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Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries
Vertically aligned Fe, S, and Fe-S doped anatase TiO(2) nanotube arrays are prepared by an electrochemical anodization process using an organic electrolyte in which lactic acid is added as an additive. In the electrolyte, highly ordered TiO(2) nanotube layers with greater thickness of 12 μm, inner d...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623386/ https://www.ncbi.nlm.nih.gov/pubmed/34835688 http://dx.doi.org/10.3390/nano11112924 |
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author | Dasarathan, Suriyakumar Ali, Mukarram Jung, Tai-Jong Sung, Junghwan Ha, Yoon-Cheol Park, Jun-Woo Kim, Doohun |
author_facet | Dasarathan, Suriyakumar Ali, Mukarram Jung, Tai-Jong Sung, Junghwan Ha, Yoon-Cheol Park, Jun-Woo Kim, Doohun |
author_sort | Dasarathan, Suriyakumar |
collection | PubMed |
description | Vertically aligned Fe, S, and Fe-S doped anatase TiO(2) nanotube arrays are prepared by an electrochemical anodization process using an organic electrolyte in which lactic acid is added as an additive. In the electrolyte, highly ordered TiO(2) nanotube layers with greater thickness of 12 μm, inner diameter of approx. 90 nm and outer diameter of approx. 170 nm are successfully obtained. Doping of Fe, S, and Fe-S via simple wet impregnation method substituted Ti and O sites with Fe and S, which leads to enhance the rate performance at high discharge C-rates. Discharge capacities of TiO(2) tubes increased from 0.13 mAh cm(−2)(bare) to 0.28 mAh cm(−2) for Fe-S doped TiO(2) at 0.5 C after 100 cycles with exceptional capacity retention of 85 % after 100 cycles. Owing to the enhancement of thermodynamic and kinetic properties by doping of Fe-S, Li-diffusion increased resulting in remarkable discharge capacities of 0.27 mAh cm(−2) and 0.16 mAh cm(−2) at 10 C, and 30 C, respectively. |
format | Online Article Text |
id | pubmed-8623386 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86233862021-11-27 Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries Dasarathan, Suriyakumar Ali, Mukarram Jung, Tai-Jong Sung, Junghwan Ha, Yoon-Cheol Park, Jun-Woo Kim, Doohun Nanomaterials (Basel) Article Vertically aligned Fe, S, and Fe-S doped anatase TiO(2) nanotube arrays are prepared by an electrochemical anodization process using an organic electrolyte in which lactic acid is added as an additive. In the electrolyte, highly ordered TiO(2) nanotube layers with greater thickness of 12 μm, inner diameter of approx. 90 nm and outer diameter of approx. 170 nm are successfully obtained. Doping of Fe, S, and Fe-S via simple wet impregnation method substituted Ti and O sites with Fe and S, which leads to enhance the rate performance at high discharge C-rates. Discharge capacities of TiO(2) tubes increased from 0.13 mAh cm(−2)(bare) to 0.28 mAh cm(−2) for Fe-S doped TiO(2) at 0.5 C after 100 cycles with exceptional capacity retention of 85 % after 100 cycles. Owing to the enhancement of thermodynamic and kinetic properties by doping of Fe-S, Li-diffusion increased resulting in remarkable discharge capacities of 0.27 mAh cm(−2) and 0.16 mAh cm(−2) at 10 C, and 30 C, respectively. MDPI 2021-10-31 /pmc/articles/PMC8623386/ /pubmed/34835688 http://dx.doi.org/10.3390/nano11112924 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 Dasarathan, Suriyakumar Ali, Mukarram Jung, Tai-Jong Sung, Junghwan Ha, Yoon-Cheol Park, Jun-Woo Kim, Doohun Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries |
title | Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries |
title_full | Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries |
title_fullStr | Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries |
title_full_unstemmed | Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries |
title_short | Vertically Aligned Binder-Free TiO(2) Nanotube Arrays Doped with Fe, S and Fe-S for Li-ion Batteries |
title_sort | vertically aligned binder-free tio(2) nanotube arrays doped with fe, s and fe-s for li-ion batteries |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8623386/ https://www.ncbi.nlm.nih.gov/pubmed/34835688 http://dx.doi.org/10.3390/nano11112924 |
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