Fabrication of polyaniline/copper sulfide/poly(ethylene terephthalate) thread electrode for flexible fiber‐shaped supercapacitors

Abstract

Fiber-shaped supercapacitors have drawn much attention for their great potential application in future portable and wearable electronics because of their outstanding flexibility, tiny volume, and good deformability. In this work, commercial poly(ethylene terephthalate) (PET) thread was successfully converted into an electrically conductive and electrochemically active thread by introducing copper sulfide (CuS) and polyaniline (PANI) via simple chemical bath deposition and electrochemical deposition. The obtained PANI/CuS/PET electrode combined all the advantages of PET, CuS, and PANI, showing an excellent physical and electrochemical performance. The fiber-shaped supercapacitor exhibits a high specific capacitance of 29 mF cm −2 (116 mF cm −2 for a single electrode) and good cycling stability with 93.1% retention after 1000 cycles. With the simple preparation method and low-cost raw materials, this strategy provides a reference for the fabrication of portable/wearable energy storage devices.

An Amazingly Simple, Fast and Green Synthesis Route to Polyaniline Nanofibers for Efficient Energy Storage

“…This is proven by plotting the square root of the scan rage against the peak currents of the anodic and cathodic process of the redox transition ( Figure 5 b). The linear relationship implies that the redox reaction is diffusion controlled within the range of 20–300 mVs −1 , suggesting the good rate capability of the electrode [ 57 ].…”

All‐gel‐state supercapacitors of polypyrrole reinforced with graphene nanoplatelets

“…[1][2][3][4][5] The general strategy to achieve structures having satisfactory both mechanical and electrochemical properties combines the elastic matrix (such as carbon clothes, elastoplastic films, cotton, cellulosic, and silk fibers) with fillers (carbon derivatives, conducting polymers, and metal oxide nanoparticles). 3,[6][7][8] However, the combination of different materials for use as flexible substrates (such as carbon paper 9 and cotton-based fibers 7,[10][11][12] ) introduces drawbacks under severe mechanical deformations, such as delamination and fast degradation. The development of all-gel-state supercapacitors is a possibility to avoid these processes because of the minimal interface between distinct materials applied in the assembly of devices.…”

Fiber‐Shaped Electronic Devices

“…utilized commercial polyethylene terephthalate (PET) thread as template to coat CuS followed by PANI via chemical bath deposition and electrodeposition. [ 178 ] The cost‐effectiveness, chemical inertness, high mechanical strength, and abundance of PET has caught the attention of research groups working in the field of FSCs. [ 179 ] The fabricated PANI/CuS/PET electrodes twisted together to form a symmetric TFSC and this device delivered a high specific capacitance of 29 mF cm −2 and 93.1% capacitance retention after 1000 cycles in PVA–H 3 PO 4 electrolyte.…”

“…[ 179 ] The fabricated PANI/CuS/PET electrodes twisted together to form a symmetric TFSC and this device delivered a high specific capacitance of 29 mF cm −2 and 93.1% capacitance retention after 1000 cycles in PVA–H 3 PO 4 electrolyte. [ 178 ] The high electrical conductivity of PANI is favorable in aiding high specific capacitance to the electrode. In another attempt, a core–sheath porous structure that consisted of 1D PANI nanorods, which relieved the volume expansion during the charge–discharge process offered good stability to the electrode [ 180 ] ( Figure 19 ).…”