method for recovering lithium from used anode of lithium ion secondary battery

• Main Authors: PARK JI YOON, KIM MIN CHAN, PARK GEON YONG, PARK YOUNGGOO, SEO JANG HYUN
• Format: Patent
• Language: English; Korean
• Published: 25.05.2021
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The present invention relates to a method for recovering lithium from waste cathode material of a lithium-ion secondary battery, and more specifically, to a method for recovering lithium from waste cathode material of a lithium-ion secondary battery which can efficiently recover the lithium contained in the waste cathode material of the lithium-ion secondary battery in a simple and easy way. The method includes: a first step of preparing the waste cathode material of the lithium-ion secondary battery; a second step of crushing the prepared waste cathode material of the lithium-ion secondary battery to prepare a waste cathode material powder having an average particle size of 80 to 120μm; a third step of dissolving the waste cathode material powder in water to prepare a meltage; a fourth step of acid-treating the meltage at a temperature of 40 to 70°C. to prepare an acid-treated meltage; and a fifth step of removing an insoluble precipitate contained in the acid-treated meltage. 본 발명은 리튬이온 이차전지의 폐 양극재로부터 리튬을 회수하는 방법에 관한 것으로써, 보다 상세하게는 단순 용이한 방법으로 리튬이온 이차전지의 폐 양극재에 포함되어 있는 리튬을 효율적으로 회수할 수 있는 리튬이온 이차전지의 폐 양극재로부터 리튬을 회수하는 방법에 관한 것이다.