▎ 摘　　要

NOVELTY - Preparing ultra-low temperature lithium iron phosphate battery comprises (i) dry-mixing graphene, carbon nanotubes, nano lithium iron phosphate, composite lithium iron phosphate cathode material and the organosilicone coupling agent, adding binder polyvinylidene fluoride PVDF, conductive agent SP, and solvent NMP, uniformly stirring to obtain lithium iron phosphate cathode material slurry, (ii) uniformly mixing the hard carbon anode material, aqueous binder, and water, and stirring to obtain hard carbon anode slurry, (iii) coating the lithium iron phosphate cathode material slurry and the hard carbon cathode slurry respectively, drying the coated cathode sheet and anode sheet, rolling, slitting, and welding the tabs, and (iv) winding the cathode sheet, anode sheet, and separator, placing the wound battery core into the casing, injecting electrolyte, sealing the casing to obtain an ultra-low temperature lithium iron phosphate battery, and dividing into volumes. USE - The method is useful for preparing ultra-low temperature lithium iron phosphate battery. ADVANTAGE - The method: increases conductivity of the pole piece; reduces internal resistance, and diffusion path of lithium ions; and improves the low-temperature performance of the battery.