ANODE ACTIVE MATERIAL OF THE NUCLEAR SHELL TYPE FOR LITHIUM SECONDARY BATTERIES, METHOD FOR PREPARING THIS MATERIAL AND LITHIUM SECONDARY BATTERIES CONTAINING THIS MATERIAL

摘要

1. Anode active material of a nuclear-shell type for lithium secondary batteries containing a core of carbon-containing material and a shell molded on top of the core of carbon-containing material, the shell contains a material with PTC (positive temperature coefficient). ! 2. Anode active material of a nuclear-shell type for lithium secondary batteries according to claim 1, characterized in that the carbon-containing material of the core is at least one selected from the group consisting of soft carbon, hard carbon, natural graphite, quiche -graphite, pyrolytic carbon, carbon fibers based on mesophase pitch, mesocarbon beads, mesophase pitch, and petroleum and coal coke. ! 3. Anode active material of a nuclear-shell type for lithium secondary batteries according to claim 1, characterized in that the particles of the material with PTC have an average size of from 2 nm to 1 μm. ! 4. The anode active material of a nuclear-shell type for lithium secondary batteries according to claim 1, characterized in that the weight ratio of carbon-containing material and material with PTC is from 100: 0.1 to 100: 2. ! 5. Anode active material of a nuclear-shell type for lithium secondary batteries according to claim 1, characterized in that the material with PTC is barium titanate. ! 6. Anode active material of a nuclear-shell type for lithium secondary batteries according to claim 1, characterized in that the shell further comprises at least one metal oxide selected from the group consisting of titanium dioxide and spinel-type lithium oxide. ! 7. Anode active material of nuclear