▎ 摘　　要

NOVELTY - Preparing composite electrode material for extracting lithium, comprises (i) soaking the lithium extracting electrode active material in dopamine solution for reaction to obtain polydopamine modified electrode active material; (ii) placing the conductive agent in strong acid solution for surface treatment, sequentially performing alkaline washing and water washing until the solution is neutral to obtain a modified conductive agent; (iii) mixing the polydopamine modified electrode active material, modified conductive agent, aqueous adhesive, structure reinforcing agent, pore-forming agent and water to prepare a slurry; and (iv) coating the slurry obtained in step (iii) on current collector and performing drying and water immersion treatment to obtain a composite porous electrode material for extracting lithium. USE - The method is useful for preparing composite electrode material for extracting lithium. ADVANTAGE - The method: is simple and efficient, and is easy to industrialize. The electrode material: has good low-temperature lithium extraction and cycle performance, and can work at large current density.