Insights on the fundamental capacitive behavior : a case study of MnO2
In this work, an insightful study on the fundamental capacitive behavior of MnO2 based electrodes is carried out using MnO2 hierarchical spheres (MHSs) and MnO2 nanoneedles (MNs) as examples. An overall understanding of the relationship between the capacitive performance and the electrode configurat...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/105770 http://hdl.handle.net/10220/20907 |
| _version_ | 1826115858303287296 |
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| author | Yan, Jian Sumboja, Afriyanti Wang, Xu Fu, Chaopeng Kumar, Vipin Lee, Pooi See |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Yan, Jian Sumboja, Afriyanti Wang, Xu Fu, Chaopeng Kumar, Vipin Lee, Pooi See |
| author_sort | Yan, Jian |
| collection | NTU |
| description | In this work, an insightful study on the fundamental capacitive behavior of MnO2 based electrodes is carried out using MnO2 hierarchical spheres (MHSs) and MnO2 nanoneedles (MNs) as examples. An overall understanding of the relationship between the capacitive performance and the electrode configuration as well as the morphology of active material, loading density, porosity of electrode, and electrolyte concentration is investigated comprehensively. Our analyses show that MnO2 with thin structure is of advantage to increase the utility of active material and to deliver higher specific capacitance, as the faradic reaction happens at/near the surface. Creation of an efficient path for the transport of electrons and ions is crucial to achieve high rate capabilities. Cycling stability could be improved by suppressing the side reaction. It is also important to shed light on the charge contribution from a graphite paper (GP) substrate since it may cause a misinterpretation of the capacitive behavior. This study provides a comprehensive understanding on the fundamental capacitive behavior of MnO2 based electrodes and gives useful clues for designing high performance supercapacitors. |
| first_indexed | 2024-10-01T04:01:59Z |
| format | Journal Article |
| id | ntu-10356/105770 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:01:59Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1057702020-06-01T10:13:47Z Insights on the fundamental capacitive behavior : a case study of MnO2 Yan, Jian Sumboja, Afriyanti Wang, Xu Fu, Chaopeng Kumar, Vipin Lee, Pooi See School of Materials Science & Engineering DRNTU::Engineering::Materials::Energy materials In this work, an insightful study on the fundamental capacitive behavior of MnO2 based electrodes is carried out using MnO2 hierarchical spheres (MHSs) and MnO2 nanoneedles (MNs) as examples. An overall understanding of the relationship between the capacitive performance and the electrode configuration as well as the morphology of active material, loading density, porosity of electrode, and electrolyte concentration is investigated comprehensively. Our analyses show that MnO2 with thin structure is of advantage to increase the utility of active material and to deliver higher specific capacitance, as the faradic reaction happens at/near the surface. Creation of an efficient path for the transport of electrons and ions is crucial to achieve high rate capabilities. Cycling stability could be improved by suppressing the side reaction. It is also important to shed light on the charge contribution from a graphite paper (GP) substrate since it may cause a misinterpretation of the capacitive behavior. This study provides a comprehensive understanding on the fundamental capacitive behavior of MnO2 based electrodes and gives useful clues for designing high performance supercapacitors. 2014-09-19T02:28:59Z 2019-12-06T21:57:33Z 2014-09-19T02:28:59Z 2019-12-06T21:57:33Z 2014 2014 Journal Article Yan, J., Sumboja, A., Wang, X., Fu, C., Kumar, V., & Lee, P. S. (2014). Insights on the fundamental capacitive behavior : a case study of MnO 2 . Small, 10(17), 3568-3578. 1613-6810 https://hdl.handle.net/10356/105770 http://hdl.handle.net/10220/20907 10.1002/smll.201303553 en Small © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| spellingShingle | DRNTU::Engineering::Materials::Energy materials Yan, Jian Sumboja, Afriyanti Wang, Xu Fu, Chaopeng Kumar, Vipin Lee, Pooi See Insights on the fundamental capacitive behavior : a case study of MnO2 |
| title | Insights on the fundamental capacitive behavior : a case study of MnO2 |
| title_full | Insights on the fundamental capacitive behavior : a case study of MnO2 |
| title_fullStr | Insights on the fundamental capacitive behavior : a case study of MnO2 |
| title_full_unstemmed | Insights on the fundamental capacitive behavior : a case study of MnO2 |
| title_short | Insights on the fundamental capacitive behavior : a case study of MnO2 |
| title_sort | insights on the fundamental capacitive behavior a case study of mno2 |
| topic | DRNTU::Engineering::Materials::Energy materials |
| url | https://hdl.handle.net/10356/105770 http://hdl.handle.net/10220/20907 |
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