▎ 摘　　要

NOVELTY - Preparing conductive fiber paper with lithium gradient structure comprises forming conductive fiber surface of the lithium by atomic layer deposition method to form a lithium-philicmaterial coating layer to obtain conductive fiber of lithium-philic conductive fiber, lithium- lyophobic conductive fiber and lithium-philic material or mixing the lithium-philic conductive fiber and lithium-lyophobic conductive fiber according to different proportions and dispersing into the solvent, obtaining the lithium-philic conductive fiber and the lithium-philic material content of multiple mixed fiber slurry, or obtaining the conductive fiber content of the lithium-philic mixed fiber slurry and gradually reducing the content of the lithium-philic conductive fiber and the lithium-philic material or gradually reducing the content of the lithium-philic carbon nano-tube by using the paper-making wet-process. USE - The method is useful for preparing conductive fiber paper with lithium gradient structure. ADVANTAGE - The fiber paper facilitates the uniform deposition of metal lithium from the bottom layer to the top layer; solves the problem of metal lithium deposition on the top layer; and improves the cycle stability and cycle life of the lithium metal cathode. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) conductive fiber paper prepared as mentioned above, where the conductive fiber sheets comprise each other, and the conductive fiber sheet is uniformly interpretially dispersed by the conductive fibers, and each layer of conductive fiber sheets are arranged in the bottom layer conductive fibers in the underlying conductive fiber sheet Somato carbon nanotubes, where conductive fibers in the top-level conductive fibers are carbon nanotubes that are surface attached atomic deposited layers, i.e., a carbon nanotubes, which are zinc, copper, cobolt, tin, nickel, manganese, molybdenum, aluminum, gold metal, oxide, fluoride, and nanoculin, each layer of conductive fiber sheet deposited between the bottom layer and the top-layer conductive fiber sheet is a carbon nanotube of lithium carbon nanotubes and lithium carbon nanotubes, or lithium carbon nanotubes and lithium carbon nanotubes and nanocarbon interleaving forming sheet, the mass content of each layer of the conductive fiber thin nancellulose deposited between the bottom layer and the top-layer conductive fiber sheet does not exceed 20% and the carbon nanotube content of lithium in the bottom layer to the top layer of the conductive fiber sheet is incremented by layer; (2) preparing composite metal lithium cathode comprising heating solid lithium to a molten state, and subjecting lithium implantation of a high temperature melting state to conductive fiber paper; and (3) lithium metal secondary battery comprising internal contained composite metal lithium cathode.