Improvement of leaching efficiency of cathode material of spent LiNi_xCo_y MnzO₂ lithium-ion battery by the in-situ thermal reduction

• Autorzy: Lu Qichang , Jiang Haidi , Xie Weining , Zhang Guangwen , He Yaqun , Duan Chenlong , Zhang Jing , Yu Zhaoyi

Identyfikatory

DOI

10.37190/ppmp/132762

• Języki publikacji: EN

Abstrakty

EN

Green cars and electronic products consume lots of lithium-ion batteries (LIBs), and massive spent LIBs are yielded due to performance degradation. This paper provides an economical and environmentally friendly approach to recover valuable metals from cathode materials of the spent LIBs. It combines the in-situ thermal reduction (self-reduction by polyvinylidene fluoride (PVDF) and residual electrolyte in cathode material) and sulfuric acid leaching. Elements of high valent are reduced by the binder (PVDF) and the residual electrolyte on the surface of NCM(LiNi_xCo_yMn_1-x-yyO₂) material at high temperatures. Moreover, the changes in substance type, element valency, and contents of cathode materials reduced with various terminal temperatures and retention time are analyzed by Xray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Results show that the optimal terminal temperature for in-situ thermal reduction is 600 °C, and the optimum retention time is 120 min. Under the best in-situ thermal reduction conditions, the results from XRD confirm that part of Ni²⁺ is converted to simple substance Ni, Co³⁺ is reduced to Co, and Mn⁴⁺ is reduced to Mn²⁺ and elemental Mn, which are confirmed by XRD. Analyzed results by XPS indicate that the content of Ni²⁺ decreases to 67.05%, and Co³⁺ is completely reduced to Co. Mn⁴⁺ is reduced to 91.41% of Mn²⁺ and 8.59% of simple substance Mn. In-situ thermal reduction benefits the leaching processes of cathode materials. The leaching efficiencies of Ni, Co, and Mn increase from 53.39%, 51.95%, and 0.71% to 99.04%, 96.98%, and 97.52%, respectively.

Słowa kluczowe

EN

spent lithium-ion batteries; in-situ thermal reduction; leaching efficiency; LiNixCoyMnzO

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2021
• Tom: Vol. 57, iss. 2
• Strony: 70--82
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Lu Qichang

• School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Jiang Haidi

• School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Xie Weining

• Advanced Analysis and Computation Center, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Zhang Guangwen

• School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China

autor

He Yaqun

• School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Duan Chenlong

• School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

autor

Zhang Jing

• Department of Computer Science, Emory University, Georgia 30322, USA

autor

Yu Zhaoyi

• School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China

Bibliografia

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• ZHU, X.-N., ZHANG, H., NIE, C.-C., LIU, X.-Y., LYU, X.-J., TAO, Y.-J., QIU, J., LI, L., ZHANG, G.-W., 2020a. Recycling metals from-0.5 mm waste printed circuit boards by flotation technology assisted by ionic renewable collector. Journal of Cleaner Production 258, 120628.
• ZHU, X.-N., ZHANG, Y.-K., ZHANG, Y.-Q., YAN, Z.-Q., NIE, C.-C., LYU, X.-J., TAO, Y.-J., QIU, J., LI, L., 2020b. Flotation dynamics of metal and non-metal components in waste printed circuit boards. Journal of Hazardous Materials 392, 122322.leaching efficiencies of Ni, Co, and Mn increase from 53.39%, 51.95%, and 0.71% to 99.04%, 96.98%, and 97.52%, respectively.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).