▎ 摘　　要

NOVELTY - Phase change microcapsule comprises capsule wall and spherical capsule core completely covered by the capsule wall, where microcapsule is a spherical microcapsule, the capsule core is phase change substance, the capsule wall is softening temperature is ≮ 150 °C, and the cracking temperature is ≮ 110 ° C, the capsule core is a phase-change substance, the conductive and thermally conductive coating formed by the mixture of organic film-forming resin and conductive modifier with a rupture temperature ≮ 110°C, the organic film forming resin forming the coating film is melamine formaldehyde, polystyrene or polyvinyl chloride resin. The mass ratio of the organic film forming resin forming the coating film to the film forming mixture of the conductive modifying agent is 10: (1-2). The phase-change substance forming the capsule core is paraffin, polyethylene glycol, stearic acid, or palmitic acid. USE - The phase change microcapsule is useful in the field of lithium battery manufacturing. ADVANTAGE - The phase change microcapsule: maintains a closed solid shape; and solves the technical contradiction between the safety of the lithium battery and the manufacturing process by synchronously improving the structure, material and process of the lithium battery. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: a method for preparing phase change microcapsule comprising (a) mixing the organic film-forming resin and the conductive modifier uniformly to obtain the film-forming mixture forming the coating film, (b) preparing or weighing the insulating organic matter solid particles with the phase change temperature of 55-70 ℃ as the capsule core, and (c) using spraying process or dip coating process, uniformly coating the film forming mixture on the insulating organic matter solid particle outside surface, drying, screening particles with particle diameter D50 = 0.5-1 m to obtain the phase change micro-capsule; a high-safety lithium battery composite anode, comprising a current anode body, one side surface of the current anode body is provided with a safety coating and anode active layer, which are sequentially and adhered, the safety coating and the anode collector, anode active layer, are bonded and compacted to form a laminated structure of the composite anode, where the safety coating is the elastic layer of compact structure formed by the phase change micro-capsule, and the conductive agent and the adhesive are tightly combined by the set proportion of safe particulate matter; a high-safety lithium battery, comprising a shell, a diaphragm, anode current collector, electrolyte and the high-safety lithium battery anode, where the safety coating of the high-safety lithium battery composite anode is uniformly distributed with multiple phase change micro-capsules; and a method for preparing high-safety lithium battery composite anode, comprising (1) preparing the anode current collector, safe coating of the safe slurry, and active slurry of the active layer anode, (2) coating safe slurry on one side surface of the current collector through comma scraper, spin coating, blade coating, gravure or micro-concave printing mode, and drying at the temperature of 110 ° C, the phase change microcapsule always keeps solid state, sealing state, obtaining the anode coating of the current collector, the thickness of the single surface after drying the safe coating is 0.5-5 microns, (3) coating on the outer surface of the safety coating, and drying, compacting, obtaining the anode active layer, drying under the temperature of 110 ℃, the single surface thickness after compacting is 60-110 m, the phase change microcapsule always keeps solid state, sealing state to obtain the lithium battery composite anode. DESCRIPTION OF DRAWING(S) - The drawing shows a transverse section structure schematic diagram of the phase change microcapsule. 1Anode 2Safe coating 3Anode active layer 8Phase change microcapsule