Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor
Porous structure and surface defects are important to improve the performance of supercapacitors. In this study, a facile pathway was developed for high-performance supercapacitors, which can produce transition metal hydroxides (LDHs) with abundant porous structure and surface defects. The NiCo-SDBS...
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MDPI AG
2022-02-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/4/1405 |
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| author | Liping Zhong Zumiao Yan Hai Wang Linjiang Wang |
| author_facet | Liping Zhong Zumiao Yan Hai Wang Linjiang Wang |
| author_sort | Liping Zhong |
| collection | DOAJ |
| description | Porous structure and surface defects are important to improve the performance of supercapacitors. In this study, a facile pathway was developed for high-performance supercapacitors, which can produce transition metal hydroxides (LDHs) with abundant porous structure and surface defects. The NiCo-SDBS-LDH was prepared by one-step hydrothermal reaction using sodium dodecylbenzene sulfonate (SDBS) as anionic surfactant. And then, three dimensional (3D) interconnected porous flower-like 3D-NiCo-SDBS-LDH microspheres were designed and synthesized using the gas-phase hydrazine hydrate reduction method. Results showed that the hydrazine hydrate reduction not only introduces a large number of pores into 3D-NiCo-SDBS-LDH microspheres and causes the formation of oxygen vacancies, but it also roughens the surface of the microspheres. All these changes contribute to the enhancement of electrochemical activity of 3D-NiCo-SDBS-LDH; the NiCo-SDBS-LDH electrode after hydrazine hydrate treatment (3D-NiCo-SDBS-LDH) exhibits a higher specific capacitance of 1148 F·g<sup>−1</sup> at 1 A·g<sup>−1</sup> (about 1.46 times larger than that of NiCo-SDBS-LDH) and excellent long cycle life with 94% retention after 4000 cycles. Moreover, the assembled 3D-NiCo-SDBS-LDH//AC (active carbon) asymmetric supercapacitor (ASC) achieves remarkable energy density of 73.14 W h·kg<sup>−1</sup> at 800 W·kg<sup>−1</sup> and long-term cycling stability of 95.5% retention for up to 10,000 cycles. The outstanding electrochemical performance can be attributed to the synergy between the rich porous structure and the roughened surface that has been created by the hydrazine hydrate treatment. |
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| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:32:37Z |
| publishDate | 2022-02-01 |
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| spelling | doaj.art-9c7fb26ce3d54aac93b7fda25380e5e22023-11-23T20:52:43ZengMDPI AGMaterials1996-19442022-02-01154140510.3390/ma15041405Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance SupercapacitorLiping Zhong0Zumiao Yan1Hai Wang2Linjiang Wang3College of Material Science and Engineering, Guilin University of Technology, Guilin 541004, ChinaCollege of Material Science and Engineering, Guilin University of Technology, Guilin 541004, ChinaCollege of Physics and Technology, Guangxi Normal University, Guilin 541004, ChinaCollege of Material Science and Engineering, Guilin University of Technology, Guilin 541004, ChinaPorous structure and surface defects are important to improve the performance of supercapacitors. In this study, a facile pathway was developed for high-performance supercapacitors, which can produce transition metal hydroxides (LDHs) with abundant porous structure and surface defects. The NiCo-SDBS-LDH was prepared by one-step hydrothermal reaction using sodium dodecylbenzene sulfonate (SDBS) as anionic surfactant. And then, three dimensional (3D) interconnected porous flower-like 3D-NiCo-SDBS-LDH microspheres were designed and synthesized using the gas-phase hydrazine hydrate reduction method. Results showed that the hydrazine hydrate reduction not only introduces a large number of pores into 3D-NiCo-SDBS-LDH microspheres and causes the formation of oxygen vacancies, but it also roughens the surface of the microspheres. All these changes contribute to the enhancement of electrochemical activity of 3D-NiCo-SDBS-LDH; the NiCo-SDBS-LDH electrode after hydrazine hydrate treatment (3D-NiCo-SDBS-LDH) exhibits a higher specific capacitance of 1148 F·g<sup>−1</sup> at 1 A·g<sup>−1</sup> (about 1.46 times larger than that of NiCo-SDBS-LDH) and excellent long cycle life with 94% retention after 4000 cycles. Moreover, the assembled 3D-NiCo-SDBS-LDH//AC (active carbon) asymmetric supercapacitor (ASC) achieves remarkable energy density of 73.14 W h·kg<sup>−1</sup> at 800 W·kg<sup>−1</sup> and long-term cycling stability of 95.5% retention for up to 10,000 cycles. The outstanding electrochemical performance can be attributed to the synergy between the rich porous structure and the roughened surface that has been created by the hydrazine hydrate treatment.https://www.mdpi.com/1996-1944/15/4/1405layered double hydroxidessupercapacitorshydrazine hydratesurface defects |
| spellingShingle | Liping Zhong Zumiao Yan Hai Wang Linjiang Wang Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor Materials layered double hydroxides supercapacitors hydrazine hydrate surface defects |
| title | Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor |
| title_full | Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor |
| title_fullStr | Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor |
| title_full_unstemmed | Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor |
| title_short | Hydrazine Hydrate Induced Three-Dimensional Interconnected Porous Flower-like 3D-NiCo-SDBS-LDH Microspheres for High-Performance Supercapacitor |
| title_sort | hydrazine hydrate induced three dimensional interconnected porous flower like 3d nico sdbs ldh microspheres for high performance supercapacitor |
| topic | layered double hydroxides supercapacitors hydrazine hydrate surface defects |
| url | https://www.mdpi.com/1996-1944/15/4/1405 |
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