▎ 摘　　要

NOVELTY - Preparing long cycle life lithium iron phosphate composite material comprises (1) dry mixing the carbon nanotubes and the lithium supplementing agent to obtain a homogeneous mixture, (2) sand grinding and mixing iron source, phosphorus source, lithium source, carbon source, metal dopant and water to obtain uniform dispersion liquid, (3) spray drying the uniform dispersion liquid obtained in the step (2) to obtain the first intermediate product, (4) uniformly mixing the homogeneous mixture obtained in the step (1) with the first intermediate product obtained in the step (3) to obtain a second intermediate product, and (5) sintering the second intermediate product obtained in the step (4), and then crushing to obtain the lithium iron phosphate composite material with long cycle life. USE - The material is used in technical field of lithium ion battery anode materials (claimed). ADVANTAGE - The carbon nanotubes form a stable three-dimensional space conductive network, which improves the conductivity of the material, at the same time, the cage structure formed by the lithium supplement and carbon nanotubes can continuously supplement the loss of active lithium during the cycle in the anode material, and improves the battery capacity and cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for long cycle life lithium iron phosphate composite material prepared by the above method.