Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes
In this paper, we report graphene nanoscrolls bridged by crumpled graphene nanosheets as an effective conductive framework for confining SnS2 nanosheets for lithium-ion battery (LIB) applications. The nanoscroll/nanosheet hybrid aerogels (GNAs) with confined SnS2 nanosheets are facilely prepared via...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2018
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| Online Access: | https://hdl.handle.net/10356/89374 http://hdl.handle.net/10220/44903 |
| _version_ | 1824455293655842816 |
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| author | Zhang, Youfang Zhao, Chenyang Zeng, Zhihui Ang, Jia Ming Che, Boyang Wang, Zhe Lu, Xuehong |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Zhang, Youfang Zhao, Chenyang Zeng, Zhihui Ang, Jia Ming Che, Boyang Wang, Zhe Lu, Xuehong |
| author_sort | Zhang, Youfang |
| collection | NTU |
| description | In this paper, we report graphene nanoscrolls bridged by crumpled graphene nanosheets as an effective conductive framework for confining SnS2 nanosheets for lithium-ion battery (LIB) applications. The nanoscroll/nanosheet hybrid aerogels (GNAs) with confined SnS2 nanosheets are facilely prepared via fast quenching, freeze-drying and thermal annealing. During quenching, wrapping SnS2 nanosheets in the nanoscrolls and bridging the one-dimensional nanoscrolls by the two-dimensional nanosheets occur simultaneously, and the ratio of nanoscrolls/nanosheets can be controlled by simply adjusting quenching conditions. The optimized SnS2/GNA is highly porous with a large specific surface area of 127.1 m2 g−1 and multi-scale pore structure, which can effectively prevent SnS2 aggregation to provide abundant lithiation/delithiation sites, and buffer volumetric change and pulverization of SnS2 nanosheets. Moreover, the three-dimensional conductive network formed in the hybrid aerogels can remarkably improve its electrical conductivity while providing sufficient channels for the transportation of lithium ions and charges. As a result, the optimized SnS2/GNA nanocomposite exhibits enhanced electrochemical performance with a high initial reversible capacity (1514.8 mAh g−1 at 0.1 A g−1), excellent rate capacity (665.4 mAh g−1 at 5 A g−1) and good cyclic stability (1050 mA h g-1 at the 50th cycle). This may provide an efficient generic approach for encapsulation of transition metal dichalcogenide materials in conductive nano/micro confined spaces for fabrication of high-performance LIB anodes. |
| first_indexed | 2025-02-19T03:35:54Z |
| format | Journal Article |
| id | ntu-10356/89374 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:35:54Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/893742023-07-14T15:52:31Z Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes Zhang, Youfang Zhao, Chenyang Zeng, Zhihui Ang, Jia Ming Che, Boyang Wang, Zhe Lu, Xuehong School of Materials Science & Engineering Graphene Nanoscrolls Transition Metal Dichalcogenide In this paper, we report graphene nanoscrolls bridged by crumpled graphene nanosheets as an effective conductive framework for confining SnS2 nanosheets for lithium-ion battery (LIB) applications. The nanoscroll/nanosheet hybrid aerogels (GNAs) with confined SnS2 nanosheets are facilely prepared via fast quenching, freeze-drying and thermal annealing. During quenching, wrapping SnS2 nanosheets in the nanoscrolls and bridging the one-dimensional nanoscrolls by the two-dimensional nanosheets occur simultaneously, and the ratio of nanoscrolls/nanosheets can be controlled by simply adjusting quenching conditions. The optimized SnS2/GNA is highly porous with a large specific surface area of 127.1 m2 g−1 and multi-scale pore structure, which can effectively prevent SnS2 aggregation to provide abundant lithiation/delithiation sites, and buffer volumetric change and pulverization of SnS2 nanosheets. Moreover, the three-dimensional conductive network formed in the hybrid aerogels can remarkably improve its electrical conductivity while providing sufficient channels for the transportation of lithium ions and charges. As a result, the optimized SnS2/GNA nanocomposite exhibits enhanced electrochemical performance with a high initial reversible capacity (1514.8 mAh g−1 at 0.1 A g−1), excellent rate capacity (665.4 mAh g−1 at 5 A g−1) and good cyclic stability (1050 mA h g-1 at the 50th cycle). This may provide an efficient generic approach for encapsulation of transition metal dichalcogenide materials in conductive nano/micro confined spaces for fabrication of high-performance LIB anodes. ASTAR (Agency for Sci., Tech. and Research, S’pore) Accepted version 2018-05-30T05:08:17Z 2019-12-06T17:24:05Z 2018-05-30T05:08:17Z 2019-12-06T17:24:05Z 2018 Journal Article Zhang, Y., Zhao, C., Zeng, Z., Ang, J. M., Che, B., Wang, Z., et al. (2018). Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes. Electrochimica Acta, 278, 156-164. 0013-4686 https://hdl.handle.net/10356/89374 http://hdl.handle.net/10220/44903 10.1016/j.electacta.2018.05.031 en Electrochimica Acta © 2018 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Electrochimica Acta, Elsevier Ltd. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.electacta.2018.05.031]. 36 p. application/pdf |
| spellingShingle | Graphene Nanoscrolls Transition Metal Dichalcogenide Zhang, Youfang Zhao, Chenyang Zeng, Zhihui Ang, Jia Ming Che, Boyang Wang, Zhe Lu, Xuehong Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes |
| title | Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes |
| title_full | Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes |
| title_fullStr | Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes |
| title_full_unstemmed | Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes |
| title_short | Graphene nanoscroll/nanosheet aerogels with confined SnS 2 nanosheets : simultaneous wrapping and bridging for high-performance lithium-ion battery anodes |
| title_sort | graphene nanoscroll nanosheet aerogels with confined sns 2 nanosheets simultaneous wrapping and bridging for high performance lithium ion battery anodes |
| topic | Graphene Nanoscrolls Transition Metal Dichalcogenide |
| url | https://hdl.handle.net/10356/89374 http://hdl.handle.net/10220/44903 |
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