Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material

Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material

The effect of electrochemically active MnO<sub>2</sub> as a coating material on the electrochemical properties of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> (LTMO) cathode material is expl...

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Autores principales: Zhong Li, Peiyue Yang, Zhongxiang Zheng, Qiyun Pan, Yisi Liu, Yao Li, Jinnan Xuan
Formato: article
Lenguaje:EN
Publicado: MDPI AG 2021
Materias:
lithium-rich cathode material
surface modification
manganese dioxide
electrochemical performance
Mechanical engineering and machinery
TJ1-1570
Acceso en línea:https://doaj.org/article/f0ae4bfc911948aaa00aaca76f87194f
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spelling oai:doaj.org-article:f0ae4bfc911948aaa00aaca76f87194f2021-11-25T18:23:48ZExploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material10.3390/mi121114102072-666Xhttps://doaj.org/article/f0ae4bfc911948aaa00aaca76f87194f2021-11-01T00:00:00Zhttps://www.mdpi.com/2072-666X/12/11/1410https://doaj.org/toc/2072-666XThe effect of electrochemically active MnO<sub>2</sub> as a coating material on the electrochemical properties of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> (LTMO) cathode material is explored in this article. The structural analysis indicated that the layered structure of the LTMO was unchanged after the modification with MnO<sub>2</sub>. The morphology inspection demonstrated that the rod-like LTMO particles were encapsulated by a compact coating layer. The MnO<sub>2</sub> layer was able to hinder the electrolyte solution from corroding the LTMO particles and optimized the formation of a solid electrolyte interface (SEI). Meanwhile, lithium ions were reversibly inserted into and extracted from MnO<sub>2</sub>, which afforded an additional capacity. Compared with the bare LTMO, the MnO<sub>2</sub>-coated sample exhibited enhanced electrochemical performance. After the MnO<sub>2</sub> coating, the first discharge capacity rose from 224.2 to 239.1 mAh/g, and the initial irreversible capacity loss declined from 78.2 to 46.0 mAh/g. Meanwhile, the cyclic retention climbed up to 88.2% after 100 cycles at 0.5 C, which was more competitive than that of the bare LTMO with a value of 71.1%. When discharging at a high current density of 2 C, the capacity increased from 100.5 to 136.9 mAh/g after the modification. These investigations may be conducive to the practical application of LTMO in prospective automotive Li-ion batteries.Zhong LiPeiyue YangZhongxiang ZhengQiyun PanYisi LiuYao LiJinnan XuanMDPI AGarticlelithium-rich cathode materialsurface modificationmanganese dioxideelectrochemical performanceMechanical engineering and machineryTJ1-1570ENMicromachines, Vol 12, Iss 1410, p 1410 (2021)
institution DOAJ
collection DOAJ
language EN
topic lithium-rich cathode material
surface modification
manganese dioxide
electrochemical performance
Mechanical engineering and machinery
TJ1-1570
spellingShingle lithium-rich cathode material
surface modification
manganese dioxide
electrochemical performance
Mechanical engineering and machinery
TJ1-1570
Zhong Li
Peiyue Yang
Zhongxiang Zheng
Qiyun Pan
Yisi Liu
Yao Li
Jinnan Xuan
Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material
description The effect of electrochemically active MnO<sub>2</sub> as a coating material on the electrochemical properties of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> (LTMO) cathode material is explored in this article. The structural analysis indicated that the layered structure of the LTMO was unchanged after the modification with MnO<sub>2</sub>. The morphology inspection demonstrated that the rod-like LTMO particles were encapsulated by a compact coating layer. The MnO<sub>2</sub> layer was able to hinder the electrolyte solution from corroding the LTMO particles and optimized the formation of a solid electrolyte interface (SEI). Meanwhile, lithium ions were reversibly inserted into and extracted from MnO<sub>2</sub>, which afforded an additional capacity. Compared with the bare LTMO, the MnO<sub>2</sub>-coated sample exhibited enhanced electrochemical performance. After the MnO<sub>2</sub> coating, the first discharge capacity rose from 224.2 to 239.1 mAh/g, and the initial irreversible capacity loss declined from 78.2 to 46.0 mAh/g. Meanwhile, the cyclic retention climbed up to 88.2% after 100 cycles at 0.5 C, which was more competitive than that of the bare LTMO with a value of 71.1%. When discharging at a high current density of 2 C, the capacity increased from 100.5 to 136.9 mAh/g after the modification. These investigations may be conducive to the practical application of LTMO in prospective automotive Li-ion batteries.
format article
author Zhong Li
Peiyue Yang
Zhongxiang Zheng
Qiyun Pan
Yisi Liu
Yao Li
Jinnan Xuan
author_facet Zhong Li
Peiyue Yang
Zhongxiang Zheng
Qiyun Pan
Yisi Liu
Yao Li
Jinnan Xuan
author_sort Zhong Li
title Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material
title_short Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material
title_full Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material
title_fullStr Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material
title_full_unstemmed Exploring the Effect of a MnO<sub>2</sub> Coating on the Electrochemical Performance of a Li<sub>1.2</sub>Mn<sub>0.54</sub>Ni<sub>0.13</sub>Co<sub>0.13</sub>O<sub>2</sub> Cathode Material
title_sort exploring the effect of a mno<sub>2</sub> coating on the electrochemical performance of a li<sub>1.2</sub>mn<sub>0.54</sub>ni<sub>0.13</sub>co<sub>0.13</sub>o<sub>2</sub> cathode material
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/f0ae4bfc911948aaa00aaca76f87194f
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