Method of preparing complex sulfate solution from waste scrap of secondary battery precursor for electrode material prepared using the complex sulfate solution and secondary battery to which the precursor is applied

摘要

Disclosed are a method for preparing a composite sulfate solution from waste scrap of a secondary battery, a precursor for an electrode material prepared using the composite sulfate solution, and a secondary battery to which the same is applied. The disclosed method for preparing a complex sulfate solution from waste scrap of a secondary battery leaches waste scrap containing a waste cathode material and a waste cathode material of a secondary battery to prepare a mother solution containing a metal of the first group to be recovered and a plurality of metallic impurities step, preparing a first impurity removal solution from which impurities are primarily removed through a hydrolysis reaction for the mother liquor, and 2 Preparing a secondary impurity removal solution, preparing a tertiary impurity removing solution from which impurities are tertiarily removed through a secondary solvent extraction process for the secondary impurity removing solution, hydrolysis of the tertiary impurity removing solution precipitating the first group of metals from the tertiary impurity removal solution through a reaction to obtain a precipitate cake, and leaching and filtering the precipitate cake to form a complex sulfate solution containing the first group of metals may include.