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Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials

The reduced graphene oxide (RGO)/carbon double-coated 3-D porous ZnO aggregates (RGO/C/ZnO) have been successfully synthesized as anode materials for Li-ion batteries with excellent cyclability and rate capability. The mesoporous ZnO aggregates prepared by a simple solvothermal method are sequential...

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Autores principales: Wi, Sungun, Woo, Hyungsub, Lee, Sangheon, Kang, Joonhyeon, Kim, Jaewon, An, Subin, Kim, Chohui, Nam, Seunghoon, Kim, Chunjoong, Park, Byungwoo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4422825/
https://www.ncbi.nlm.nih.gov/pubmed/25977674
http://dx.doi.org/10.1186/s11671-015-0902-7
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author Wi, Sungun
Woo, Hyungsub
Lee, Sangheon
Kang, Joonhyeon
Kim, Jaewon
An, Subin
Kim, Chohui
Nam, Seunghoon
Kim, Chunjoong
Park, Byungwoo
author_facet Wi, Sungun
Woo, Hyungsub
Lee, Sangheon
Kang, Joonhyeon
Kim, Jaewon
An, Subin
Kim, Chohui
Nam, Seunghoon
Kim, Chunjoong
Park, Byungwoo
author_sort Wi, Sungun
collection PubMed
description The reduced graphene oxide (RGO)/carbon double-coated 3-D porous ZnO aggregates (RGO/C/ZnO) have been successfully synthesized as anode materials for Li-ion batteries with excellent cyclability and rate capability. The mesoporous ZnO aggregates prepared by a simple solvothermal method are sequentially modified through distinct carbon-based double coating. These novel architectures take unique advantages of mesopores acting as space to accommodate volume expansion during cycling, while the conformal carbon layer on each nanoparticle buffering volume changes, and conductive RGO sheets connect the aggregates to each other. Consequently, the RGO/C/ZnO exhibits superior electrochemical performance, including remarkably prolonged cycle life and excellent rate capability. Such improved performance of RGO/C/ZnO may be attributed to synergistic effects of both the 3-D porous nanostructures and RGO/C double coating. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s11671-015-0902-7) contains supplementary material, which is available to authorized users.
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spelling pubmed-44228252015-05-14 Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials Wi, Sungun Woo, Hyungsub Lee, Sangheon Kang, Joonhyeon Kim, Jaewon An, Subin Kim, Chohui Nam, Seunghoon Kim, Chunjoong Park, Byungwoo Nanoscale Res Lett Nano Express The reduced graphene oxide (RGO)/carbon double-coated 3-D porous ZnO aggregates (RGO/C/ZnO) have been successfully synthesized as anode materials for Li-ion batteries with excellent cyclability and rate capability. The mesoporous ZnO aggregates prepared by a simple solvothermal method are sequentially modified through distinct carbon-based double coating. These novel architectures take unique advantages of mesopores acting as space to accommodate volume expansion during cycling, while the conformal carbon layer on each nanoparticle buffering volume changes, and conductive RGO sheets connect the aggregates to each other. Consequently, the RGO/C/ZnO exhibits superior electrochemical performance, including remarkably prolonged cycle life and excellent rate capability. Such improved performance of RGO/C/ZnO may be attributed to synergistic effects of both the 3-D porous nanostructures and RGO/C double coating. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/s11671-015-0902-7) contains supplementary material, which is available to authorized users. Springer US 2015-05-01 /pmc/articles/PMC4422825/ /pubmed/25977674 http://dx.doi.org/10.1186/s11671-015-0902-7 Text en © Wi et al.; licensee Springer. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Nano Express
Wi, Sungun
Woo, Hyungsub
Lee, Sangheon
Kang, Joonhyeon
Kim, Jaewon
An, Subin
Kim, Chohui
Nam, Seunghoon
Kim, Chunjoong
Park, Byungwoo
Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials
title Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials
title_full Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials
title_fullStr Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials
title_full_unstemmed Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials
title_short Reduced graphene oxide/carbon double-coated 3-D porous ZnO aggregates as high-performance Li-ion anode materials
title_sort reduced graphene oxide/carbon double-coated 3-d porous zno aggregates as high-performance li-ion anode materials
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4422825/
https://www.ncbi.nlm.nih.gov/pubmed/25977674
http://dx.doi.org/10.1186/s11671-015-0902-7
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