Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis

With the widespread use of lithium-ion batteries, the cumulative amount of used lithium-ion batteries is also increasing year by year. Since waste lithium-ion batteries contain a large amount of valuable metals, the recovery of valuable metals has become one of the current research hotspots. The res...

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Autores principales:	Hui Li, Yutian Fu, Jinglong Liang, Chenxiao Li, Jing Wang, Hongyan Yan, Zongying Cai
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	used lithium-ion batteries recycling nickel electrochemical reduction constant current electrolysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
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spelling	oai:doaj.org-article:69e2ff043195444296400c686242dde12021-11-25T18:14:23ZElectrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis10.3390/ma142268751996-1944https://doaj.org/article/69e2ff043195444296400c686242dde12021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6875https://doaj.org/toc/1996-1944With the widespread use of lithium-ion batteries, the cumulative amount of used lithium-ion batteries is also increasing year by year. Since waste lithium-ion batteries contain a large amount of valuable metals, the recovery of valuable metals has become one of the current research hotspots. The research uses electrometallurgical technology, and the main methods used are cyclic voltammetry, square wave voltammetry, chronoamperometry and open circuit potential. The electrochemical reduction behavior of Ni<sup>3<i>+</i></sup> in NaCl-CaCl<sub>2</sub> molten salt was studied, and the electrochemical reduction behavior was further verified by using a Mo cavity electrode. It is determined that the reduction process of Ni<sup>3+</sup> in LiNiO<sub>2</sub> is mainly divided into two steps: LiNiO<sub>2</sub> → NiO → Ni. Through the analysis of electrolysis products under different conditions, when the current value of LiNiO<sub>2</sub> is not less than 0.03 A, the electrolysis product after 10 h is metallic Ni. When the current reaches 0.07 A, the current efficiency is 77.9%, while the Li<i><sup>+</sup></i> in LiNiO<sub>2</sub> is enriched in NaCl-CaCl<sub>2</sub> molten salt. The method realizes the separation and extraction of the valuable metal Ni in the waste lithium-ion battery.Hui LiYutian FuJinglong LiangChenxiao LiJing WangHongyan YanZongying CaiMDPI AGarticleused lithium-ion batteriesrecycling nickelelectrochemical reductionconstant current electrolysisTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6875, p 6875 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	used lithium-ion batteries recycling nickel electrochemical reduction constant current electrolysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	used lithium-ion batteries recycling nickel electrochemical reduction constant current electrolysis Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Hui Li Yutian Fu Jinglong Liang Chenxiao Li Jing Wang Hongyan Yan Zongying Cai Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis
description	With the widespread use of lithium-ion batteries, the cumulative amount of used lithium-ion batteries is also increasing year by year. Since waste lithium-ion batteries contain a large amount of valuable metals, the recovery of valuable metals has become one of the current research hotspots. The research uses electrometallurgical technology, and the main methods used are cyclic voltammetry, square wave voltammetry, chronoamperometry and open circuit potential. The electrochemical reduction behavior of Ni<sup>3<i>+</i></sup> in NaCl-CaCl<sub>2</sub> molten salt was studied, and the electrochemical reduction behavior was further verified by using a Mo cavity electrode. It is determined that the reduction process of Ni<sup>3+</sup> in LiNiO<sub>2</sub> is mainly divided into two steps: LiNiO<sub>2</sub> → NiO → Ni. Through the analysis of electrolysis products under different conditions, when the current value of LiNiO<sub>2</sub> is not less than 0.03 A, the electrolysis product after 10 h is metallic Ni. When the current reaches 0.07 A, the current efficiency is 77.9%, while the Li<i><sup>+</sup></i> in LiNiO<sub>2</sub> is enriched in NaCl-CaCl<sub>2</sub> molten salt. The method realizes the separation and extraction of the valuable metal Ni in the waste lithium-ion battery.
format	article
author	Hui Li Yutian Fu Jinglong Liang Chenxiao Li Jing Wang Hongyan Yan Zongying Cai
author_facet	Hui Li Yutian Fu Jinglong Liang Chenxiao Li Jing Wang Hongyan Yan Zongying Cai
author_sort	Hui Li
title	Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis
title_short	Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis
title_full	Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis
title_fullStr	Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis
title_full_unstemmed	Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis
title_sort	electrochemical mechanism of recovery of nickel metal from waste lithium ion batteries by molten salt electrolysis
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/69e2ff043195444296400c686242dde1
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Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis

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