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Bifunctional Conducting Polymer Coated CoFe 2 O 4 Core‐Shell Nanolayer on Carbon Fiber Cloth for 2.0 V Wearable Aqueous Supercapacitors
Author(s) -
Song Kun,
Wang Xin,
Wang Jun,
Zhang Bin,
Yang Rui
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201900069
Subject(s) - supercapacitor , materials science , pedot:pss , capacitance , pseudocapacitor , electrode , power density , nanotechnology , aqueous solution , fabrication , electrochemistry , chemical engineering , conductive polymer , polymer , composite material , layer (electronics) , power (physics) , chemistry , organic chemistry , medicine , physics , alternative medicine , quantum mechanics , pathology , engineering
In recent years, a flexible supercapacitor with high storage properties, it is no longer concerned because of its low voltage window. Here, we design and synthesize CoFe 2 O 4 nanoparticles grow on Carbon Fiber Cloth (CFC) via a mild hydrothermal and spay the ultra‐conductive polymer Poly (3,4‐ ethylenedioxythiophene):poly (styrenesulfonic acid) (PEDOT:PSS) on the surface of CoFe 2 O 4 nanolayer. The as‐fabricated PEDOT:PSS /Fe 2 O 3 ‐CNTs /CFC and PEDOT:PSS/CoFe 2 O 4 /CFC electrodes as the negative and positive pseudocapacitor electrode show an excellent capacitance of 426 and 472.5 F g −1 at 1 A g −1 , respectively. An aqueous flexible asymmetric supercapacitor (AFAS) at 2.0 V and achieve well specific capacitance of 181.3 F g −1 at a current density of 1 A g −1 and the maximum energy density is 25.17 Wh kg −1 at power density of 620.7 W kg −1 . To the aqueous flexible asymmetric supercapacitor, both positive and negative electrodes are important for the electrochemical performance. The power storage capacity per unit area of two electrodes should be similar, because the area of negative and positive electrode of flexible asymmetric supercapacitor must be similarity. The advantages of AFAS, according to its low‐cost, high capacitances and simple fabrication process, show that AFAS can be one of the excellent candidate flexible asymmetric supercapacitor for next‐generation high‐performance supercapacitors.