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Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries

Lithium-rich manganese oxide is a promising candidate for the next-generation cathode material of lithium-ion batteries because of its low cost and high specific capacity. Herein, a series of xLi(2)MnO(3)·(1 − x)LiMnO(2) nanocomposites were designed via an ingenious one-step dynamic hydrothermal rou...

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Autores principales: Wang, Lian-Bang, Hu, He-Shan, Lin, Wei, Xu, Qing-Hong, Gong, Jia-Dong, Chai, Wen-Kui, Shen, Chao-Qi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401014/
https://www.ncbi.nlm.nih.gov/pubmed/34443273
http://dx.doi.org/10.3390/ma14164751
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author Wang, Lian-Bang
Hu, He-Shan
Lin, Wei
Xu, Qing-Hong
Gong, Jia-Dong
Chai, Wen-Kui
Shen, Chao-Qi
author_facet Wang, Lian-Bang
Hu, He-Shan
Lin, Wei
Xu, Qing-Hong
Gong, Jia-Dong
Chai, Wen-Kui
Shen, Chao-Qi
author_sort Wang, Lian-Bang
collection PubMed
description Lithium-rich manganese oxide is a promising candidate for the next-generation cathode material of lithium-ion batteries because of its low cost and high specific capacity. Herein, a series of xLi(2)MnO(3)·(1 − x)LiMnO(2) nanocomposites were designed via an ingenious one-step dynamic hydrothermal route. A high concentration of alkaline solution, intense hydrothermal conditions, and stirring were used to obtain nanoparticles with a large surface area and uniform dispersity. The experimental results demonstrate that 0.072Li(2)MnO(3)·0.928LiMnO(2) nanoparticles exhibit a desirable electrochemical performance and deliver a high capacity of 196.4 mAh g(−1) at 0.1 C. This capacity was maintained at 190.5 mAh g(−1) with a retention rate of 97.0% by the 50th cycle, which demonstrates the excellent cycling stability. Furthermore, XRD characterization of the cycled electrode indicates that the Li(2)MnO(3) phase of the composite is inert, even under a high potential (4.8 V), which is in contrast with most previous reports of lithium-rich materials. The inertness of Li(2)MnO(3) is attributed to its high crystallinity and few structural defects, which make it difficult to activate. Hence, the final products demonstrate a favorable electrochemical performance with appropriate proportions of two phases in the composite, as high contents of inert Li(2)MnO(3) lower the capacity, while a sufficient structural stability cannot be achieved with low contents. The findings indicate that controlling the composition through a dynamic hydrothermal route is an effective strategy for developing a Mn-based cathode material for lithium-ion batteries.
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spelling pubmed-84010142021-08-29 Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries Wang, Lian-Bang Hu, He-Shan Lin, Wei Xu, Qing-Hong Gong, Jia-Dong Chai, Wen-Kui Shen, Chao-Qi Materials (Basel) Article Lithium-rich manganese oxide is a promising candidate for the next-generation cathode material of lithium-ion batteries because of its low cost and high specific capacity. Herein, a series of xLi(2)MnO(3)·(1 − x)LiMnO(2) nanocomposites were designed via an ingenious one-step dynamic hydrothermal route. A high concentration of alkaline solution, intense hydrothermal conditions, and stirring were used to obtain nanoparticles with a large surface area and uniform dispersity. The experimental results demonstrate that 0.072Li(2)MnO(3)·0.928LiMnO(2) nanoparticles exhibit a desirable electrochemical performance and deliver a high capacity of 196.4 mAh g(−1) at 0.1 C. This capacity was maintained at 190.5 mAh g(−1) with a retention rate of 97.0% by the 50th cycle, which demonstrates the excellent cycling stability. Furthermore, XRD characterization of the cycled electrode indicates that the Li(2)MnO(3) phase of the composite is inert, even under a high potential (4.8 V), which is in contrast with most previous reports of lithium-rich materials. The inertness of Li(2)MnO(3) is attributed to its high crystallinity and few structural defects, which make it difficult to activate. Hence, the final products demonstrate a favorable electrochemical performance with appropriate proportions of two phases in the composite, as high contents of inert Li(2)MnO(3) lower the capacity, while a sufficient structural stability cannot be achieved with low contents. The findings indicate that controlling the composition through a dynamic hydrothermal route is an effective strategy for developing a Mn-based cathode material for lithium-ion batteries. MDPI 2021-08-23 /pmc/articles/PMC8401014/ /pubmed/34443273 http://dx.doi.org/10.3390/ma14164751 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Lian-Bang
Hu, He-Shan
Lin, Wei
Xu, Qing-Hong
Gong, Jia-Dong
Chai, Wen-Kui
Shen, Chao-Qi
Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries
title Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries
title_full Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries
title_fullStr Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries
title_full_unstemmed Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries
title_short Electrochemically Inert Li(2)MnO(3): The Key to Improving the Cycling Stability of Li-Rich Manganese Oxide Used in Lithium-Ion Batteries
title_sort electrochemically inert li(2)mno(3): the key to improving the cycling stability of li-rich manganese oxide used in lithium-ion batteries
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8401014/
https://www.ncbi.nlm.nih.gov/pubmed/34443273
http://dx.doi.org/10.3390/ma14164751
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