Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability
Copper oxide nanofilms can be fabricated on Cu foam by a simple electrochemical anodization process. However, it is difficult to obtain single-phase nanofilms that consist only of Cu2O or CuO. In this work, we present a modified anodization process that includes (NH4)6Mo7O24·4H2O in the electrolyte...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/85302 http://hdl.handle.net/10220/49194 |
| _version_ | 1826127515823898624 |
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| author | Shu, Xia Wang, Yan Cui, Jiewu Xu, Guanqing Zhang, Jianfang Yang, Wanfen Xiao, Mingfeng Zheng, Hongmei Qin, Yongqiang Zhang, Yong Chen, Zhong Wu, Yucheng |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Shu, Xia Wang, Yan Cui, Jiewu Xu, Guanqing Zhang, Jianfang Yang, Wanfen Xiao, Mingfeng Zheng, Hongmei Qin, Yongqiang Zhang, Yong Chen, Zhong Wu, Yucheng |
| author_sort | Shu, Xia |
| collection | NTU |
| description | Copper oxide nanofilms can be fabricated on Cu foam by a simple electrochemical anodization process. However, it is difficult to obtain single-phase nanofilms that consist only of Cu2O or CuO. In this work, we present a modified anodization process that includes (NH4)6Mo7O24·4H2O in the electrolyte solution, and prepare single-phase CuO nanofilms grown directly on Cu foam. The surface morphologies of the CuO nanofilms are greatly dependent on the concentration of (NH4)6Mo7O24·4H2O included in the electrolyte solution during the anodization process, and accordingly present nanodots, nanoflakes, nanosheets, and/or nanobelts. The synthesis mechanism for CuO nanofilms is discussed in detail. The as-fabricated single-phase CuO nanofilms can be directly employed as electrodes that exhibit good supercapacitive performance, with an areal capacitance greater than 600 mF cm-2 at a current density of 1 mA cm−2 in a 2 M KOH aqueous solution. Moreover, the single-phase CuO nanofilm electrodes also demonstrate excellent long term cycling stability with about 94% retention of the initial areal capacitance after 10,000 charge/discharge cycles. The results demonstrate that the CuO nanofilms prepared on Cu foam by our modified anodization process are promising electrode materials for high-performance flexible supercapacitors. |
| first_indexed | 2024-10-01T07:10:08Z |
| format | Journal Article |
| id | ntu-10356/85302 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:10:08Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/853022020-06-01T10:26:33Z Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability Shu, Xia Wang, Yan Cui, Jiewu Xu, Guanqing Zhang, Jianfang Yang, Wanfen Xiao, Mingfeng Zheng, Hongmei Qin, Yongqiang Zhang, Yong Chen, Zhong Wu, Yucheng School of Materials Science & Engineering Ammonium Molybdate CuO Nanofilm Engineering::Materials Copper oxide nanofilms can be fabricated on Cu foam by a simple electrochemical anodization process. However, it is difficult to obtain single-phase nanofilms that consist only of Cu2O or CuO. In this work, we present a modified anodization process that includes (NH4)6Mo7O24·4H2O in the electrolyte solution, and prepare single-phase CuO nanofilms grown directly on Cu foam. The surface morphologies of the CuO nanofilms are greatly dependent on the concentration of (NH4)6Mo7O24·4H2O included in the electrolyte solution during the anodization process, and accordingly present nanodots, nanoflakes, nanosheets, and/or nanobelts. The synthesis mechanism for CuO nanofilms is discussed in detail. The as-fabricated single-phase CuO nanofilms can be directly employed as electrodes that exhibit good supercapacitive performance, with an areal capacitance greater than 600 mF cm-2 at a current density of 1 mA cm−2 in a 2 M KOH aqueous solution. Moreover, the single-phase CuO nanofilm electrodes also demonstrate excellent long term cycling stability with about 94% retention of the initial areal capacitance after 10,000 charge/discharge cycles. The results demonstrate that the CuO nanofilms prepared on Cu foam by our modified anodization process are promising electrode materials for high-performance flexible supercapacitors. 2019-07-09T03:48:50Z 2019-12-06T16:01:07Z 2019-07-09T03:48:50Z 2019-12-06T16:01:07Z 2018 Journal Article Shu, X., Wang, Y., Cui, J., Xu, G., Zhang, J., Yang, W., . . . Wu, Y. (2018). Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability. Journal of Alloys and Compounds, 753, 731-739. doi:10.1016/j.jallcom.2018.03.267 0925-8388 https://hdl.handle.net/10356/85302 http://hdl.handle.net/10220/49194 10.1016/j.jallcom.2018.03.267 en Journal of Alloys and Compounds © 2018 Elsevier B.V. All rights reserved. |
| spellingShingle | Ammonium Molybdate CuO Nanofilm Engineering::Materials Shu, Xia Wang, Yan Cui, Jiewu Xu, Guanqing Zhang, Jianfang Yang, Wanfen Xiao, Mingfeng Zheng, Hongmei Qin, Yongqiang Zhang, Yong Chen, Zhong Wu, Yucheng Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability |
| title | Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability |
| title_full | Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability |
| title_fullStr | Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability |
| title_full_unstemmed | Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability |
| title_short | Supercapacitive performance of single phase CuO nanosheet arrays with ultra-long cycling stability |
| title_sort | supercapacitive performance of single phase cuo nanosheet arrays with ultra long cycling stability |
| topic | Ammonium Molybdate CuO Nanofilm Engineering::Materials |
| url | https://hdl.handle.net/10356/85302 http://hdl.handle.net/10220/49194 |
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