▎ 摘　　要

NOVELTY - Negative electrode current collector comprises zinc oxide, graphene and carbon nanotubes. The bottom layer is in contact with negative metal lithium has highest content of zinc oxide, middle layer has zinc oxide content, top layer has zinc oxide content. The zinc oxide and graphene are respectively produced by calcination of water-soluble zinc salt and graphene oxide. The content of carbon nanotubes in the three layers is same, and ratio of the mass of graphene oxide used in each layer to the mass of carbon nanotubes is 5-10:1. The mass ratio of zinc ions in the water-soluble zinc salt used in the bottom layer, middle layer and top layer to the mass of graphene oxide used in each layer is 2.8-3.8:1, 1.4-1.8:1 and 0.7-1.0:1. USE - Negative electrode current collector for lithium metal secondary battery. ADVANTAGE - The negative electrode current collector has simple preparation process and solves problem of lithium metal deposited on top layer. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing negative electrode current collector for lithium metal secondary battery, which involves: (A) adding equal amounts of carbon nanotubes to three zinc salt aqueous solutions with different zinc ion contents, performing stirring and ultrasonic treatment, and mixing uniformly to obtain three carbon nanotube suspensions, mixing three portions of same aqueous solution of graphene oxide and three portions of the carbon nanotube suspension in one-to-one correspondence, sonicating, after mixing uniformly to obtain three portions of mixed suspension, performing suction filtration of the three mixed suspensions in order from high to low zinc ion content, placing solid product collected by suction filtration at (-)4-(-)20 degrees C for random freezing for 30-60 minutes, then transferring to (-)50-(-)100 degrees C for freeze drying; and (B) calcining to obtain final product.