The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub>
In order to examine the effect of excessive sulfate in the leachate of spent Li-ion batteries (LIBs), LiNi<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (pristine NCM) and sulfate-containing LiNi<sub>1/3</sub>Co<sub>1/3&l...
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MDPI AG
2021
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oai:doaj.org-article:f34d760dfd154e119b0e64c2dc06bc3e2021-11-11T18:11:07ZThe Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub>10.3390/ma142166721996-1944https://doaj.org/article/f34d760dfd154e119b0e64c2dc06bc3e2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6672https://doaj.org/toc/1996-1944In order to examine the effect of excessive sulfate in the leachate of spent Li-ion batteries (LIBs), LiNi<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (pristine NCM) and sulfate-containing LiNi<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (NCMS) are prepared by a co-precipitation method. The crystal structures, morphology, surface species, and electrochemical performances of both cathode active materials are studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and charge-discharge tests. The XRD patterns and XPS results identify the presence of sulfate groups on the surface of NCMS. While pristine NCM exhibits a very dense surface in SEM images, NCMS has a relatively porous surface, which could be attributed to the sulfate impurities that hinder the growth of primary particles. The charge-discharge tests show that discharge capacities of NCMS at C-rates, which range from 0.1 to 5 C, are slightly decreased compared to pristine NCM. In dQ/dV plots, pristine NCM and NCMS have the same redox overvoltage regardless of discharge C-rates. The omnipresent sulfate due to the sulfuric acid leaching of spent LIBs has a minimal effect on resynthesized NCM cathode active materials as long as their precursors are adequately washed.Jimin LeeSanghyuk ParkMincheol BeakSang Ryul ParkAh Reum LeeSuk Hyun ByunJunho SongJeong Soo SohnKyungjung KwonMDPI AGarticleLi-ion batterycathode materialsulfateimpurityleachateTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6672, p 6672 (2021) |
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DOAJ |
language |
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Li-ion battery cathode material sulfate impurity leachate 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 |
Li-ion battery cathode material sulfate impurity leachate 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 Jimin Lee Sanghyuk Park Mincheol Beak Sang Ryul Park Ah Reum Lee Suk Hyun Byun Junho Song Jeong Soo Sohn Kyungjung Kwon The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> |
description |
In order to examine the effect of excessive sulfate in the leachate of spent Li-ion batteries (LIBs), LiNi<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (pristine NCM) and sulfate-containing LiNi<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (NCMS) are prepared by a co-precipitation method. The crystal structures, morphology, surface species, and electrochemical performances of both cathode active materials are studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and charge-discharge tests. The XRD patterns and XPS results identify the presence of sulfate groups on the surface of NCMS. While pristine NCM exhibits a very dense surface in SEM images, NCMS has a relatively porous surface, which could be attributed to the sulfate impurities that hinder the growth of primary particles. The charge-discharge tests show that discharge capacities of NCMS at C-rates, which range from 0.1 to 5 C, are slightly decreased compared to pristine NCM. In dQ/dV plots, pristine NCM and NCMS have the same redox overvoltage regardless of discharge C-rates. The omnipresent sulfate due to the sulfuric acid leaching of spent LIBs has a minimal effect on resynthesized NCM cathode active materials as long as their precursors are adequately washed. |
format |
article |
author |
Jimin Lee Sanghyuk Park Mincheol Beak Sang Ryul Park Ah Reum Lee Suk Hyun Byun Junho Song Jeong Soo Sohn Kyungjung Kwon |
author_facet |
Jimin Lee Sanghyuk Park Mincheol Beak Sang Ryul Park Ah Reum Lee Suk Hyun Byun Junho Song Jeong Soo Sohn Kyungjung Kwon |
author_sort |
Jimin Lee |
title |
The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> |
title_short |
The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> |
title_full |
The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> |
title_fullStr |
The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> |
title_full_unstemmed |
The Effect of Excessive Sulfate in the Li-Ion Battery Leachate on the Properties of Resynthesized Li[Ni<sub>1/3</sub>Co<sub>1/3</sub>Mn<sub>1/3</sub>]O<sub>2</sub> |
title_sort |
effect of excessive sulfate in the li-ion battery leachate on the properties of resynthesized li[ni<sub>1/3</sub>co<sub>1/3</sub>mn<sub>1/3</sub>]o<sub>2</sub> |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doaj.org/article/f34d760dfd154e119b0e64c2dc06bc3e |
work_keys_str_mv |
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