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Electrochemical Performance of Nanosized Disordered LiVOPO(4)
[Image: see text] ε-LiVOPO(4) is a promising multielectron cathode material for Li-ion batteries that can accommodate two electrons per vanadium, leading to higher energy densities. However, poor electronic conductivity and low lithium ion diffusivity currently result in low rate capability and poor...
Autores principales: | , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644837/ https://www.ncbi.nlm.nih.gov/pubmed/31458891 http://dx.doi.org/10.1021/acsomega.8b00763 |
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author | Shi, Yong Zhou, Hui Seymour, Ieuan D. Britto, Sylvia Rana, Jatinkumar Wangoh, Linda W. Huang, Yiqing Yin, Qiyue Reeves, Philip J. Zuba, Mateusz Chung, Youngmin Omenya, Fredrick Chernova, Natasha A. Zhou, Guangwen Piper, Louis F. J. Grey, Clare P. Whittingham, M. Stanley |
author_facet | Shi, Yong Zhou, Hui Seymour, Ieuan D. Britto, Sylvia Rana, Jatinkumar Wangoh, Linda W. Huang, Yiqing Yin, Qiyue Reeves, Philip J. Zuba, Mateusz Chung, Youngmin Omenya, Fredrick Chernova, Natasha A. Zhou, Guangwen Piper, Louis F. J. Grey, Clare P. Whittingham, M. Stanley |
author_sort | Shi, Yong |
collection | PubMed |
description | [Image: see text] ε-LiVOPO(4) is a promising multielectron cathode material for Li-ion batteries that can accommodate two electrons per vanadium, leading to higher energy densities. However, poor electronic conductivity and low lithium ion diffusivity currently result in low rate capability and poor cycle life. To enhance the electrochemical performance of ε-LiVOPO(4), in this work, we optimized its solid-state synthesis route using in situ synchrotron X-ray diffraction and applied a combination of high-energy ball-milling with electronically and ionically conductive coatings aiming to improve bulk and surface Li diffusion. We show that high-energy ball-milling, while reducing the particle size also introduces structural disorder, as evidenced by (7)Li and (31)P NMR and X-ray absorption spectroscopy. We also show that a combination of electronically and ionically conductive coatings helps to utilize close to theoretical capacity for ε-LiVOPO(4) at C/50 (1 C = 153 mA h g(–1)) and to enhance rate performance and capacity retention. The optimized ε-LiVOPO(4)/Li(3)VO(4)/acetylene black composite yields the high cycling capacity of 250 mA h g(–1) at C/5 for over 70 cycles. |
format | Online Article Text |
id | pubmed-6644837 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-66448372019-08-27 Electrochemical Performance of Nanosized Disordered LiVOPO(4) Shi, Yong Zhou, Hui Seymour, Ieuan D. Britto, Sylvia Rana, Jatinkumar Wangoh, Linda W. Huang, Yiqing Yin, Qiyue Reeves, Philip J. Zuba, Mateusz Chung, Youngmin Omenya, Fredrick Chernova, Natasha A. Zhou, Guangwen Piper, Louis F. J. Grey, Clare P. Whittingham, M. Stanley ACS Omega [Image: see text] ε-LiVOPO(4) is a promising multielectron cathode material for Li-ion batteries that can accommodate two electrons per vanadium, leading to higher energy densities. However, poor electronic conductivity and low lithium ion diffusivity currently result in low rate capability and poor cycle life. To enhance the electrochemical performance of ε-LiVOPO(4), in this work, we optimized its solid-state synthesis route using in situ synchrotron X-ray diffraction and applied a combination of high-energy ball-milling with electronically and ionically conductive coatings aiming to improve bulk and surface Li diffusion. We show that high-energy ball-milling, while reducing the particle size also introduces structural disorder, as evidenced by (7)Li and (31)P NMR and X-ray absorption spectroscopy. We also show that a combination of electronically and ionically conductive coatings helps to utilize close to theoretical capacity for ε-LiVOPO(4) at C/50 (1 C = 153 mA h g(–1)) and to enhance rate performance and capacity retention. The optimized ε-LiVOPO(4)/Li(3)VO(4)/acetylene black composite yields the high cycling capacity of 250 mA h g(–1) at C/5 for over 70 cycles. American Chemical Society 2018-07-03 /pmc/articles/PMC6644837/ /pubmed/31458891 http://dx.doi.org/10.1021/acsomega.8b00763 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Shi, Yong Zhou, Hui Seymour, Ieuan D. Britto, Sylvia Rana, Jatinkumar Wangoh, Linda W. Huang, Yiqing Yin, Qiyue Reeves, Philip J. Zuba, Mateusz Chung, Youngmin Omenya, Fredrick Chernova, Natasha A. Zhou, Guangwen Piper, Louis F. J. Grey, Clare P. Whittingham, M. Stanley Electrochemical Performance of Nanosized Disordered LiVOPO(4) |
title | Electrochemical Performance of Nanosized Disordered
LiVOPO(4) |
title_full | Electrochemical Performance of Nanosized Disordered
LiVOPO(4) |
title_fullStr | Electrochemical Performance of Nanosized Disordered
LiVOPO(4) |
title_full_unstemmed | Electrochemical Performance of Nanosized Disordered
LiVOPO(4) |
title_short | Electrochemical Performance of Nanosized Disordered
LiVOPO(4) |
title_sort | electrochemical performance of nanosized disordered
livopo(4) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644837/ https://www.ncbi.nlm.nih.gov/pubmed/31458891 http://dx.doi.org/10.1021/acsomega.8b00763 |
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