The synthesis and electrochemical performance of core-shell structured Ni-Al layered double hydroxide/carbon nanotubes composites
| Autor: | Jijun Zhang, Yan Wang, Lifa Ni, Jiang Kun, Xinyu Yan, Dong Xiang, Daniel den Engelsen, Zexiang Chen, Li Hai |
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| Rok vydání: | 2016 |
| Předmět: |
Fabrication
General Chemical Engineering Composite number 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Electrode Nano Hydroxide Composite material 0210 nano-technology Current density |
| Zdroj: | Electrochimica Acta. 222:185-193 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2016.09.073 |
| Popis: | We report a fabrication of nano-flakes consisting of Ni-Al layered double hydroxide grown on functionalized carbon nanotube bundles by a hydrothermal method for energy storage application. This nano-flake structure is denoted as Ni-Al LDH/CNTs. The morphology characterization indicates that the composite displays a three-dimensional architecture with a well-defined core-shell configuration and large surface area. Due to its unique core-shell structure, the Ni-Al LDH/CNTs electrode with a mass loading of 50 mg/cm 2 reaches a high electrochemical performance of 1017C/g (the corresponding area-normalized capacity is 50.85C/cm 2 ) at a current density of 1 A/g, and excellent rate performance (remains 85% when the current density increases to 10 A/g). Furthermore, the composite exhibits good behavior during life testing with a decrease of the specific capacity of 88% after 1000 cycle tests at a current density of 2 A/g, indicating the composite has adequate high-current electrochemical behavior. The attractive electrochemical performance of this Ni-Al LDH/CNTs illustrates its unique advantage for energy storage systems. In addition, the rational design demonstrated here a blueprint for a cheap synthesis of a CNTs-based three-dimensional nano core-shell structure. |
| Databáze: | OpenAIRE |
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