Application of Graphene in Anode Materials

At present, the commonly used anode material for lithium batteries is graphite. The advantages of using graphene as the anode material are:

(1) Graphene has good electrical conductivity and corrosion resistance, and can be used as a anode electrode material to enhance the electrical conductivity of active materials and current collectors;

(2) As a single-layer two-dimensional structure, the graphene sheet has no volume expansion in principle, so the structure is stable, the charge and discharge are fast, and the cycle performance is good;

(3) Nanoparticles are synthesized in situ on the surface of graphene to form a matrix composite material, and by controlling the size of the grown particles, the diffusion distance of lithium ions and electrons can be shortened and the rate performance of the material can be improved;

(4) The nanoparticles are uniformly covered on the surface of graphene, which to a certain extent can prevent the polymerization of the graphene sheet and the immersion of the electrolyte into the graphene sheet, resulting in the failure of the electrode material.