▎ 摘　　要

NOVELTY - Three-dimensional gradient electrode for lithium metalanode comprises the electrode upper layer and the electrode lower layer that are stacked up and down, the electrode upper layer and the electrode lower layer are both lamellar structures, and the electrode upper layer is carbon nanotubes material , and the material of the lower layer of the electrode is silver nanowires, metal oxides, MXene, and graphene and/or carbon nanotubes. USE - Three-dimensional gradient electrode for lithium metal anode. ADVANTAGE - The metal lithium dendrite grows downwards, not growing upwards, to inhibit the growth of dendritic crystal to improve the whole performance of the battery. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparation method of the three-dimensional gradient electrode for lithium metal anode comprising (1) obtaining carbon nanotube after solvent dilution treatment, and get silver or more of nanowires, metal oxides, MXene, and graphene are evenly mixed with the diluted carbon nanotubes to obtain a mixed solution; (2) taking carbon nanotubes that have been diluted with a solvent and inject them into suction filtration. In the device, the solvent is removed by suction filtration, the mixed solution obtained in step (1) is injected into the suction filtration device, the solvent is removed by suction filtration again, and the residue after suction is finally taken out to obtain a three-dimensional gradient electrode precursor; or injecting mixed solution into the suction filtration device, removing solvent by suction filtration, taking carbon nanotubes after the solvent dilution treatment and inject it into the suction filtration device, and removing solvent by suction filtration again, and finally take out the suction filtration process, residue after drying is used to obtain a three-dimensional gradient electrode precursor; (3) frozing three-dimensional gradient electrode precursor with liquid nitrogen, and refrigerating by a freeze dryer to prepare a three-dimensional gradient electrode.