Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (02): 74-80.doi: 10.13475/j.fzxb.20211102607

• Fiber Materials • Previous Articles     Next Articles

Preparation and properties of polyaniline/Ti3C2Tx/carbon nanotube composite fiber-based electrodes

GUO Zijiao, LI Yue, ZHANG Rui, LU Zan()   

  1. School of Textiles and Fashion, Shanghai University of Engineering Science, Shanghai 201620, China
  • Received:2021-11-03 Revised:2021-12-06 Online:2022-02-15 Published:2022-03-15
  • Contact: LU Zan E-mail:zanlu659@sues.edu.cn

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Abstract:

In order to prepare portable, one-dimensional fiber supercapacitors with required electrochemical properties, composite fibers were prepared as electrode substrates using the liquid crystal state of carbon nanotubes (CNT) and MXene (Ti3C2Tx) synergistically. A simple and controllable electrochemical deposition method was applied to deposit polyaniline (PANI) on the fiber surface to prepare composite fiber electrodes. Microscopic morphological characterization and electrochemical performance tests were performed on the fibers to obtain the electrode with the optimal deposition time and assemble the fiber supercapacitor. The result shows that the PANI/Ti3C2Tx/CNT fiber electrode exhibits the highest bulk specific capacitance of 113.92 F/cm3 at a scan rate of 5 mV/s when deposited for 5 min. The specific capacitance of the assembled supercapacitor reached 65.4 F/cm3 at a current density of 0.1 A/cm3. The retention rate of the specific capacitance is 79% after 5 000 cycles at 0.8 A/cm3, indicating good stability.

Key words: fiber electrode, electrochemical deposition, fiber supercapacitor, polyaniline, carbon nanotube, composite fiber

CLC Number: 

  • TM533

Fig.1

SEM images of etched MAX phase and MXene.(a) MAX (Ti3AlC2); (b) MXene (Ti3C2Tx) nanoflake"

Fig.2

High fractional TEM image of MXene fiber"

Fig.3

XRD plots of MAX (Ti3AlC2) and MXene (Ti3C2Tx)"

Fig.4

SEM images of cross-sectional (a) and enlarged cross-section (b) Ti3C2Tx/CNT composite fiber"

Fig.5

SEM images of surface (a) and enlarged surface (b) of Ti3C2Tx/CNT composite"

Fig.6

CV plots of Ti3C2Tx/CNT composite fibers at different scan rates"

Fig.7

SEM images of surface morphology of composite fibers with different deposition times"

Fig.8

Electrochemical properties of fibers at different deposition time. (a) Cyclic voltammetric curves of composite fibers with different deposition time; (b) Specific capacitances of composite fibers under different scan rates; (c) Electrical conductivity of fibers with different deposition times; (d) Nyquist curves of fibers with different deposition time"

Fig.9

Electrochemical properties of composite fiber supercapacitor supercapacitor. (a) Cyclic voltammetric curves at different scan rates; (b) Charge/discharge curves at different current densities; (c) Cyclic charge/discharge graph"

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