Negative active material for rechargeable lithium battery, method of preparing same, and rechargeable lithium battery comprising same
AssigneeSamsung SDI Co., Ltd.
InventorsSang-Min Lee, Sung-Soo Kim, Kyou-Yoon Sheem, Sang-Jin Kim, Joon-Sup Kim, Seong-Mo Oh
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Abstract
A negative active material for a rechargeable lithium battery, a method for making the negative active material, and a rechargeable lithium battery including a carbonaceous material, which is capable of reversibly intercalating and deintercalating lithium, and particles of a metal or a metal compound or mixtures thereof, distributed in the carbonaceous material, the metal or the metal compound being capable of forming an alloy with lithium during electrochemical charging and discharging.
Claims33
A negative active material for a rechargeable lithium battery comprising:
- particles of a carbonaceous material that are capable of reversibly intercalating and deintercalating lithium;
- and
- particles of a metal or a metal compound or mixtures thereof, distributed within the particles of carbonaceous material, wherein the particles of the metal or the metal compound have an average particulate diameter of 20 to 500 nm, the metal or the metal compound forming an alloy with lithium during electrochemical charging and discharging.
A rechargeable lithium battery comprising:
- a positive electrode comprising a positive active material which reversibly intercalates and deintercalates lithium;
- a negative electrode including a negative active material;
- a separator interposed between the positive electrode and the negative electrode;
- and
- an electrolyte comprising a non-aqueous organic solvent and a lithium salt;
- and wherein the negative active material comprises:
- particles of a carbonaceous material that reversibly intercalate and deintercalate lithium, and
- a plurality of particles of a metal or a metal compound or mixtures thereof, distributed within the particles of the carbonaceous material, wherein the particles of the metal or the metal compound have an average particulate diameter of 20 to 500 nm, the metal or the metal compound being capable of forming an alloy with lithium during electrochemical charging and discharging.
Dependencies are inferred from the claim text.