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Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance

[Image: see text] Li(Ni(0.8), Co(0.1), Mn(0.1))O(2) (NCM-811) cathode materials have been commercialized recently, aiming to increase the specific capacity and specific energy of the lithium-ion battery for practical applications in electric vehicles. The surface coating has been proved to be an eff...

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Autores principales: She, Shengxian, Zhou, Yangfan, Hong, Zijian, Huang, Yuhui, Wu, Yongjun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9301945/
https://www.ncbi.nlm.nih.gov/pubmed/35874193
http://dx.doi.org/10.1021/acsomega.2c03074
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author She, Shengxian
Zhou, Yangfan
Hong, Zijian
Huang, Yuhui
Wu, Yongjun
author_facet She, Shengxian
Zhou, Yangfan
Hong, Zijian
Huang, Yuhui
Wu, Yongjun
author_sort She, Shengxian
collection PubMed
description [Image: see text] Li(Ni(0.8), Co(0.1), Mn(0.1))O(2) (NCM-811) cathode materials have been commercialized recently, aiming to increase the specific capacity and specific energy of the lithium-ion battery for practical applications in electric vehicles. The surface coating has been proved to be an effective approach for the stabilization of NCM-based cathodes, which could reduce the structural instability and prevent surface reactions between the cathode materials and electrolytes. Herein, we demonstrate the facile synthesis of graphitic carbon nitride (g-C(3)N(4))-coated NCM cathodes with both the sonication-assisted liquid exfoliation method (g-C(3)N(4)NS@NCM-811) and chemical vapor-assisted coating method (g-C(3)N(4)@NCM-811). It is discovered that coating with a thin g-C(3)N(4) layer could reduce the impedance of the NCM-811 cathode material, as well as increase the cycle stability of the cathode material, leading to increased capacity retention from 130 mA h/g (for the pristine sample) to 140 mA h/g after 225 cycles. While the coating of thick g-C(3)N(4) nanosheets could hinder the lithium intercalation, resulting in significant loss of specific capacity. This study paves the way toward practical applications of the g-C(3)N(4)-coated NCM-811 cathode materials.
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spelling pubmed-93019452022-07-22 Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance She, Shengxian Zhou, Yangfan Hong, Zijian Huang, Yuhui Wu, Yongjun ACS Omega [Image: see text] Li(Ni(0.8), Co(0.1), Mn(0.1))O(2) (NCM-811) cathode materials have been commercialized recently, aiming to increase the specific capacity and specific energy of the lithium-ion battery for practical applications in electric vehicles. The surface coating has been proved to be an effective approach for the stabilization of NCM-based cathodes, which could reduce the structural instability and prevent surface reactions between the cathode materials and electrolytes. Herein, we demonstrate the facile synthesis of graphitic carbon nitride (g-C(3)N(4))-coated NCM cathodes with both the sonication-assisted liquid exfoliation method (g-C(3)N(4)NS@NCM-811) and chemical vapor-assisted coating method (g-C(3)N(4)@NCM-811). It is discovered that coating with a thin g-C(3)N(4) layer could reduce the impedance of the NCM-811 cathode material, as well as increase the cycle stability of the cathode material, leading to increased capacity retention from 130 mA h/g (for the pristine sample) to 140 mA h/g after 225 cycles. While the coating of thick g-C(3)N(4) nanosheets could hinder the lithium intercalation, resulting in significant loss of specific capacity. This study paves the way toward practical applications of the g-C(3)N(4)-coated NCM-811 cathode materials. American Chemical Society 2022-07-05 /pmc/articles/PMC9301945/ /pubmed/35874193 http://dx.doi.org/10.1021/acsomega.2c03074 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle She, Shengxian
Zhou, Yangfan
Hong, Zijian
Huang, Yuhui
Wu, Yongjun
Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance
title Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance
title_full Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance
title_fullStr Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance
title_full_unstemmed Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance
title_short Surface Coating of NCM-811 Cathode Materials with g-C(3)N(4) for Enhanced Electrochemical Performance
title_sort surface coating of ncm-811 cathode materials with g-c(3)n(4) for enhanced electrochemical performance
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9301945/
https://www.ncbi.nlm.nih.gov/pubmed/35874193
http://dx.doi.org/10.1021/acsomega.2c03074
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