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

Zou, Ben-Xue; Gong, Shuping; Wang, Yan; Liu, Xiao Xia

doi:10.1155/2014/813120

Cited by 22 publications

(13 citation statements)

References 34 publications

(52 reference statements)

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“…However, the value of the areal capacitance obtained is a lot of improvement from 4 mF cm −2 obtained by Nwanya et al at a scan rate of 50 mV s −1 (Nwanya et al 2014). It is also comparable to 25 mF cm −2 obtained by Zou et al (Zou et al 2014) for a composite of WO 3 and polyaniline at a scan rate of 5 mV s −1 . The frequency response to the mechanism of the charge storage were further studied using electrochemical impedance spectroscopy (EIS) within the frequency range of 0.01 Hz to100 kHz at a voltage amplitude of 10 mV.…”

Section: Electrochemical Studysupporting

confidence: 81%

Synthesis, characterization and ab initio study of WO3 nanocubes with peculiar electrochemical properties

et al. 2021

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A non-energy intense route was used for the synthesis of highly crystalline WO 3 nanocubes. The morphological studies confirmed the cuboidal shape of the nanocrystals. Raman spectrum result for the synthesized sample revealed that the vibrational modes correspond to those ones assigned to single phase stoichiometric WO 3 . The band gap Eg was derived based on UV-Vis diffuse reflectance result and found to be 2.58 eV, whereas the photoluminescence (PL) result confirmed the blue emission for the synthesized sample. The structural and electronic properties of the orthorhombic WO 3 were studied within the spin-polarized density functional theory (SDFT) using various functionals. Results indicated that the orthorhombic WO 3 is non-magnetic and has a direct band gap in the range of 2.15-3.75 eV which depends on the exchange-correlation functional used in the theory. The electrochemical studies showed that the nanocubes exhibited a peculiar electrochemical behaviour. In fact, the charge transfer resistances relatively enhanced which may results in decreasing the capacitance of the highly crystalline WO 3 nanocubes.

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Section: Electrochemical Studysupporting

confidence: 81%

Synthesis, characterization and ab initio study of WO3 nanocubes with peculiar electrochemical properties

et al. 2021

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“…Electro‐co‐deposition of tungsten oxide (WO 3 ) and PAni with carbon electrode and sodium dodecylbenzene sulfonate (SDBS) surfactant as the template was performed. This nanostructured PAni/WO 3 composite has shown a capacitance of 201 Fg −1 at 1.28 mAcm −2 in large potential window with 78% retention of capacitance . Earlier, Sopčić et al had observed that PAni/RuO 2 composites with binder poly(vinylidene fluoride) (PVdF) display an electrochemical capacitance of 526 Fg −1 .…”

Section: Application Of Polyaniline In the Field Of Supercapacitorsmentioning

confidence: 92%

An overview on the recent developments in polyaniline‐based supercapacitors

Banerjee

Dutta

Kader

et al. 2019

Polymers for Advanced Techs

102

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With the ever-increasing depletion of nonrenewable fossil fuel reserve, greater attention has been directed towards renewable energy storage devices. One of the most important of such devices is the supercapacitor, which exhibits high specific capacitance. Polyaniline (PAni) is a versatile conducting polymer, which has demonstrated excellent electrochemical properties along with good stability and ease of synthesis.Therefore, PAni has been extensively used in the fabrication of supercapacitors. In the last few decades, researchers have studied the effect of morphology, developed during the synthesis of PAni, on its electrochemical properties. It is known that the electrical conductivity and the electrochemical properties of PAni get influenced by the level and type of dopant used, the method of synthesis adopted, and the surface area and porosity possessed. However, it has been realized that supercapacitors based on PAni suffer from short cycle life. This led to development of PAni composites with carbon-based materials and transition metal oxides. In this review, focus has been laid on the achieved performance levels of the recently developed PAni-based supercapacitors. In addition, an attempt has been made to study the fundamental aspects of the conductivity and the electrochemical properties of PAni and their effect on the supercapacitor performance. Moreover, several new interesting applications of PAni-based supercapacitors have also been included in this review.1 | INTRODUCTION Supercapacitors, for the last few decades, have accrued immense attention from the scientific society for their unique properties like long cycle life, wide operating temperature window, high power density, and fast charge-discharge cycle. 1,2 It can store charge in two different ways-either by electrostatic way (electrical double layer capacitors, EDLCs) or by thorough fast and reversible Faradaic reaction (pseudocapacitors). In case of EDLCs, the opposite charges are stored on the surface of the two parallel conductive plates with electrolytes between them that help in shuttling of ions between the two.EDLCs type of supercapacitors have shown higher power densities and hence higher rate capabilities. It has been studied that carbon-based materials have shown EDLC-type behavior with high power density, low cost, and tunable porosity but lacks in energy density. [3][4][5] Pseudocapacitors store charges through fast and reversible reaction, which can store charges near the surface of the electrode, and thus possess high capacitance but low power density. Transition metal oxides (TMOs), mixed TMOs, 6 and conducting polymers (CPs) exhibit pseudocapacitance. TMOs exhibit multiple oxidation states with low activation energy but lack high capacitance and flexibility and suffer from instability. In recent years, extensive studies have been done on TMOs and carbon-based materials. Another group of fascinating materials is CPs, which show high specific capacitance, flexibility, and ease of fabrication. The performance of the supercapacitor is...

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“…The interest in utilizing transition metal oxide films is due to its pseudocapacitive character related to chemisorption processes and redox reactions that take place at the surface [80]. Since nanostructured WO 3 has already proved to enhance capacitive performances due to its large surface area and low charge transport resistance [52], it was used for neural recordings applications [69]. The optimization of the electrodeposition parameters led to a slight increase on the charge storage capacity (∼10%) and a decrease of the impedance values, of approximately 40% ( Fig.…”

Section: Neural Electrodesmentioning

confidence: 99%

Electrodeposition of WO3 Nanoparticles for Sensing Applications

Santos¹,

Neto²,

Crespo³

et al. 2015

Electroplating of Nanostructures

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The motivation of using metal oxides is mainly due to its charge storage capabilities, and electrocatalytic, electrochromic and photoelectrochemical properties. But comparing with bulk, nanostructured materials present several advantages related with the spatial confinement, large fraction of surface atoms, high surface energy, strong surface adsorption and increased surface to volume ratio, which greatly improves the performances of these materials. The deposition of this materials can be accomplished by a variety of physical and chemical techniques but nowadays, electrodeposited metal oxides are generally used in both laboratories and industries due to the flexibility to control structure and morphology of the oxide electrodes combined with a reduced cost. Tungsten oxide (WO 3 ) is a well-studied semiconductor and is used for several applications as chromogenic material, sensor and catalyst. The major important features is its low cost and availability, improved stability, easy morphologic and structural control of the nanostructures, reversible change of conductivity, high sensitivity, selectivity and biocompatibility. For the electrodeposition of WO 3 , more than one method can be adopted: electrodeposition from a precursor solution, anodic oxidation, and electrodeposition of already produced nanoparticles; however, in this case the mechanism of the electrodeposition is not fully understood. In this chapter, a review of the latest published work of electrodeposited nanostructured metal oxides is provided to the reader, with a more detailed explanation of WO 3 material applied in sensing devices.

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

Cited by 22 publications

References 34 publications

Synthesis, characterization and ab initio study of WO3 nanocubes with peculiar electrochemical properties

Synthesis, characterization and ab initio study of WO3 nanocubes with peculiar electrochemical properties

An overview on the recent developments in polyaniline‐based supercapacitors

Electrodeposition of WO3 Nanoparticles for Sensing Applications

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