▎ 摘　　要

NOVELTY - A composite anode active material (100) comprises a core (10) comprising a silicon-containing structure and/or a silicon-containing compound, and a shell (20) comprising a carbonaceous material (22), and at least one metal oxide (I) (21), arranged in a matrix of the carbonaceous material (22), arranged on and conformed to a surface of the core. USE - Composite active material is used for forming anode for lithium battery (all claimed). Uses include but are not limited to notebook, smartphone, electric vehicle, hybrid vehicle and plug-in hybrid electric vehicle, electric bicycle, power tool, etc. ADVANTAGE - The anode formed using the composite active material provides lithium battery having improved cycle characteristics, capacity retention rate, and lifespan characteristics, by suppressing formation of solid electrolyte film on the surface and/or inside of the anode active material, and suppressed internal resistance of the lithium battery. DETAILED DESCRIPTION - A composite anode active material comprises a core comprising a silicon-containing structure and/or a silicon-containing compound, and a shell comprising a carbonaceous material (22), and at least one metal oxide of formula: MaOb(I), where M is at least one metal chosen from groups 2 to 13, 15 and 16 of the periodic table of the elements, a is more than 0 to 3, and b is more than 0 to less than 4, arranged in a matrix of the carbonaceous material (22), arranged on and conformed to a surface of the core. An INDEPENDENT CLAIM is included for an anode, which comprises the composite anode active material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view cross-sectional of the composite anode active material. 10Core 20Shell 21Metal oxide 22Carbonaceous material 100Composite anode active material