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Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries

Side-reactions in LiNi(1−x-y)Co(x)Mn(y)O(2) (0≤(−)x+y≤1) cathode materials are one kind of the problems that would deteriorate the surface structure and the electrochemical stabilities of the cathodes, especially when they are working at high cut-off voltages and high temperatures. In this study, an...

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Autores principales: Li, Wei, Yang, Lishan, Li, Yunjiao, Chen, Yongxiang, Guo, Jia, Zhu, Jie, Pan, Hao, Xi, Xiaoming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7378848/
https://www.ncbi.nlm.nih.gov/pubmed/32766209
http://dx.doi.org/10.3389/fchem.2020.00597
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author Li, Wei
Yang, Lishan
Li, Yunjiao
Chen, Yongxiang
Guo, Jia
Zhu, Jie
Pan, Hao
Xi, Xiaoming
author_facet Li, Wei
Yang, Lishan
Li, Yunjiao
Chen, Yongxiang
Guo, Jia
Zhu, Jie
Pan, Hao
Xi, Xiaoming
author_sort Li, Wei
collection PubMed
description Side-reactions in LiNi(1−x-y)Co(x)Mn(y)O(2) (0≤(−)x+y≤1) cathode materials are one kind of the problems that would deteriorate the surface structure and the electrochemical stabilities of the cathodes, especially when they are working at high cut-off voltages and high temperatures. In this study, an ultrathin (~10 nm) AlPO(4) coating layer was fabricated through a two-step “feeding” process on LiNi(0.7)Co(0.15)Mn(0.15)O(2) (NCM) cathode materials. The structure and chemical composition of the AlPO(4) coating were studied by XRD, SEM, TEM, and XPS characterizations. Further electrochemical testing revealed that the AlPO(4)-coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) cathode exhibited enhanced electrochemical stabilities in the case of high cut-off voltage at both 25 and 55°C. In detail, the AlPO(4)-coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) could deliver 186.50 mAh g(−1) with 81.5% capacity retention after 100 cycles at 1C over 3–4.5 V in coin cell, far higher than the 71.4% capacity retention of the pristine electrode. In prismatic full cell, the coated sample also kept 89.5% capacity retention at 25°C and 81.1% capacity retention at 55°C even after 300 cycles (2.75–4.35 V, 1C), showing better cycling stability than that of the pristine NCM. The ultrathin AlPO(4) coating could not only keep the bulk structure stability from the surface degradation, but also diminishes the electrochemical resistance varies after cycles, thereby supporting the coated cathodes with enhanced electrochemical stability.
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spelling pubmed-73788482020-08-05 Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries Li, Wei Yang, Lishan Li, Yunjiao Chen, Yongxiang Guo, Jia Zhu, Jie Pan, Hao Xi, Xiaoming Front Chem Chemistry Side-reactions in LiNi(1−x-y)Co(x)Mn(y)O(2) (0≤(−)x+y≤1) cathode materials are one kind of the problems that would deteriorate the surface structure and the electrochemical stabilities of the cathodes, especially when they are working at high cut-off voltages and high temperatures. In this study, an ultrathin (~10 nm) AlPO(4) coating layer was fabricated through a two-step “feeding” process on LiNi(0.7)Co(0.15)Mn(0.15)O(2) (NCM) cathode materials. The structure and chemical composition of the AlPO(4) coating were studied by XRD, SEM, TEM, and XPS characterizations. Further electrochemical testing revealed that the AlPO(4)-coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) cathode exhibited enhanced electrochemical stabilities in the case of high cut-off voltage at both 25 and 55°C. In detail, the AlPO(4)-coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) could deliver 186.50 mAh g(−1) with 81.5% capacity retention after 100 cycles at 1C over 3–4.5 V in coin cell, far higher than the 71.4% capacity retention of the pristine electrode. In prismatic full cell, the coated sample also kept 89.5% capacity retention at 25°C and 81.1% capacity retention at 55°C even after 300 cycles (2.75–4.35 V, 1C), showing better cycling stability than that of the pristine NCM. The ultrathin AlPO(4) coating could not only keep the bulk structure stability from the surface degradation, but also diminishes the electrochemical resistance varies after cycles, thereby supporting the coated cathodes with enhanced electrochemical stability. Frontiers Media S.A. 2020-07-16 /pmc/articles/PMC7378848/ /pubmed/32766209 http://dx.doi.org/10.3389/fchem.2020.00597 Text en Copyright © 2020 Li, Yang, Li, Chen, Guo, Zhu, Pan and Xi. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Li, Wei
Yang, Lishan
Li, Yunjiao
Chen, Yongxiang
Guo, Jia
Zhu, Jie
Pan, Hao
Xi, Xiaoming
Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries
title Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries
title_full Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries
title_fullStr Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries
title_full_unstemmed Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries
title_short Ultra-Thin AlPO(4) Layer Coated LiNi(0.7)Co(0.15)Mn(0.15)O(2) Cathodes With Enhanced High-Voltage and High-Temperature Performance for Lithium-Ion Half/Full Batteries
title_sort ultra-thin alpo(4) layer coated lini(0.7)co(0.15)mn(0.15)o(2) cathodes with enhanced high-voltage and high-temperature performance for lithium-ion half/full batteries
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7378848/
https://www.ncbi.nlm.nih.gov/pubmed/32766209
http://dx.doi.org/10.3389/fchem.2020.00597
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