A high-performance supercapacitor based on a polythiophene/multiwalled carbon nanotube composite by electropolymerization in an ionic liquid microemulsion

Abstract

Polythiophene (PTh) was electrochemically polymerized onto the multiwalled carbon nanotube (MWCNT) modified carbon paper by a galvanostatic method in an oil-in-ionic liquid microemulsion (O/IL). The asprepared PTh/MWCNT composite had an interlaced framework morphology, in which the MWCNTs were uniformly coated by PTh with a thickness of 2-3 nm. The capacitive performance of the asprepared PTh/MWCNT composite was tested in 1 mol L À1 Na 2 SO 4 solution. The results showed that the composite film had a favorable capacitance with a high electron transfer rate and low resistance. The highest specific capacitance could be achieved as high as 216 F g À1 with the charge loading of 300 mC at a current density of 1 A g À1 . The PTh/MWCNT composite had a good cycle stability with a low fading rate of specific capacitance after 500 cycles. The results demonstrated the feasibility of the as-prepared PTh/MWCNT composite to be used as an electrode material for supercapacitors.

Constructing a “Pizza‐Like” MoS2/Polypyrrole/Polyaniline Ternary Architecture with High Energy Density and Superior Cycling Stability for Supercapacitors

“…[6][7][8] Among various electrode materials, conducting polymers such as polypyrrole (PPy) and polyaniline (PANI), [9][10][11] are receiving specifi c attentions due to their intrinsic characteristics including low cost, easy preparation, remarkable storage capacity, good conductivity, and broad voltage window. [6][7][8] Among various electrode materials, conducting polymers such as polypyrrole (PPy) and polyaniline (PANI), [9][10][11] are receiving specifi c attentions due to their intrinsic characteristics including low cost, easy preparation, remarkable storage capacity, good conductivity, and broad voltage window.…”

Tailoring environment friendly carbon nanostructures by surfactant mediated interfacial engineering

“…CNT/polyaniline coaxial nanocables were prepared by a reverse microemulsion [25]. Recently, an ionic liquid was incorporated into a microemulsion system to prepare electrochemically polymerized polythiophene/multiwalled carbon nanotube (MWCNTs) [26]. The composite had an interlaced framework morphology and a highest specific capacitance of 216 F/g, which was useful for supercapacitor even after 500 cycles.…”

“…In these studies, amphiphilic surfactants have been used as both dispersion promoter for CNTs and structure directing agent for polymer layers. First, conducting polymer layers are lucrative as media to improve the electrical properties of resulting materials [24][25][26][27][28].…”

Polythiophene Grafted onto Single‐Wall Carbon Nanotubes through Oligo(ethylene oxide) Linkages for Supercapacitor Devices with Enhanced Electrochemical Performance

“…Among the mentioned carbon‐based materials, those consisting of SWCNTs have attracted great interest because of high specific surface area, which can expose entirely either basal graphite planes or edge planes to the electrolyte. Therefore, interest in the development of electrodes, based on composites of PTh and SWCNTs as supercapacitors, has been growing recently . In the previous reports, most of PTh‐SWCNTs composites were prepared by the direct blending, in‐situ chemical oxidative polymerization, and electrochemically synthesis.…”