003801 (KR), filed on Jan. 19, 2004. | ||
| Prior Publication US 2005/0158625 A1, Jul. 21, 2005 | ||
| Int. Cl. H01M 4/48 (2006.01); H01M 4/50 (2006.01); H01M 4/52 (2006.01); H01M 4/58 (2006.01) | ||
| U.S. Cl. 429—223 [429/224; 429/231.1; 429/231.3] | 17 Claims |
| 1. A cathode active material for a lithium rechargeable battery containing a cathode, an anode, and an electrolytic solution,
wherein the cathode active material comprises 0.5% by weight or less of carbonate ion (CO32−) plus bicarbonate ion (HCO3−) and 0.1% by weight or less of hydroxyl ion (OH−),
wherein the cathode active material is a compound selected from the group consisting of LixMn1−yM′yA2, LixMn2O4−zXz, LixMn2−yM′yA4, LixCo1−yM′yA2, LixCo1−yM′yO2−zXz, LixNi1−y−zCoyM′zO2−αXα, and LixNi1−y−zMnyM′zO2−αXα, where 0.95≤x≤1.1, 0≤y≤0.5, 0≤z≤0.5, 0<α≤2, M′ is at least one element selected from the group consisting of Al, Mn, Cr,
Fe, Mg, Sr, V, and a rare earth element, A is selected from the group consisting of O, F, S and P, and X is selected from
the group consisting of F, S and P.
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