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Recovery of Cobalt from Spent Lithium-ion Battery Cathode Materials by Using Choline Chloride-based Deep Eutectic Solvent by Honghao Yu; Shaomian Wang; Yin Li; Qian Qiao; Kun Wang; Xin Li is a Engineering article available to read on EtoBox.

What is Recovery of Cobalt from Spent Lithium-ion Battery Cathode Materials by Using Choline Chloride-based Deep Eutectic Solvent about?

## Abstract Recycling of spent lithium (Li)-ion batteries has become a hot research topic due to its surge in the quantity and environmental problems. Herein we demonstrated a new chemical configuration of choline chloride-based deep eutectic solvent (DES) to recover the cobalt from lithium cobalt oxide (LiCoO~2~), a representative cathode material for Li-ion battery. It was experimentally verified that the leaching efficiency of Co increased rapidly with the increase in the reaction temperature. Nearly 96% of Co can be leached from lithium cobalt oxide after a leaching treatment at 200°C for 20 h. The leaching mechanism of cobalt in DES was analyzed by using a variety of techniques, including cyclic voltammetric experiments, Fourier transform infrared radiation, and ultraviolet-visible spectra. The results showed that the LiCoO~2~ dissolve into the DES via reduction of Co(iii) to Co(ii). In particular to this work, the leaching experiments were performed in a higher concentration than those in the previous studies, which significantly promoted the operating efficiency of the leaching process.

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Author

Honghao Yu; Shaomian Wang; Yin Li; Qian Qiao; Kun Wang; Xin Li

Publisher

Walter de Gruyter GmbH

Published

2022

Language

EN

Field

Engineering (Physical Sciences)