期刊
ADVANCED SUSTAINABLE SYSTEMS
卷 2, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsu.201700143
关键词
carbon nanomaterials; conducting polymers; manganese oxides; multilayered flexible fibers; supercapacitors
资金
- Engineering and Physical Sciences Research Council (EPSRC, UK) [EP/K035002/1, EP/M022749/1]
- EPSRC [EP/K035002/1, EP/M022749/1, EP/L02263X/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K035002/1, EP/L02263X/1, EP/M022749/1] Funding Source: researchfish
Multilayered flexible fibers, consisting of carbon black-carbon nanotube fibers, manganese oxides, and conducting polymers, are fabricated for use as electrodes in supercapacitors. Carbon-based fibers are initially prepared by wet-spinning using carbon-based nanomaterials (carbon black and carbon nanotubes) and chitosan as a matrix. Subsequent coatings with manganese oxides and conducting polymers form a multilayered structure. Different MnO2 crystalline structures (epsilon-MnO2, gamma-MnO2) are grown onto the fiber by electrodeposition and different conducting polymers (polyethylenedioxythiophene and polypyrrole) used as a conductive wrapping. Each layer improves the performance of the fiber by adding different functionalities. While MnO2 improves the capacitance of the fiber, the presence of conducting polymers creates a conductive network increasing the capacitance further and conferring cycling stability. Capacitance values up 600 F g(-1) and capacitance retention of 90% can be achieved with these multilayered hybrid fibers. A symmetric supercapacitor device, prepared from two hybrid fibers, shows no significant change in properties when the device is bent, demonstrating their potential in flexible electronic devices and wearable energy systems.
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