Composite lithium metal battery negative electrode material and preparation method thereof

The invention belongs to the technical field of lithium metal batteries, and discloses a composite lithium metal battery negative electrode material and a preparation method thereof. The preparation method comprises the steps of preparation of the MIL-96-Al and preparation of the GMM thin film. MIL-96-AL crystal powder is prepared through a hydrothermal method, then laser irradiation is carried out through an LTS technology, finally, a graphene film is obtained and serves as a composite lithium metal negative electrode material, and an obtained 3D graphene framework has the nanometer size and the porous structure and can provide more active sites; the ion transmission distance is shortened, the volume change of lithium in the deposition and stripping process is buffered, the growth of lithium dendrites is inhibited, and the coulombic efficiency, the cycle life and the safety and stability of the lithium metal battery are greatly improved. 本发明属于锂金属电池技术领域，公开了一种复合锂金属电池负极材料及其制备方法。制备方法包括MIL-96-Al的制备、GMM薄膜的制备。本发明通过