Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors
Copper tin sulfides (CTSs) have widely been investigated as electrode materials for supercapacitors owing to their high theoretical pseudocapacitances. However, the poor intrinsic conductivity and volume change during redox reactions hindered their electrochemical performances and broad applications...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/6109758 |
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| author | Zhen Bi Lanyan Huang Chaoqun Shang Xin Wang Guofu Zhou |
| author_facet | Zhen Bi Lanyan Huang Chaoqun Shang Xin Wang Guofu Zhou |
| author_sort | Zhen Bi |
| collection | DOAJ |
| description | Copper tin sulfides (CTSs) have widely been investigated as electrode materials for supercapacitors owing to their high theoretical pseudocapacitances. However, the poor intrinsic conductivity and volume change during redox reactions hindered their electrochemical performances and broad applications. In this study, carbon quantum dots (CQDs) were employed to modify CTSs. The structures and morphologies of obtained materials were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD revealed CTSs were composed of Cu2SnS3 and Cu4SnS4, and TEM suggested the decoration of CQDs on the surface of CTSs. With the decoration of CQDs, CTSs@CQDs showed a remarkable specific capacitance of 856 F·g−1 at 2 mV·s−1 and a high rate capability of 474 F·g−1 at 50 mV·s−1, which were superior to those of CTSs (851 F·g−1 at 2 mV·s−1 and 192 F·g−1 at 50 mV·s−1, respectively). This was mainly ascribed to incorporation of carbon quantum dots, which improved the electrical conductivity and alleviated volume change of CTSs during charge/discharge processes. |
| format | Article |
| id | doaj-art-b5b11074947e4b16a1bd890e110e753d |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-b5b11074947e4b16a1bd890e110e753d2025-02-03T07:25:51ZengWileyJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/61097586109758Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved SupercapacitorsZhen Bi0Lanyan Huang1Chaoqun Shang2Xin Wang3Guofu Zhou4National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaNational Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou 510006, ChinaCopper tin sulfides (CTSs) have widely been investigated as electrode materials for supercapacitors owing to their high theoretical pseudocapacitances. However, the poor intrinsic conductivity and volume change during redox reactions hindered their electrochemical performances and broad applications. In this study, carbon quantum dots (CQDs) were employed to modify CTSs. The structures and morphologies of obtained materials were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD revealed CTSs were composed of Cu2SnS3 and Cu4SnS4, and TEM suggested the decoration of CQDs on the surface of CTSs. With the decoration of CQDs, CTSs@CQDs showed a remarkable specific capacitance of 856 F·g−1 at 2 mV·s−1 and a high rate capability of 474 F·g−1 at 50 mV·s−1, which were superior to those of CTSs (851 F·g−1 at 2 mV·s−1 and 192 F·g−1 at 50 mV·s−1, respectively). This was mainly ascribed to incorporation of carbon quantum dots, which improved the electrical conductivity and alleviated volume change of CTSs during charge/discharge processes.http://dx.doi.org/10.1155/2019/6109758 |
| spellingShingle | Zhen Bi Lanyan Huang Chaoqun Shang Xin Wang Guofu Zhou Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors Journal of Chemistry |
| title | Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors |
| title_full | Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors |
| title_fullStr | Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors |
| title_full_unstemmed | Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors |
| title_short | Stable Copper Tin Sulfide Nanoflower Modified Carbon Quantum Dots for Improved Supercapacitors |
| title_sort | stable copper tin sulfide nanoflower modified carbon quantum dots for improved supercapacitors |
| url | http://dx.doi.org/10.1155/2019/6109758 |
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