One-step wet-spinning process of CB/CNT/MnO2 nanotubes hybrid flexible fibres as electrodes for wearable supercapacitors
| Autor: | Jose Garcia-Torres, Robert C. T. Slade, Alexander J. Roberts, Carol Crean |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Materials science General Chemical Engineering 02 engineering and technology Carbon nanotube Carbon black 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Concentration ratio Capacitance 0104 chemical sciences Nanomaterials law.invention Chemical engineering law Electrode 0210 nano-technology |
| Zdroj: | Electrochimica Acta. 296:481-490 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2018.10.201 |
| Popis: | Fibres made from different nanostructured carbons (carbon black (CB)), carbon nanotubes (CNT) and CB/CNT were successfully developed by wet-spinning. The variation of dispersion conditions (carbon nanomaterial concentration, dispersant/Carbon nanomaterial concentration ratio, CB/CNT concentration ratio, pH) resulted in different electrochemical performance for each type of fibres. Fibres with the best capacitance values (10 F g-1) and good cycling stability (89%) were obtained from fibres containing 10% carbon black and 90% carbon nanotubes. A solid-state supercapacitor was fabricated by assembling the CB/CNT fibres resulting in 9.2 F g-1 electrode capacitance. Incorporation of 0.2 wt.% birnessite-type potassium manganese oxide nanotubes dramatically increased the capacitance of the fibres up to 246 F g-1 due to the high specific capacitance of birnessite phase and the tubular nature of the nanomaterial. |
| Databáze: | OpenAIRE |
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