▎ 摘　　要

NOVELTY - Extracting lithium from salt lake brine comprises (i) using an electrodialysis device, lead as the anode, conductive substrate coated with ion sieve as the cathode, an anion exchange membrane (3) to vertically divide an electrolytic cell (4) into a cathode chamber and an anode chamber, and adding sulfate into the anode chamber and chloride mixed solution, adding salt lake brine (6) into the cathode chamber, embedding lithium ion in the salt lake brine of the cathode chamber after power-on in the ion sieve to form a lithium-intercalated ion sieve, generating lead as the anode lead sulfate; (ii) completing after the reaction, turning over the positive and negative poles of the power supply, using the lead sulfate as the cathode, and using the lithium intercalated ions generated sieve which is the anode, keeping the mixed solution of sulfate and chloride in the cathode chamber unchanged, replacing solution in the anode chamber by a supporting electrolyte solution. USE - The method is useful for extracting lithium from salt lake brine. ADVANTAGE - The method can ensure that the cathode ion sieve can embed enough lithium, and the capacity of cathode and anode delithiation and lithium intercalation can be more matched by adjusting the current, which improves the recovery efficiency of lithium; fully exerts the adsorption capacity of the adsorption material and reduces the low temperature; and solves problem of capacity fading under the condition. DESCRIPTION OF DRAWING(S) - The drawing shows a structure schematic diagram of the electrolytic cell. 1Lead anode 2Ion sieve cathode 3Anion exchange membrane 4Electrolytic cell 5Sulfate solution 6Salt lake brine