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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...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2020
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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. |
format | Online Article Text |
id | pubmed-7378848 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
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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