Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for Supercapacitor
Vacancy engineering effectively modulates the electronic properties of electrode materials, thereby improving their electrochemical performance. In this study, we prepared selenium-deficient NiCo<sub>2</sub>Se<sub>4</sub> (Se<sub>v</sub>-NCS) using ethylene glycol...
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MDPI AG
2024-09-01
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| Series: | Molecules |
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| author | Jianjian Fu Lei Li Qian Xue Lindong Li Zhiying Guo Lanxiang Meng Changwei Lai Yao Guo |
| author_facet | Jianjian Fu Lei Li Qian Xue Lindong Li Zhiying Guo Lanxiang Meng Changwei Lai Yao Guo |
| author_sort | Jianjian Fu |
| collection | DOAJ |
| description | Vacancy engineering effectively modulates the electronic properties of electrode materials, thereby improving their electrochemical performance. In this study, we prepared selenium-deficient NiCo<sub>2</sub>Se<sub>4</sub> (Se<sub>v</sub>-NCS) using ethylene glycol as a reducing agent in NaOH alkaline environment, and investigated its potential as an electrode material for supercapacitors. Both theoretical and experimental results confirmed that the introduction of vacancies altered the morphology and electronic structure of NiCo<sub>2</sub>Se<sub>4</sub>, which in turn synergistically improved the conductivity and the diffusion capability of electrolyte ions. The optimized Se<sub>v</sub>-NCS electrode achieved an excellent specific capacitance of 2962.7 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> and superior cycling stability with a capacitance retention of 89.5% even after 10,000 cycles. Furthermore, an asymmetric device composed of the optimized Se<sub>v</sub>-NCS electrode as the positive electrode and activated carbon as the negative electrode achieved an energy density of 55.6 Wh kg<sup>−1</sup> at a power density of 800 W kg<sup>−1</sup>. Therefore, this work offers novel insights into the role of vacancy engineering in improving the performance of transition metal compound-based electrode materials for supercapacitor. |
| format | Article |
| id | doaj-art-08d0819802374a87b4487f7b9aee8cea |
| institution | OA Journals |
| issn | 1420-3049 |
| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
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| spelling | doaj-art-08d0819802374a87b4487f7b9aee8cea2025-08-20T02:16:54ZengMDPI AGMolecules1420-30492024-09-012919458010.3390/molecules29194580Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for SupercapacitorJianjian Fu0Lei Li1Qian Xue2Lindong Li3Zhiying Guo4Lanxiang Meng5Changwei Lai6Yao Guo7Henan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, ChinaSchool of Physics and Electrical Engineering, Anyang Normal University, Anyang 455000, ChinaHenan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, ChinaSchool of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, ChinaSchool of Chemical and Environmental Engineering, Anyang Institute of Technology, Anyang 455000, ChinaHenan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, ChinaHenan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, ChinaHenan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, ChinaVacancy engineering effectively modulates the electronic properties of electrode materials, thereby improving their electrochemical performance. In this study, we prepared selenium-deficient NiCo<sub>2</sub>Se<sub>4</sub> (Se<sub>v</sub>-NCS) using ethylene glycol as a reducing agent in NaOH alkaline environment, and investigated its potential as an electrode material for supercapacitors. Both theoretical and experimental results confirmed that the introduction of vacancies altered the morphology and electronic structure of NiCo<sub>2</sub>Se<sub>4</sub>, which in turn synergistically improved the conductivity and the diffusion capability of electrolyte ions. The optimized Se<sub>v</sub>-NCS electrode achieved an excellent specific capacitance of 2962.7 F g<sup>−1</sup> at a current density of 1 A g<sup>−1</sup> and superior cycling stability with a capacitance retention of 89.5% even after 10,000 cycles. Furthermore, an asymmetric device composed of the optimized Se<sub>v</sub>-NCS electrode as the positive electrode and activated carbon as the negative electrode achieved an energy density of 55.6 Wh kg<sup>−1</sup> at a power density of 800 W kg<sup>−1</sup>. Therefore, this work offers novel insights into the role of vacancy engineering in improving the performance of transition metal compound-based electrode materials for supercapacitor.https://www.mdpi.com/1420-3049/29/19/4580vacancy engineeringNiCo<sub>2</sub>Se<sub>4</sub>supercapacitorelectrochemical properties |
| spellingShingle | Jianjian Fu Lei Li Qian Xue Lindong Li Zhiying Guo Lanxiang Meng Changwei Lai Yao Guo Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for Supercapacitor Molecules vacancy engineering NiCo<sub>2</sub>Se<sub>4</sub> supercapacitor electrochemical properties |
| title | Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for Supercapacitor |
| title_full | Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for Supercapacitor |
| title_fullStr | Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for Supercapacitor |
| title_full_unstemmed | Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for Supercapacitor |
| title_short | Vacancy Engineering of Selenium-Vacant NiCo<sub>2</sub>Se<sub>4</sub> with Enhanced Electrochemical Performance for Supercapacitor |
| title_sort | vacancy engineering of selenium vacant nico sub 2 sub se sub 4 sub with enhanced electrochemical performance for supercapacitor |
| topic | vacancy engineering NiCo<sub>2</sub>Se<sub>4</sub> supercapacitor electrochemical properties |
| url | https://www.mdpi.com/1420-3049/29/19/4580 |
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