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Continuous-Flow Synthesis of Carbon-Coated Silicon/Iron Silicide Secondary Particles for Li-Ion Batteries
[Image: see text] The development of better Li-ion battery (LIB) electrodes requires an orchestrated effort to improve the active materials as well as the electron and ion transport in the electrode. In this paper, iron silicide is studied as an anode material for LIBs because of its higher conducti...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical
Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6990505/ https://www.ncbi.nlm.nih.gov/pubmed/31834775 http://dx.doi.org/10.1021/acsnano.9b07473 |
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author | Jo, Changshin Groombridge, Alexander S. De La Verpilliere, Jean Lee, Jung Tae Son, Yeonguk Liang, Hsin-Ling Boies, Adam M. De Volder, Michael |
author_facet | Jo, Changshin Groombridge, Alexander S. De La Verpilliere, Jean Lee, Jung Tae Son, Yeonguk Liang, Hsin-Ling Boies, Adam M. De Volder, Michael |
author_sort | Jo, Changshin |
collection | PubMed |
description | [Image: see text] The development of better Li-ion battery (LIB) electrodes requires an orchestrated effort to improve the active materials as well as the electron and ion transport in the electrode. In this paper, iron silicide is studied as an anode material for LIBs because of its higher conductivity and lower volume expansion compared to pure Si particles. In addition, carbon nanotubes (CNTs) can be synthesized from the surface of iron-silicides using a continuous flow coating process where precursors are first spray dried into micrometer-scale secondary particles and are then flown through a chemical vapor deposition (CVD) reactor. Some CNTs are formed inside the secondary particles, which are important for short-range electrical transport and good utilization of the active material. Surface-bound CNTs on the secondary particles may help establish a long-range conductivity. We also observed that these spherical secondary particles allow for better electrode coating quality, cyclability, and rate performance than unstructured materials with the same composition. The developed electrodes retain a gravimetric capacity of 1150 mAh/g over 300 cycles at 1A/g as well as a 43% capacity retention at a rate of 5 C. Further, blended electrodes with graphite delivered a 539 mAh/g with high electrode density (∼1.6 g/cm(3)) and areal capacity (∼3.5 mAh/cm(2)) with stable cycling performance. |
format | Online Article Text |
id | pubmed-6990505 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical
Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-69905052020-01-31 Continuous-Flow Synthesis of Carbon-Coated Silicon/Iron Silicide Secondary Particles for Li-Ion Batteries Jo, Changshin Groombridge, Alexander S. De La Verpilliere, Jean Lee, Jung Tae Son, Yeonguk Liang, Hsin-Ling Boies, Adam M. De Volder, Michael ACS Nano [Image: see text] The development of better Li-ion battery (LIB) electrodes requires an orchestrated effort to improve the active materials as well as the electron and ion transport in the electrode. In this paper, iron silicide is studied as an anode material for LIBs because of its higher conductivity and lower volume expansion compared to pure Si particles. In addition, carbon nanotubes (CNTs) can be synthesized from the surface of iron-silicides using a continuous flow coating process where precursors are first spray dried into micrometer-scale secondary particles and are then flown through a chemical vapor deposition (CVD) reactor. Some CNTs are formed inside the secondary particles, which are important for short-range electrical transport and good utilization of the active material. Surface-bound CNTs on the secondary particles may help establish a long-range conductivity. We also observed that these spherical secondary particles allow for better electrode coating quality, cyclability, and rate performance than unstructured materials with the same composition. The developed electrodes retain a gravimetric capacity of 1150 mAh/g over 300 cycles at 1A/g as well as a 43% capacity retention at a rate of 5 C. Further, blended electrodes with graphite delivered a 539 mAh/g with high electrode density (∼1.6 g/cm(3)) and areal capacity (∼3.5 mAh/cm(2)) with stable cycling performance. American Chemical Society 2019-12-13 2020-01-28 /pmc/articles/PMC6990505/ /pubmed/31834775 http://dx.doi.org/10.1021/acsnano.9b07473 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Jo, Changshin Groombridge, Alexander S. De La Verpilliere, Jean Lee, Jung Tae Son, Yeonguk Liang, Hsin-Ling Boies, Adam M. De Volder, Michael Continuous-Flow Synthesis of Carbon-Coated Silicon/Iron Silicide Secondary Particles for Li-Ion Batteries |
title | Continuous-Flow
Synthesis of Carbon-Coated Silicon/Iron
Silicide Secondary Particles for Li-Ion Batteries |
title_full | Continuous-Flow
Synthesis of Carbon-Coated Silicon/Iron
Silicide Secondary Particles for Li-Ion Batteries |
title_fullStr | Continuous-Flow
Synthesis of Carbon-Coated Silicon/Iron
Silicide Secondary Particles for Li-Ion Batteries |
title_full_unstemmed | Continuous-Flow
Synthesis of Carbon-Coated Silicon/Iron
Silicide Secondary Particles for Li-Ion Batteries |
title_short | Continuous-Flow
Synthesis of Carbon-Coated Silicon/Iron
Silicide Secondary Particles for Li-Ion Batteries |
title_sort | continuous-flow
synthesis of carbon-coated silicon/iron
silicide secondary particles for li-ion batteries |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6990505/ https://www.ncbi.nlm.nih.gov/pubmed/31834775 http://dx.doi.org/10.1021/acsnano.9b07473 |
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