▎ 摘　　要

NOVELTY - Improving cycle stability of cathode material for lithium-ion battery comprises firstly preparing lithium iron phosphate layer, and then preparing graphene layer, coating the lithium iron phosphate layer on the surface of the cathode material of lithium-ion battery, after drying, then coating graphene layer on the lithium iron phosphate layer, and after drying, then coating lithium iron phosphate layer on the graphene layer, and so on, so as to prepare pole pieces with alternating lithium iron phosphate layers and graphene layers, the pole piece having at least two lithium iron phosphate layers and one graphene layer. USE - The method is useful for improving cycle stability of cathode material for lithium-ion battery. ADVANTAGE - The method has simple operation, low cost, high efficiency, easy realization of large-scale and industrial production.