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Multilayered Flexible Fibers with High Performance for Wearable Supercapacitor Applications
Author(s) -
GarciaTorres Jose,
Crean Carol
Publication year - 2018
Publication title -
advanced sustainable systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.499
H-Index - 24
ISSN - 2366-7486
DOI - 10.1002/adsu.201700143
Subject(s) - supercapacitor , materials science , capacitance , carbon nanotube , spinning , polymer , electrode , composite number , conductive polymer , fiber , composite material , carbon black , carbon fibers , electrical conductor , nanotechnology , chemistry , natural rubber
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 MnO 2 crystalline structures (ε‐MnO 2 , γ‐MnO 2 ) 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 MnO 2 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.