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Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System

A commercially applicable and simple process for the preparation of aggregation-free metal oxide hollow nanospheres is developed by applying nanoscale Kirkendall diffusion to a large-scale spray drying process. The precursor powders prepared by spray drying are transformed into homogeneous metal oxi...

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Autores principales: Cho, Jung Sang, Ju, Hyeon Seok, Kang, Yun Chan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4817047/
https://www.ncbi.nlm.nih.gov/pubmed/27033088
http://dx.doi.org/10.1038/srep23915
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author Cho, Jung Sang
Ju, Hyeon Seok
Kang, Yun Chan
author_facet Cho, Jung Sang
Ju, Hyeon Seok
Kang, Yun Chan
author_sort Cho, Jung Sang
collection PubMed
description A commercially applicable and simple process for the preparation of aggregation-free metal oxide hollow nanospheres is developed by applying nanoscale Kirkendall diffusion to a large-scale spray drying process. The precursor powders prepared by spray drying are transformed into homogeneous metal oxide hollow nanospheres through a simple post-treatment process. Aggregation-free SnO(2) hollow nanospheres are selected as the first target material for lithium ion storage applications. Amorphous carbon microspheres with uniformly dispersed Sn metal nanopowder are prepared in the first step of the post-treatment process under a reducing atmosphere. The post-treatment of the Sn-C composite powder at 500 °C under an air atmosphere produces carbon- and aggregation-free SnO(2) hollow nanospheres through nanoscale Kirkendall diffusion. The hollow and filled SnO(2) nanopowders exhibit different cycling performances, with their discharge capacities after 300 cycles being 643 and 280 mA h g(−1), respectively, at a current density of 2 A g(−1). The SnO(2) hollow nanospheres with high structural stability exhibit superior cycling and rate performances for lithium ion storage compared to the filled ones.
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spelling pubmed-48170472016-04-05 Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System Cho, Jung Sang Ju, Hyeon Seok Kang, Yun Chan Sci Rep Article A commercially applicable and simple process for the preparation of aggregation-free metal oxide hollow nanospheres is developed by applying nanoscale Kirkendall diffusion to a large-scale spray drying process. The precursor powders prepared by spray drying are transformed into homogeneous metal oxide hollow nanospheres through a simple post-treatment process. Aggregation-free SnO(2) hollow nanospheres are selected as the first target material for lithium ion storage applications. Amorphous carbon microspheres with uniformly dispersed Sn metal nanopowder are prepared in the first step of the post-treatment process under a reducing atmosphere. The post-treatment of the Sn-C composite powder at 500 °C under an air atmosphere produces carbon- and aggregation-free SnO(2) hollow nanospheres through nanoscale Kirkendall diffusion. The hollow and filled SnO(2) nanopowders exhibit different cycling performances, with their discharge capacities after 300 cycles being 643 and 280 mA h g(−1), respectively, at a current density of 2 A g(−1). The SnO(2) hollow nanospheres with high structural stability exhibit superior cycling and rate performances for lithium ion storage compared to the filled ones. Nature Publishing Group 2016-04-01 /pmc/articles/PMC4817047/ /pubmed/27033088 http://dx.doi.org/10.1038/srep23915 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Cho, Jung Sang
Ju, Hyeon Seok
Kang, Yun Chan
Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System
title Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System
title_full Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System
title_fullStr Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System
title_full_unstemmed Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System
title_short Applying Nanoscale Kirkendall Diffusion for Template-Free, Kilogram-Scale Production of SnO(2) Hollow Nanospheres via Spray Drying System
title_sort applying nanoscale kirkendall diffusion for template-free, kilogram-scale production of sno(2) hollow nanospheres via spray drying system
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4817047/
https://www.ncbi.nlm.nih.gov/pubmed/27033088
http://dx.doi.org/10.1038/srep23915
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