# US 8,785,049 B2 · Negative active material for rechargeable lithium battery and rechargeable lithium battery including same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,785,049 B2 - Document ID: US8785049B2 - Status: Granted - Kind: B2 - Application number: 13/053,160 - Filed: 2011-03-21 - Published: 2012-05-10 - Granted: 2014-07-22 - Earliest claimed: 2010-11-04 - Assignees: Samsung SDI Co., Ltd. - Applicants: Bong-Chull Kim; Cheol-Hee Hwang; Dong-Yung Kim; Se-Ho Park; Hyun-Jun Choi; In-Ho Jung; Su-Ho Song - Inventors: Bong-Chull Kim; Cheol-Hee Hwang; Dong-Yung Kim; Se-Ho Park; Hyun-Jun Choi; In-Ho Jung; Su-Ho Song - Web page: https://patentgrep.com/patent/US8785049B2 ## CPC - H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - C01B 32/00: Carbon; Compounds thereof (C01B21/00, C01B23/00 take precedence; percarbonates C01B15/10; carbon black C09C1/48) - H01M 4/134: Electrodes based on metals, Si or alloys - H01M 4/1393: of electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/1395: of electrodes based on metals, Si or alloys - H01M 4/364: {as mixtures} - H01M 4/366: {as layered products} - H01M 4/48: of inorganic oxides or hydroxides - H01M 4/383: {Hydrogen absorbing alloys} - H01M 10/052: Li-accumulators - H01M 2300/0037: Mixture of solvents - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A negative active material for a rechargeable lithium battery includes a core including crystalline carbon, a metal nano particle and a MOx nano particle (where x is from 0.5 to 1.5, and M is Si, Sn, In, Al, or a combination thereof) disposed on the core surface, and a coating layer including an amorphous carbon surrounding the core surface, the metal nano particle and the MOx nano particle. A lithium rechargeable battery includes the negative active material. ## Claims ### Claim 1 A negative active material for a rechargeable lithium battery, comprising: a core comprising crystalline carbon; at least one metal particle and at least one MOx particle disposed on a surface of the core, wherein x is from about 0.5 to about 1.5, the metal particle comprises a metal selected from the group consisting of Si, Sn, In, Al, and combinations thereof, the metal particle has a FWHM of an X-ray diffraction angle (2θ) at a (111) plane of about 0.3 degrees (°) to about 0.9 degrees (°) as measured using a CuKα ray, and M is Si, Sn, In, Al, or a combination thereof; and a coating layer surrounding at least a portion of the core, the metal particle and the MOx particle, the coating layer comprising an amorphous carbon. ### Claim 2 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the metal particle and the MOx particle are mixed in a weight ratio of about 9:1 to about 2:8. ### Claim 3 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the metal particle has an average particle diameter of about 50 nm to about 800 nm. ### Claim 4 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the MOx particle has an average particle diameter of about 50 nm to about 800 nm. ### Claim 5 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the metal particle has a FWHM of a X-ray diffraction angle (2θ) at a (220) plane of about 0.35 degrees (°) to about 0.95 degrees (°) as measured using a CuKα ray. ### Claim 6 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the core has at least one pore. ### Claim 7 (depends on 6) The negative active material for a rechargeable lithium battery of claim 6, wherein the metal particle, or the MOx particle, or a mixture of the metal particle and the MOx particle is present in the pore. ### Claim 8 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the metal particle and the MOx particle are included in a combined amount of about 3 wt % to about 30 wt % based on the entire weight of the negative active material. ### Claim 9 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the core is included in an amount of about 60 wt % to about 95 wt % based on the entire weight of the negative active material. ### Claim 10 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the crystalline carbon comprises a material selected from the group consisting of natural graphite, artificial graphite, and mixtures thereof. ### Claim 11 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the coating layer is included in an amount of about 2 wt % to about 20 wt % based on the entire weight of the negative active material. ### Claim 12 (depends on 1) The negative active material for a rechargeable lithium battery of claim 1, wherein the amorphous carbon comprises a material selected from the group consisting of soft carbon, hard carbon, mesophase pitch carbonized products, fired cokes, and mixtures thereof. ### Claim 13 (depends on 1) A rechargeable lithium battery comprising: a negative electrode comprising a first negative active material comprising the negative active material of claim 1; a positive electrode comprising a positive active material; and a non-aqueous electrolyte. ### Claim 14 (depends on 13) The rechargeable lithium battery of claim 13, wherein the negative electrode further comprises a second negative active material comprising a carbon-based negative active material. ### Claim 15 (depends on 14) The rechargeable lithium battery of claim 14, wherein the first negative active material and the second negative active material are mixed in a ratio of about 5:95 wt % to about 95:5 wt %.