Theoretical Foundations of Chemical EngineeringTheoretical Foundations of Chemical EngineeringТеоретические основы химической технологии0040-35713034-6053The Russian Academy of Sciences65285610.31857/S0040357123050111MFGYFDArticlesСтатьиUnknownIsolation of Ti(IV) Concentrate from Spent Lithium-Ion BatteriesВыделение концентрата Ti(IV) из отработанных литий-ионных аккумуляторовKozhevnikovaA. V.КожевниковаА. В.yz@igic.ras.ruUvarovaE. S.УвароваЕ. С.yz@igic.ras.ruMilevskiiN. A.МилевскийН. А.yz@igic.ras.ruZakhodyaevaYu. A.ЗаходяеваЮ. А.yz@igic.ras.ruVoshkinA. A.ВошкинА. А.yz@igic.ras.ruKurnakov Institute of General and Inorganic Chemistry RASИнститут общей и неорганической химии им. Н.С. Курнакова РАНMendeleev University of Chemical Technology of RussiaРоссийский химико-технологический университет им. Д. И. Менделеева0109202357555356202022025Copyright ©; 2023, А.В. Кожевникова, Е.С. Уварова, Н.А. Милевский, Ю.А. Заходяева, А.А. ВошкинCopyright ©; 2023, А.В. Кожевникова, Е.С. Уварова, Н.А. Милевский, Ю.А. Заходяева, А.А. Вошкин2023А.В. Кожевникова, Е.С. Уварова, Н.А. Милевский, Ю.А. Заходяева, А.А. ВошкинА.В. Кожевникова, Е.С. Уварова, Н.А. Милевский, Ю.А. Заходяева, А.А. Вошкинhttps://transsyst.ru/0040-3571/article/view/652856

Lithium–titanate anodes are increasingly being used in the manufacturing of lithium-ion batteries due to their advantages in charge/discharge speed and safety of use relative to graphite anodes. The addition of titanium to the battery composition, along with the high content of cobalt and lithium, results in a further growth of their cost, and the reprocessing of such batteries becomes an extremely topical problem. In the framework of the present article, a comparative analysis of the hydrometallurgical reprocessing of batteries containing a lithium-titanate anode and a nickel–manganese–cobalt cathode by leaching with mineral acids (sulfuric and hydrochloric acids) is performed. In the work, the dependences of the leaching degree of the metals from real samples of the anode and cathode in their mixture on the mineral acid concentration, auxiliary additives, and solid : liquid ratio are demonstrated and the temperature and kinetic dependences for this process are obtained. Based on the results of qualitative and quantitative analysis of the leaching solutions, conditions for processing of the leaching process are proposed for further extractive separation. It is demonstrated that two-step successive leaching with hydrochloric and then sulfuric acid with the release of titanium concentrate is optimal. An important aspect of the work is the study of the joint leaching of the cathode and anode, since in the known processes of mechanical processing the stage of their separation is absent.

Литий-титанатные аноды все чаще начинают применяться в реальном производстве литий-ионных аккумуляторов ввиду их преимуществ в скорости заряда/разряда и безопасности использования относительно графитных анодов. Помимо высокого содержания кобальта и лития, добавление титана в состав аккумуляторов еще сильнее поднимает их стоимость, и вопрос переработки таких батарей становится крайне актуальным. В рамках данной статьи проведен сравнительный анализ гидрометаллургической переработки батарей, содержащих литий-титанатный анод и никель-марганец-кобальтовый катод, методом выщелачивания минеральными кислотами: серной и соляной. Показаны зависимости степени выщелачивания металлов из реальных образцов анода и катода в их смеси в зависимости от концентрации минеральной кислоты, вспомогательных добавок, соотношения твердое тело : жидкость, а также получены температурные и кинетические зависимости данного процесса. По результатам качественного и количественного анализа растворов выщелачивания были предложены условия проведения процесса выщелачивания для дальнейшего экстракционного разделения. Показано, что целесообразно двухэтапное последовательное выщелачивание соляной, а затем серной кислотой с выделением концентрата титана. Важным аспектом работы является изучение совместного выщелачивания катода и анода, поскольку в известных процессах механической переработки отсутствует стадия их разделения.

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