The invention belongs to the technical field of
lithium ion batteries, and particularly relates to a
coating-modified
anode material of a
lithium ion battery. The
coating-modified
anode material comprises a core layer and a shell layer which is coated outside the core layer, wherein the core layer is a
graphite or
silicon material; the shell layer is thermosetting resin with the decomposing temperature higher than 180 DEG C, and the
mass of the shell layer is 1-10% of the total
mass of the
anode material. Compared with the prior art, the
coating-modified anode material has the advantages that the surface of the core layer material is coated with the thermosetting resin, so that the resistance of the anode material can be improved, after a
short circuit occurs between a
cathode current collector and an anode diaphragm, the current can be reduced, and heat can be reduced; the anode material has a certain
flame-retardant effect and low heat
conductivity, and heat insulation can be carried out, so that the thermal
runway problem of the battery can be solved well, and the safety performance of the battery can be improved; moreover, the thermosetting resin has holes capable of enabling
lithium ions to pass, so that the electrochemical performance of the battery cannot be affected greatly; besides, because the shell layer has great mechanical intensity, the
volume expansion of the core layer material can be inhibited.