Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors
1D hierarchical tubular MnO2 nanostructures have been prepared through a facile hydrothermal method using carbon nanofibres (CNFs) as sacrificial template. The morphology of MnO2 nanostructures can be adjusted by changing the reaction time or annealing process. Polycrystalline MnO2 nanotubes are for...
| Main Authors: | , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/96383 http://hdl.handle.net/10220/10269 |
| _version_ | 1824455336412577792 |
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| author | Zhu, Jixin Shi, Wenhui Xiao, Ni Rui, Xianhong Tan, Huiteng Lu, Xuehong Hng, Huey Hoon Ma, Jan Yan, Qingyu |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Zhu, Jixin Shi, Wenhui Xiao, Ni Rui, Xianhong Tan, Huiteng Lu, Xuehong Hng, Huey Hoon Ma, Jan Yan, Qingyu |
| author_sort | Zhu, Jixin |
| collection | NTU |
| description | 1D hierarchical tubular MnO2 nanostructures have been prepared through a facile hydrothermal method using carbon nanofibres (CNFs) as sacrificial template. The morphology of MnO2 nanostructures can be adjusted by changing the reaction time or annealing process. Polycrystalline MnO2 nanotubes are formed with a short reaction time (e.g., 10 min) while hierarchical tubular MnO2 nanostructures composed of assembled nanosheets are obtained at longer reaction times (>45 min). The polycrystalline MnO2 nanotubes can be further converted to porous nanobelts and sponge-like nanowires by annealing in air. Among all the types of MnO2 nanostructures prepared, tubular MnO2 nanostructures composed of assembled nanosheets show optimized charge storage performance when tested as supercapacitor electrodes, for example, delivering an power density of 13.33 kW·kg–1 and a energy density of 21.1 Wh·kg–1 with a long cycling life over 3000 cycles, which is mainly related to their features of large specific surface area and optimized charge transfer pathway. |
| first_indexed | 2025-02-19T03:36:35Z |
| format | Journal Article |
| id | ntu-10356/96383 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:36:35Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/963832020-06-01T10:21:15Z Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors Zhu, Jixin Shi, Wenhui Xiao, Ni Rui, Xianhong Tan, Huiteng Lu, Xuehong Hng, Huey Hoon Ma, Jan Yan, Qingyu School of Materials Science & Engineering 1D hierarchical tubular MnO2 nanostructures have been prepared through a facile hydrothermal method using carbon nanofibres (CNFs) as sacrificial template. The morphology of MnO2 nanostructures can be adjusted by changing the reaction time or annealing process. Polycrystalline MnO2 nanotubes are formed with a short reaction time (e.g., 10 min) while hierarchical tubular MnO2 nanostructures composed of assembled nanosheets are obtained at longer reaction times (>45 min). The polycrystalline MnO2 nanotubes can be further converted to porous nanobelts and sponge-like nanowires by annealing in air. Among all the types of MnO2 nanostructures prepared, tubular MnO2 nanostructures composed of assembled nanosheets show optimized charge storage performance when tested as supercapacitor electrodes, for example, delivering an power density of 13.33 kW·kg–1 and a energy density of 21.1 Wh·kg–1 with a long cycling life over 3000 cycles, which is mainly related to their features of large specific surface area and optimized charge transfer pathway. 2013-06-12T07:02:15Z 2019-12-06T19:29:43Z 2013-06-12T07:02:15Z 2019-12-06T19:29:43Z 2012 2012 Journal Article Zhu, J., Shi, W., Xiao, N., Rui, X., Tan, H., Lu, X., et.al. (2012). Oxidation-Etching Preparation of MnO2 Tubular Nanostructures for High-Performance Supercapacitors. ACS Applied Materials & Interfaces, 4(5), 2769-2774. 1944-8244 https://hdl.handle.net/10356/96383 http://hdl.handle.net/10220/10269 10.1021/am300388u en ACS applied materials & interfaces © 2012 American Chemical Society. |
| spellingShingle | Zhu, Jixin Shi, Wenhui Xiao, Ni Rui, Xianhong Tan, Huiteng Lu, Xuehong Hng, Huey Hoon Ma, Jan Yan, Qingyu Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors |
| title | Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors |
| title_full | Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors |
| title_fullStr | Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors |
| title_full_unstemmed | Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors |
| title_short | Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors |
| title_sort | oxidation etching preparation of mno2 tubular nanostructures for high performance supercapacitors |
| url | https://hdl.handle.net/10356/96383 http://hdl.handle.net/10220/10269 |
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