Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes
Pseudocapacitive materials, such as binary metal sulfides, show great promise as electrode candidates for energy storage devices due to their higher specific capacitance than that of mono-metal sulfides and binary metal oxides, but generally suffer from low energy densities when assembled in superca...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2016
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| Online Access: | https://hdl.handle.net/10356/81151 http://hdl.handle.net/10220/40670 |
| _version_ | 1826129360280616960 |
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| author | Cai, Xiaoyi Reinack, Varghese Hansen Zhang, Lili Li, Baosheng Poh, Chee Kok Lim, San Hua Chen, Luwei Yang, Jinglei Lai, Linfei Lin, Jianyi Shen, Zexiang |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Cai, Xiaoyi Reinack, Varghese Hansen Zhang, Lili Li, Baosheng Poh, Chee Kok Lim, San Hua Chen, Luwei Yang, Jinglei Lai, Linfei Lin, Jianyi Shen, Zexiang |
| author_sort | Cai, Xiaoyi |
| collection | NTU |
| description | Pseudocapacitive materials, such as binary metal sulfides, show great promise as electrode candidates for energy storage devices due to their higher specific capacitance than that of mono-metal sulfides and binary metal oxides, but generally suffer from low energy densities when assembled in supercapacitor devices. To push the energy density limit of pseudocapacitive materials in devices, a new class of electrode materials with favorable architectures is strongly needed. Here, rationally designed and coaxially grown Ni–Co–S and polypyrrole on vertically aligned carbon nanotube (VA-CNT) arrays/3D carbon fiber paper (CFP) is presented as a novel freestanding electrode for energy storage devices. Our study has revealed that the catalyst preparation is the key step and the presence of an Al2O3 buffer layer is essential for the growth of VA-CNTs. The 3D hierarchical VA-CNTs/CFP allows high areal loading and high utilization efficiency of the active materials. The binder-free asymmetric energy storage devices with Ni–Co–S/VA-CNTs/CFP as the positive electrode and polypyrrole/VA-CNTs/CFP as the negative electrode, respectively, demonstrate a high energy density of 82 W h kg−1 at 200 W kg−1. |
| first_indexed | 2024-10-01T07:39:18Z |
| format | Journal Article |
| id | ntu-10356/81151 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:39:18Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/811512022-07-27T00:43:57Z Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes Cai, Xiaoyi Reinack, Varghese Hansen Zhang, Lili Li, Baosheng Poh, Chee Kok Lim, San Hua Chen, Luwei Yang, Jinglei Lai, Linfei Lin, Jianyi Shen, Zexiang School of Civil and Environmental Engineering School of Mechanical and Aerospace Engineering School of Physical and Mathematical Sciences Energy Research Institute @ NTU (ERI@N) Mechanical and Aerospace Engineering Pseudocapacitive materials, such as binary metal sulfides, show great promise as electrode candidates for energy storage devices due to their higher specific capacitance than that of mono-metal sulfides and binary metal oxides, but generally suffer from low energy densities when assembled in supercapacitor devices. To push the energy density limit of pseudocapacitive materials in devices, a new class of electrode materials with favorable architectures is strongly needed. Here, rationally designed and coaxially grown Ni–Co–S and polypyrrole on vertically aligned carbon nanotube (VA-CNT) arrays/3D carbon fiber paper (CFP) is presented as a novel freestanding electrode for energy storage devices. Our study has revealed that the catalyst preparation is the key step and the presence of an Al2O3 buffer layer is essential for the growth of VA-CNTs. The 3D hierarchical VA-CNTs/CFP allows high areal loading and high utilization efficiency of the active materials. The binder-free asymmetric energy storage devices with Ni–Co–S/VA-CNTs/CFP as the positive electrode and polypyrrole/VA-CNTs/CFP as the negative electrode, respectively, demonstrate a high energy density of 82 W h kg−1 at 200 W kg−1. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2016-06-13T08:49:31Z 2019-12-06T14:22:29Z 2016-06-13T08:49:31Z 2019-12-06T14:22:29Z 2015 2015 Journal Article Cai, X., Reinack, V. H., Zhang, L., Li, B., Poh, C. K., Lim, S. H., et al. (2015). Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes. Journal of Materials Chemistry A, 3(44), 22043-22052. 2050-7488 https://hdl.handle.net/10356/81151 http://hdl.handle.net/10220/40670 10.1039/C5TA05961E 189554 en Journal of Materials Chemistry A © 2015 Royal Society of Chemistry. |
| spellingShingle | Mechanical and Aerospace Engineering Cai, Xiaoyi Reinack, Varghese Hansen Zhang, Lili Li, Baosheng Poh, Chee Kok Lim, San Hua Chen, Luwei Yang, Jinglei Lai, Linfei Lin, Jianyi Shen, Zexiang Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes |
| title | Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes |
| title_full | Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes |
| title_fullStr | Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes |
| title_full_unstemmed | Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes |
| title_short | Binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays/carbon fiber paper as high-performance electrodes |
| title_sort | binary metal sulfides and polypyrrole on vertically aligned carbon nanotube arrays carbon fiber paper as high performance electrodes |
| topic | Mechanical and Aerospace Engineering |
| url | https://hdl.handle.net/10356/81151 http://hdl.handle.net/10220/40670 |
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