Preparation method of graphene-containing lithium manganate positive pole piece

The invention relates to a graphene-containing lithium manganate positive pole piece is formed by applying a coating material on an aluminum foil surface. The coating material is composed of the following components in percentage by weight: 75-94% of positive pole material, 1-15% of conducting agent and 5-10% of binding agent. The positive pole piece prepared by the preparation method enhances the capacity, cycle performance and rate capability of the battery, and improves the availability of graphene.