In:
Nano, World Scientific Pub Co Pte Ltd, Vol. 14, No. 06 ( 2019-06), p. 1950074-
Abstract:
Carbon nanotubes (CNTs) were welded on the surface of thermoplastic polypropylene (PP) substrate by laser irradiation and then manganese dioxide (MnO 2 ) was deposited on the surface of CNTs by electrochemical method to prepare CNTs/MnO 2 flexible electrodes (L-CM). The microstructure and morphology of CNTs/MnO 2 composites were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). The results showed that CNTs were welded on the surface of the substrate, adhering to each other to form a porous network structure. In addition, there were distinct small protrusions on the surface of CNTs, indicating that MnO 2 had been successfully deposited on the surface of CNTs. Cyclic voltammogram (CV), galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS) techniques were employed to investigate the electrochemical performance of the composites. Compared with CNTs/MnO 2 composite prepared via compaction (denoted as C-CM), L-CM composite prepared under the laser power of 0.75[Formula: see text]W (denoted as L-CM75) showed a larger capacitance of 214.6[Formula: see text] F[Formula: see text]g[Formula: see text] at the current density of 0.5[Formula: see text]A[Formula: see text] g[Formula: see text] and displayed excellent bendability, demonstrating capacitance retention of approximately 89.6% after 1000 bending cycles. The excellent performance of L-CM75 may be attributed to the fact that the CNTs welded on the substrate have formed an effective conductive network whose porous structure can facilitate easy access of electrolytes to the electrode, which results in enhancement of the electrochemical performance of L-CM75.
Type of Medium:
Online Resource
ISSN:
1793-2920
,
1793-7094
DOI:
10.1142/S1793292019500747
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2019
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