Bimetal-organic framework derived Cu(NiCo)2S4/Ni3S4 electrode material with hierarchical hollow heterostructure for high performance energy storage
| Autor: | Guowen Yan, Dedong Jia, Taiwei Liu, Liang Cui, Rongkun Zheng, Yiwei Zheng, Jingquan Liu, Wei Zhao, Bingping Liu, Di Wei |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
Materials science 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance Energy storage 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Bimetal Biomaterials Colloid and Surface Chemistry Chemical engineering Electrode 0210 nano-technology Current density Power density |
| Zdroj: | Journal of Colloid and Interface Science. 565:295-304 |
| ISSN: | 0021-9797 |
| DOI: | 10.1016/j.jcis.2020.01.049 |
| Popis: | Rational design of electrical active materials with high performance for energy storage and conversion is of great significance. Herein, Cu(NiCo)2S4/Ni3S4, a three-dimensional (3D) hierarchical hollow heterostructured electrode material, is designed by etching the well-defined bimetal organic framework (MOF) via sequential in-situ ion-exchange processes. This trimetallic sulfides with unique structure provide large surface area, hierarchical pore distribution and enhanced electrical conductivity, can enrich the active sites for redox reactions, facilitate electrolyte penetration and rapid charge transfer kinetics. As a result, the Cu(NiCo)2S4/Ni3S4 electrode exhibits a high specific capacitance of 1320 F/g at 1 A/g and excellent rate performance (only 15% of capacitance is attenuated when the current density is increased by 20 times). Furthermore, a fabricated hybrid supercapacitor of Cu(NiCo)2S4/Ni3S4/AC can deliver a maximum energy density of 40.8 Wh/kg, remarkable power density of 7859.2 W/kg and superior cycling stability (85% retention of capacitance after 5000 cycles), demonstrating great potential for practical applications in energy storage and conversion devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect