▎ 摘　　要

NOVELTY - Lithium manganate anode material with excellent high temperature performance comprises a niobium-doped lithium manganate anode (1) and a poly-dopamine coating layer (2) covered on the outer side of the niobium-doped lithium manganate anode (1), where the niobium-doped lithium manganate anode (1) is manganese acetate, lithium hydroxide, graphene oxide mixture and commercial niobium pentaoxide after grinding by heat treatment, the polydopamine coating layer (2) is formed by carbonizing dopamine under the argon atmosphere. USE - Used as lithium manganate anode material with excellent high temperature performance. ADVANTAGE - The material has good cycle performance at normal temperature and high temperature. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing lithium manganate anode material with excellent high temperature performance comprises (1) weighing the manganese acetate, lithium hydroxide, graphene oxide, (2) pouring the weighed manganese acetate, lithium hydroxide, graphene oxide into water solution to mix, (3) subjecting mixture of the manganese acetate, lithium hydroxide and graphene oxide to freezing treatment until it is dried in a frozen state, (4) adding commercial niobium pentaoxide to the mixture, and grinding it, until it is uniformly grinded, forming composition of mixture and commercial niobium pentaoxide, (5) adding the composition into the heating device for heat treatment to obtain the niobium-doped lithium manganate anode (1), (6) the niobium doped lithium manganate anode (1) and dopamine are uniformly placed in the solution, the dopamine on the surface of the niobium doped lithium manganate anode (1) to form a poly-dopamine coating layer (2), (7) performing carbonization treatment to the poly-dopamine coating layer (2) coated on the surface of the niobium doped lithium manganate anode (1) under the argon atmosphere, until forming the carbon-coated niobium doped lithium manganate anode.