▎ 摘　　要

NOVELTY - A polyphase manganese-based solid solution composite cathode material comprises solid solution phases containing lithium manganese oxide monoclinal layered, lithium manganese nickel cobalt oxide rocking chair layered and three-dimensional network structure high-voltage spinel, and the graphene thin layer. USE - Polyphase manganese-based solid solution composite cathode material (claimed). ADVANTAGE - The polyphase manganese-based solid solution composite cathode material is efficiently prepared with improved intrinsic electronic conductivity, ionic conductivity low-temperature property and rate capability, and reduced irreversible capacity. DETAILED DESCRIPTION - A polyphase manganese-based solid solution composite cathode material comprises solid solution phases containing lithium manganese oxide monoclinal layered (Li2MnO3), lithium manganese nickel cobalt oxide rocking chair layered (LiMn0.5-xNi0.5-xCo2xO2) and three-dimensional network structure high-voltage spinel (LiMn1.5-xNi0.5-xCo2xO4, where x is more than 0 and less than 0.5), and the graphene thin layer. An INDEPENDENT CLAIM is included for preparation of polyphase manganese-based solid solution composite cathode material.