Facile preparation of composite electrodes for supercapacitors by CNT entrapment into carbon matrix derived from pitch at a softening point
| Autor: | Kwang Chul Roh, Joah Han, Jae Chul Kim, Ji Su Chae |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
Materials science Softening point Composite number chemistry.chemical_element 02 engineering and technology General Chemistry Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention chemistry law Electrode medicine Gravimetric analysis General Materials Science Composite material 0210 nano-technology Carbon Activated carbon medicine.drug |
| Zdroj: | Carbon. 163:402-407 |
| ISSN: | 0008-6223 |
| DOI: | 10.1016/j.carbon.2020.03.033 |
| Popis: | We propose a facile route to fabricate carbon nanotube-activated carbon composite electrodes for supercapacitor applications. The crux of our approach lies in the use of softened pitch that becomes viscous at 110 °C and combines effortlessly with multi-walled carbon nanotubes, allowing a one-pot chemical activation at 900 °C. Meso/macroscale pores created by a bundle of the nanotubes can be infiltrated effectively by the softened pitch, increasing the apparent tap density with microporosity. This composite electrode leverages the high electron conductivity of percolated multi-walled carbon nanotubes and the large surface area of activated carbon, leading to high gravimetric (11.9 Wh/kg) and volumetric energy densities (10.4 Wh/L) at 1 mA/cm2. Our method substantially simplifies the preparation of carbon nanotube-activated carbon composite materials and can be an excellent strategy to obtain practical energy storage properties at a reduced processing cost. |
| Databáze: | OpenAIRE |
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