▎ 摘　　要

NOVELTY - Composite structure high manganese-based material comprises a structure composed of lithium-manganese-oxide based compound (LixMn1-y'My'O2), where x ranges between 0.95-1, y' ranges between 0.03-0.25, and M is selected from chromium, aluminum, gallium, yttrium, cobalt, nickel, copper, zirconium, titanium, vanadium or molybdenum elements. The composite structure high manganese-based material simultaneously comprises layered structure belonging to C2/m space group and disordered rock-salt structure belonging to Fm-3m space group, where disordered rock salt structure is formed in situ on the basis of layered structure. USE - Composite structure high manganese-based material used in carbon-containing composite material, and lithium ion electrode positive electrode material, positive electrode of lithium ion battery or lithium ion battery (all claimed), which is used in portable electronic devices, e.g. mobile phones and notebook computers. ADVANTAGE - The high manganese-based material has higher discharge capacity and multiplying power performance, improved first coulomb efficiency and cycle performance, and better conductivity, lithium ion diffusion rate and structure stability. The material is prepared by a simple process flow, so that the material is suitable for large-scale industrial production. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a carbon-containing composite material containing composite structure high manganese-based material, which has a structure composed of lithium-manganese-oxide based compound (LixMn1-y'My'O2/C'), where x ranges between 0.95-1, y' ranges between 0.03-0.25, M is selected from chromium, aluminum, gallium, yttrium, cobalt, nickel, copper, zirconium, titanium, vanadium or molybdenum elements, and C' is selected from conductive carbon black, conductive graphite, carbon fiber, carbon nanotube or graphene; (2) a method for preparing the high manganese base material with composite structure, which involves: (a) selecting lithium compound, manganese compound, and M compound of LixMn1-y'My'O2 structure based on selected proportioning quantity, and mixing uniformly by solid phase method; (b) pre-sintering mixture at 450-650degrees Celsius under inert atmosphere, and heating to the temperature of 700-1000degrees Celsius for calcination treatment to obtain LixMn1-y'My'O2 material with a C2/m layered structure; and (c) mixing the above LixMn1-y'My'O2, and performing high-speed ball milling on the material in ball milling tank to convert portion of C2/m layered structure into Fm-3m disordered rock salt structure to obtain material; and (3) a method for preparing carbon-containing composite material, which involves forming layered structure LixMn1-y'My'O2 material, mixing the LixMn1-y'My'O2 material with C2/m layered structure and selected C' material based on selected proportioning amount, and performing high-speed ball milling to make portion of C2/m layered structure is transformed into Fm-3m disordered rock-salt structure.