One-dimensional growth and electrochemical properties of polyaniline deposited by a pulse potentiostatic method

2018

Polymer International

Polyaniline (PANI) nanofibers have enhanced water processibility and improved sensitivity and response time when exposed to chemical vapors, and unique advantages in other fields including electric devices and corrosion inhibition. Therefore, PANI nanofibers have attracted great interest and have potential for many commercial applications. In this paper, the advantages, formation mechanism, characteristics and factors influencing various methods for preparing PANI nanofibers are described in detail. Their conductive properties and mechanism are briefly introduced. Finally, the potential applications of PANI nanofibers are elaborated in many fields such as gas sensors, capacitors, electrode materials for cells, removal of contaminants from water, corrosion inhibition, enzyme immobilization, Schottky diodes, and so on. © 2018 Society of Chemical Industry

Section: Preparation Of Pani Nanofibersmentioning

confidence: 99%

Preparation and application of polyaniline nanofibers: an overview

2018

Polymer International

“…[32] [31] Graphene/PANI [31] Fe 2 O 3 /graphene [32] (b) at around 800 nm with a long tail, which correspond to the polaron bands related transitions, implying the emeraldine salt form of PANI in WP S2.6 [5,28]. Figure 7(a) presents the cyclic voltammograms of the WP S2.6 composite film at scan rates of 10∼150 mV/s with potential range from -0.5 V to 0.65 V. The mirror-like images of CV curves reveal the typical pseudocapacitive behavior with rapid current response on voltage reversal.…”

Section: Characterization Of the Wp Nanocomposite Edx Andmentioning

confidence: 99%

Tungsten Oxide and Polyaniline Composite Fabricated by Surfactant‐Templated Electrodeposition and Its Use in Supercapacitors

Zou

Gong

Journal of Nanomaterials

et al. 2014

Composite nanostructures of tungsten oxide and polyaniline (PANI) were fabricated on carbon electrode by electrocodeposition using sodium dodecylbenzene sulfonate (SDBS) as the template. The morphology of the composite can be controlled by changing SDBS surfactant and aniline monomer concentrations in solution. With increasing concentration of aniline in surfactant solution, the morphological change from nanoparticles to nanofibers was observed. The nanostructured WO3/PANI composite exhibited enhanced capacitive charge storage with the specific capacitance of 201 F g−1at 1.28 mA cm−2in large potential window of-0.5~ 0.65 V versus SCE compared to the bulk composite film. The capacitance retained about 78% when the sweeping potential rate increased from 10 to 150 mV/s.

“…Polyaniline (PANI) is a popular candidate for practical applications in supercapacitors due to its good processability, environmental stability, low cost, and reversible control of electrical properties by both charge-transfer doping and protonation [13,14]. Carbon nanotubes (CNTs) have been regarded as excellent filler for polymer in improving the electric conductivity as well as the mechanical properties for application in supercapacitors [15,16].…”

Section: Introductionmentioning

confidence: 99%

One-step electrodeposition of polyaniline/nickel hexacyanoferrate/sulfonated carbon nanotubes interconnected composite films for supercapacitor

J Solid State Electrochem

Yang

Zhang

et al. 2015

Sulfonated carbon nanotubes (sCNTs) were prepared by reacting concentrated sulfuric acid with carbon nanotubes (CNTs) on the defect sites. Fourier transform infrared (FTIR) spectroscopy and transmission electron microscopy (TEM) were used to characterize the morphology and structure of sCNTs, respectively. Subsequently, polyaniline (PANI)/nickel hexacyanoferrate (NiHCF)/sCNT interconnected composite films were electrodeposited on the platinum electrode by the one-step co-polymerization using cyclic voltammetry in an aqueous dispersion containing sCNTs. The effect of concentration of NiSO 4 and K 3 Fe(CN) 6 in the prepared solution on the morphology and structure of PANI/NiHCF/sCNTs composite films was studied by scanning electron microscopy (SEM), FTIR spectroscopy, and X-ray diffraction (XRD), respectively. The effect of concentration of NiSO 4 and K 3 Fe(CN) 6 in the prepared solution on polymerization and electrochemical performance was investigated by cyclic voltammetry (CV), galvanostatic charge/ discharge tests, and electrochemical impedance spectroscopy (EIS). One-step electrodeposition mechanism was discussed deeply. It was found that sulfonic acid groups had been attached to surface of CNTs, and sCNTs had higher dispersibility than CNTs in an aqueous dispersion. The morphology of PANI/NiHCF/sCNTs interconnected composite films was remarkably influenced by the concentration of NiSO 4 and K 3 Fe(CN) 6 . The tubular packing structure appeared with the low concentration of NiSO 4 and K 3 Fe(CN) 6 in prepared solution, while the beautiful coral-like interconnected structure exhibited with 0.04 mol L −1 NiSO 4 and 0.04 mol L −1 K 3 Fe(CN) 6 , which was mainly attributed to the π-π* electron stacking effect among sCNTs, NiHCF, and PANI. The specific capacitance and electroactivity of PANI/NiHCF/sCNTs composite films increased markedly with the increase of concentration of NiSO 4 and K 3 Fe(CN) 6 in prepared solution. The specific capacitance of PANI/NiHCF/sCNTs composite film was 430.77 F g −1 with 0.04 mol L −1 NiSO 4 and 0.04 mol L −1 K 3 Fe(CN) 6 due to selfdoping effect of sCNT in composite films. The cycle stability of PANI/NiHCF/sCNTs composite films was enhanced with the increase of NiSO 4 and K 3 Fe(CN) 6 in prepared solution.