Эрозионная ультразвуковая очистка катодной ленты отработанных литий-ионных аккумуляторов типа NMC

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Abstract

Предложен метод очистки катодной фольги отработанного литий-ионного аккумулятора от катодного материала с помощью ультразвука. Разработана общая схема компоновки устройств с анализом взаимодействия всех основных узлов конструкции. В основу метода положен эффект кавитационной ультразвуковой эрозии твердых тел, помещенных в жидкость, которая находится под воздействием ультразвука. Получено выражение для глубины слоя покрытия, который удаляется с ленты при однократном прохождении всей ее длины через все зоны кавитации устройства. Выполнен аналитический и численный анализ зависимости скорости очистки от интенсивности ультразвука, его частоты, скорости движения ленты и других параметров схемы. Экспериментально показана возможность эффективной очистки алюминиевой фольги от катодного материала литий-ионного аккумулятора типа NMC.

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About the authors

О. М. Градов

Институт общей и неорганической химии им. Н. С. Курнакова РАН

Author for correspondence.
Email: lutt.plm@igic.ras.ru
Russian Federation, Москва

И. В. Зиновьева

Институт общей и неорганической химии им. Н. С. Курнакова РАН

Email: lutt.plm@igic.ras.ru
Russian Federation, Москва

Ю. А. Заходяева

Институт общей и неорганической химии им. Н. С. Курнакова РАН

Email: lutt.plm@igic.ras.ru
Russian Federation, Москва

А. А. Вошкин

Институт общей и неорганической химии им. Н. С. Курнакова РАН

Email: lutt.plm@igic.ras.ru
Russian Federation, Москва

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Supplementary files

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2. Fig. 1. Diagram of the impact of a spherical shock wave from a cavitation cavity on a flat surface of a solid body.

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3. Fig. 2. Scheme of ultrasonic cavitation cleaning of cathode tapes of compact power sources: a) – side view; b) – top view. 1 – distribution of ultrasound intensity in the space between piezoelectric plates; 2 – location of cavitation areas; 3 – cathode tape subjected to ultrasonic cleaning; 4 – positions of piezoceramic plates.

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4. Fig. 3. Schematic diagram of the experimental setup for studying the cleaning of aluminum foil from cathode material.

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5. Fig. 4. Dependence of the depth of the layer of the removed coating in the process of ultrasonic cavitation cleaning of cathode tapes of lithium-ion batteries on the frequency and power of the ultrasound during a single passage of the entire tape through the cavitation areas.

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6. Fig. 5. Time for complete cleaning of aluminum foil from cathode material depending on the power of the ultrasonic generator, W: 1–33; 2–44; 3–55; 4–66. Temperature 20 °C.

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7. Fig. 6. Time for complete cleaning of aluminum foil from cathode material in a 1 M citric acid solution depending on temperature at power, W: 1–33; 2–44.

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