Influence of chemical structure of dyes on capacitive dye removal from solutions

Shi, Kai; Zhitomirsky, Igor

doi:10.1016/j.electacta.2015.06.029

Cited by 37 publications

(7 citation statements)

References 65 publications

(67 reference statements)

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“…Electrochemical supercapacitors (ES) are currently under development for energy storage in electronic devices, hybrid and electric vehicles, capacitive deionization of water, and capacitive dye removal from aqueous solutions . Fundamental investigations have been focused on the development of advanced electrode materials, electrolytes, device design, and modeling .…”

Section: Introductionmentioning

confidence: 99%

Efficient Lightweight Supercapacitor with Compression Stability

Shi

Yang

Cranston

et al. 2016

Adv Funct Materials

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129

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This article reports the fabrication of an electrochemical supercapacitor (ES) with high gravimetric and areal capacitance, achieved at a high mass ratio of active material to current collector. The active material, polypyrrole, was in situ polymerized in an aerogel-based current collector composed of crosslinked cellulose nanocrystals (CNC) and multiwalled carbon nanotubes (MWCNT). Mechanical robustness, flexibility and low impedance of the current collectors were achieved by the chemical crosslinking of CNC aerogels and efficient dispersion of MWCNT through the use of bile acid as a dispersant. Furthermore, the advanced electrode design resulted in low contact resistance. A single electrode areal capacitance of 2.1 F cm -2 was obtained at an active mass loading of 17.8 mg cm -2 and an active material to current collector mass ratio of 0.57. Large area ES electrodes and devices showed flexibility, excellent compression stability at 80% compression, and electrochemical cyclic stability over 5000 cycles. Moreover, good retention of capacitive properties was achieved at high charge-discharge rates and during compression cycling. The results of this investigation pave the way for the fabrication of advanced lightweight ES, which can be used for energy storage in wearable electronic devices and other applications.3

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Section: Introductionmentioning

confidence: 99%

Efficient Lightweight Supercapacitor with Compression Stability

Shi

Yang

Cranston

et al. 2016

Adv Funct Materials

Self Cite

129

View full text Add to dashboard Cite

show abstract

“…They can manage a much higher power rates than chemical batteries and therefore, while they may have a limited storage capacity, are ideal for applications in which a sudden power surge is needed [1, 2]. Capacitive DeIonization (CDI) system, also has received a great deal of attention in recent years mostly for its application in desalination of brackish and saline water and also some water purifications like dye removals [3]. The CDI has an adsorption mechanism similar to Electric Double Layer Capacitors (EDLCs) [4].…”

Section: Introductionmentioning

confidence: 99%

Multi-parameter optimization of the capacitance of Carbon Xerogel catalyzed by NaOH for application in supercapacitors and capacitive deionization systems

Alam

Mirbagheri

Ghaani

2019

Heliyon

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Carbon Xerogel is an economic choice of material for electrodes with applications in Electric Double Layer Capacitors (EDLCs) and Capacitive DeIonization systems (CDI, particularly for desalination). The objective here is to optimize Carbon Xerogel's performance, specifically its capacitance, through multi-parameter optimization using Response Surface Methodology (RSM). We choose NaOH as the catalyst and select as the optimization parameters (i) the pH of the initial Resorcinol-Formaldehyde-Catalyst (RFC) solution, (ii) Reactants to Liquid mass ratio (R/L) of the RFC solution, and (iii) the Pyrolysis Temperature (PT). For a selected range of these three parameters, we obtain an optimum capacitance of Carbon Xerogel equal to 37.6 F/g with optimized parameters PT = 800, R/L = 30% and pH = 5.7. Through comparing Carbon Xerogel samples synthesized with Na 2 CO 3 versus NaOH as the catalyst, we show that the capacitance not only depends on the pH of the initial RFC solution, but also is a strong function of the catalyst material.

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“…They can readily donate or accept a delocalized electron with charge compensation caused by counter-ion adsorption on the surface of PHCs [13,14,15]. In addition, their high specific surface areas and high electrical conductivities enable significantly fast and stable charge delivery [16,17,18,19]. A more interesting aspect of the C-AEMs is the surface-driven faradic behaviors in the cathodic voltage region of >2 V [20,21,22,23,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

Intensification of Pseudocapacitance by Nanopore Engineering on Waste-Bamboo-Derived Carbon as a Positive Electrode for Lithium-Ion Batteries

et al. 2019

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Nanoporous carbon, including redox-active functional groups, can be a promising active electrode material (AEM) as a positive electrode for lithium-ion batteries owing to its high electrochemical performance originating from the host-free surface-driven charge storage process. This study examined the effects of the nanopore size on the pseudocapacitance of the nanoporous carbon materials using nanopore-engineered carbon-based AEMs (NE-C-AEMs). The pseudocapacitance of NE-C-AEMs was intensified, when the pore diameter was ≥2 nm in a voltage range of 1.0~4.8 V vs Li+/Li under the conventional carbonate-based electrolyte system, showing a high specific capacity of ~485 mA·h·g−1. In addition, the NE-C-AEMs exhibited high rate capabilities at current ranges from 0.2 to 4.0 A·g−1 as well as stable cycling behavior for more than 300 cycles. The high electrochemical performance of NE-C-AEMs was demonstrated by full-cell tests with a graphite nanosheet anode, where a high specific energy and power of ~345 Wh·kg−1 and ~6100 W·Kg−1, respectively, were achieved.

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Influence of chemical structure of dyes on capacitive dye removal from solutions

Cited by 37 publications

References 65 publications

Efficient Lightweight Supercapacitor with Compression Stability

Efficient Lightweight Supercapacitor with Compression Stability

Multi-parameter optimization of the capacitance of Carbon Xerogel catalyzed by NaOH for application in supercapacitors and capacitive deionization systems

Intensification of Pseudocapacitance by Nanopore Engineering on Waste-Bamboo-Derived Carbon as a Positive Electrode for Lithium-Ion Batteries

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