TiO2-nanoflowers as flexible electrode for high performance supercapacitor

Ahirrao, Dinesh J.; Wilson, Higgins M.; Jha, Neetu

doi:10.1016/j.apsusc.2019.05.076

Cited by 62 publications

(26 citation statements)

References 47 publications

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“…The discharge curve indicated the SC values of 264.3, 223.8, 181.8, and 155.5 F/g at 0.25, 1, 2, and 5 A/g, respectively. The steady decrease of SC could be attributed to the diffusion limitations and the decrease of pseudocapacitance with increasing current density . However, all the GCD curves exhibited a nearly symmetrical triangular shape and straight discharge slopes, suggesting good electrochemical capacitive behavior with a small IR drop and excellent reversibility of the charge/discharge process. , …”

Section: Resultsmentioning

confidence: 92%

“…However, it can be found from the results that the overall composite material is lower than the high-performance and breathable PPy-coated air-laid paper (3100 mF•cm −2 at 1 mA•cm The steady decrease of SC could be attributed to the diffusion limitations and the decrease of pseudocapacitance with increasing current density. 44 However, all the GCD curves exhibited a nearly symmetrical triangular shape and straight discharge slopes, suggesting good electrochemical capacitive behavior with a small IR drop and excellent reversibility of the charge/ discharge process. 45,46 The EIS technique was employed to explore the ionic/ electronic transport pathways in GR/PPy/CNF.…”

Section: ■ Results and Discussionmentioning

confidence: 93%

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Preparation of Foam-like Network Structure of Polypyrrole/Graphene Composite Particles Based on Cellulose Nanofibrils as Electrode Material

et al. 2020

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Unusual polypyrrole/graphene/cellulose nanofibril (PPy/GR/CNF) composite particles were fabricated by introducing an in situ oxidative polymerization approach. Structural characterization of the composite particles showed foam-like network morphology with a large surface area of 621 m 2 /g. The PPy/GR/CNF sample exhibited remarkable capacitance behavior in 1 M Na 2 SO 4 . It showed a high specific capacitance of 264.3 F/g at 0.25 A/g, which represents a 51.7% increase compared to that of PPy/GR and a high capacitance of 155.5 F/g even at a high current density of 5 A/g. Meanwhile, it possessed high rate capability and good cycling performance (85.7% capacitance retention even after 1000 cycles). These excellent electrochemical performances were attributed to the structure of PPy/GR/CNF that can provide large surface areas and shorten electron diffusion pathways. More importantly, the CNF stabilized the structure of PPy and prevented chain breakdown during the charge/discharge process, which improved the cycling performance. Hence, this PPy/GR/ CNF composite shows great potential for the fabrication of high-capacitance and low-cost supercapacitor electrode materials with good cycling performance.

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Section: Resultsmentioning

confidence: 92%

Section: ■ Results and Discussionmentioning

confidence: 93%

Preparation of Foam-like Network Structure of Polypyrrole/Graphene Composite Particles Based on Cellulose Nanofibrils as Electrode Material

et al. 2020

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“…TiO 2 nanoparticles can be synthesized by hydrothermal processes as a result of the peptized precipitation of titanium pre-initiator and water [23] or by hydrothermal reaction of titanium alkoxide stabilized in acidic ethanol/water solution [16,24,25]. By changing the pH of the aqueous medium, TiO 2 nanoparticles can be synthesized in different polymorphs [21].…”

Section: Synthesismentioning

confidence: 99%

Titanium Dioxide Nanoparticles

Sungur¹

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Nanomaterials are materials engineered with extremely small particle size having at least one dimension in the range of 1-100 nm. When materials are produced in nanoscale, they demonstrate unique electronic, magnetic, catalytic, and optical properties for a wide range of applications in a variety of fields such as engineering, medicine, and the environment. Nanomaterials with attractive chemical and physical properties are being explored for potential uses in energy and environmental applications. Due to the ability to enhance efficiency through control of bandgap, chemical composition, structural scheme, light propagation, charge collection/transport, etc., nanomaterials have attracted immense attention. Titanium dioxide (TiO 2) nanoparticles are manufactured worldwide in large quantities for use in a wide range of applications. Nanostructured TiO 2 has gained considerable attention in the energy and environment sectors due to their brilliant prospects in photocatalysis, solar cells, and environmental pollution treatment.

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“…[1][2][3][4][5][6] Therefore, many efforts have been devoted to designing supercapacitors with novel materials combining the advantages of large surface area and high conductivity. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Recently, a series of transition metal oxides such as MnO 2 , [22][23][24] Co 3 O 4 , [25][26][27] V 2 O 5 , 28 NiO, 29 Fe 2 O 3 , 30 ZnO, 31 MgO, 32 and TiO 2 33 have been extensively investigated as pseudocapacitive supercapacitor electrode materials for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Electrophoretic co‐deposition of Bi₂O₃–multiwalled carbon nanotubes coating as supercapacitor electrode

Zhang

Xiang

2022

J Am Ceram Soc.

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Nafion is suggested as an efficient assistant in preparing supercapacitor by employing nanoparticles. In this work, using a bi‐additive of 0.10‐mM NaOH + 0.10 g L−1 Nafion, Nafion‐assisted electrophoretic co‐deposition of Bi2O3–multiwalled carbon nanotubes (MWCNTs) coating is successfully realized in ethanol solvent. The capacitance performances of the electrophoretic coatings in 6.0‐M KOH electrolyte are investigated by cyclic voltammetry and galvanostatic charge–discharge techniques. Comparing with Bi2O3 coating prepared with electrophoretic deposition (EPD) by employing other additive (such as polyethyleneimine), the Bi2O3 coating prepared by Nafion‐assisted EPD shows a better capacitance performance. Benefiting from the improvement in coating conductivity caused by MWCNTs, with a small additional amount of 4.0 wt.%, the Bi2O3–MWCNTs coating exhibits an amazing 164% increase of mass‐specific capacitance (473 F g−1 at the current density of 1.0 A g−1) in comparison with pure Bi2O3 coating (179 F g−1 at the current density of 1.0 A g−1). The cyclic stability test exhibits excellent capacitance retention of 88.7% over 3000 cycles at a constant current density of 10.0 A g−1. This work combines the advantages of MWCNTs, Nafion, and EPD to provide a facile route for preparing Bi2O3‐based coating as a high‐performance supercapacitor electrode.

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TiO2-nanoflowers as flexible electrode for high performance supercapacitor

Cited by 62 publications

References 47 publications

Preparation of Foam-like Network Structure of Polypyrrole/Graphene Composite Particles Based on Cellulose Nanofibrils as Electrode Material

Preparation of Foam-like Network Structure of Polypyrrole/Graphene Composite Particles Based on Cellulose Nanofibrils as Electrode Material

Titanium Dioxide Nanoparticles

Electrophoretic co‐deposition of Bi₂O₃–multiwalled carbon nanotubes coating as supercapacitor electrode

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TiO2-nanoflowers as flexible electrode for high performance supercapacitor

Cited by 62 publications

References 47 publications

Preparation of Foam-like Network Structure of Polypyrrole/Graphene Composite Particles Based on Cellulose Nanofibrils as Electrode Material

Preparation of Foam-like Network Structure of Polypyrrole/Graphene Composite Particles Based on Cellulose Nanofibrils as Electrode Material

Titanium Dioxide Nanoparticles

Electrophoretic co‐deposition of Bi2O3–multiwalled carbon nanotubes coating as supercapacitor electrode

Contact Info

Product

Resources

About

Electrophoretic co‐deposition of Bi₂O₃–multiwalled carbon nanotubes coating as supercapacitor electrode