183results about How to "Shorten the migration path" patented technology

The invention discloses an MOF-coated single crystal ternary positive electrode material and a preparation method of a precursor of the MOF-coated single crystal ternary positive electrode material. The preparation method comprises: firstly, preparing a solution A of nickel-cobalt-manganese metal salt according to a molar ratio, and preparing an ammonia water complexing agent solution and liquid caustic soda; then adding the solution A, an ammonia water complexing agent solution and liquid caustic soda into a reaction kettle for reaction to obtain a precursor inner core; dissolving organic carboxylate in an organic solvent to obtain a solution B; adding the solution B and a manganese metal salt solution into the reaction kettle for reaction, and aging to obtain an MOF-coated core-shell structure precursor; carrying out low-temperature presintering on the precursor with the core-shell structure to obtain a nickel-cobalt-manganese oxide with a single crystal structure; and uniformly mixing the nickel-cobalt-manganese oxide with the single crystal structure with lithium hydroxide monohydrate in a mortar, and carrying out high-temperature calcination to obtain the MOF-coated single crystal ternary positive electrode material. According to the invention, the problems of poor cycle and thermal stability caused by high nickel are overcome, and the obtained positive electrode materialhas the electrochemical properties of high multiplying power, high capacity and high cycle performance.