Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor
The electrochemical performance of an energy conversion and storage device like the supercapacitor mainly depends on the microstructure and morphology of the electrodes. In this paper, to improve the capacitance performance of the supercapacitor, the all-pseudocapacitive electrodes of lamella-like B...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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The Royal Society
2018-01-01
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| Series: | Royal Society Open Science |
| Subjects: | |
| Online Access: | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171186 |
| _version_ | 1818400973707542528 |
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| author | Guofu Ma Fengting Hua Kanjun Sun Enke Fenga Hui Peng Zhiguo Zhang Ziqiang Lei |
| author_facet | Guofu Ma Fengting Hua Kanjun Sun Enke Fenga Hui Peng Zhiguo Zhang Ziqiang Lei |
| author_sort | Guofu Ma |
| collection | DOAJ |
| description | The electrochemical performance of an energy conversion and storage device like the supercapacitor mainly depends on the microstructure and morphology of the electrodes. In this paper, to improve the capacitance performance of the supercapacitor, the all-pseudocapacitive electrodes of lamella-like Bi18SeO29/BiSe as the negative electrode and flower-like Co0.85Se nanosheets as the positive electrode are synthesized by using a facile low-temperature one-step hydrothermal method. The microstructures and morphology of the electrode materials are carefully characterized, and the capacitance performances are also tested. The Bi18SeO29/BiSe and Co0.85Se have high specific capacitance (471.3 F g–1 and 255 F g–1 at 0.5 A g–1), high conductivity, outstanding cycling stability, as well as good rate capability. The assembled asymmetric supercapacitor completely based on the pseudocapacitive electrodes exhibits outstanding cycling stability (about 93% capacitance retention after 5000 cycles). Moreover, the devices exhibit high energy density of 24.2 Wh kg–1 at a power density of 871.2 W kg–1 in the voltage window of 0–1.6 V with 2 M KOH solution. |
| first_indexed | 2024-12-14T07:45:05Z |
| format | Article |
| id | doaj.art-dcd19ede10f440318ffe4a216a9a6a59 |
| institution | Directory Open Access Journal |
| issn | 2054-5703 |
| language | English |
| last_indexed | 2024-12-14T07:45:05Z |
| publishDate | 2018-01-01 |
| publisher | The Royal Society |
| record_format | Article |
| series | Royal Society Open Science |
| spelling | doaj.art-dcd19ede10f440318ffe4a216a9a6a592022-12-21T23:10:54ZengThe Royal SocietyRoyal Society Open Science2054-57032018-01-015110.1098/rsos.171186171186Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitorGuofu MaFengting HuaKanjun SunEnke FengaHui PengZhiguo ZhangZiqiang LeiThe electrochemical performance of an energy conversion and storage device like the supercapacitor mainly depends on the microstructure and morphology of the electrodes. In this paper, to improve the capacitance performance of the supercapacitor, the all-pseudocapacitive electrodes of lamella-like Bi18SeO29/BiSe as the negative electrode and flower-like Co0.85Se nanosheets as the positive electrode are synthesized by using a facile low-temperature one-step hydrothermal method. The microstructures and morphology of the electrode materials are carefully characterized, and the capacitance performances are also tested. The Bi18SeO29/BiSe and Co0.85Se have high specific capacitance (471.3 F g–1 and 255 F g–1 at 0.5 A g–1), high conductivity, outstanding cycling stability, as well as good rate capability. The assembled asymmetric supercapacitor completely based on the pseudocapacitive electrodes exhibits outstanding cycling stability (about 93% capacitance retention after 5000 cycles). Moreover, the devices exhibit high energy density of 24.2 Wh kg–1 at a power density of 871.2 W kg–1 in the voltage window of 0–1.6 V with 2 M KOH solution.https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171186bi18seo29/biseco0.85seasymmetric supercapacitor |
| spellingShingle | Guofu Ma Fengting Hua Kanjun Sun Enke Fenga Hui Peng Zhiguo Zhang Ziqiang Lei Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor Royal Society Open Science bi18seo29/bise co0.85se asymmetric supercapacitor |
| title | Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor |
| title_full | Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor |
| title_fullStr | Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor |
| title_full_unstemmed | Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor |
| title_short | Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor |
| title_sort | nanostructure selenium compounds as pseudocapacitive electrodes for high performance asymmetric supercapacitor |
| topic | bi18seo29/bise co0.85se asymmetric supercapacitor |
| url | https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.171186 |
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