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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Autores principales: Jimin Lee, Sanghyuk Park, Mincheol Beak, Sang Ryul Park, Ah Reum Lee, Suk Hyun Byun, Junho Song, Jeong Soo Sohn, Kyungjung Kwon
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Publicado: MDPI AG 2021
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spelling 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)
institution DOAJ
collection DOAJ
language EN
topic 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
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