Double layer capacitor based on active carbon and its improved capacitive properties using redox additive electrolyte of anthraquinonedisulphonate

Tian, Ying; Xue, Rong; Zhou, Xiaohui; Liu, Zongyu; Huang, Liping

doi:10.1016/j.electacta.2014.11.120

Cited by 54 publications

(26 citation statements)

References 41 publications

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“…Enhanced energy and power densities can be achieved due to the introduction of AQ as a redox modifier for the negative carbon electrode of a carbon supercapacitor [23]. The Faradaic redox reactions of quinone/hydroquinone were diffusion controlled and the working potential window could be extended [24,25]. It has been reported that AQ can be covalently grafted onto graphene by reduction of its diazonium salts and exhibited excellent electrocatalytic performance [26].…”

Section: Introductionmentioning

confidence: 98%

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Han

Wang

et al. 2017

Carbon

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Section: Introductionmentioning

confidence: 98%

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Han

Wang

et al. 2017

Carbon

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“…An intercept at high frequency region with real axis of Z 0 is inner resistance (R s ) and distorted semicircle is charge-transfer resistance (R ct ) across the electrode-electrolyte interface. 24,25 From the tting equivalent circuit (inset of Fig. 5), it can be concluded that the R s of NiO thin lm electrode is about 0.89 U, while the R s of r-NiO is about 0.85 U.…”

Section: Electrochemical Performance Of Nio and R-nio Electrodesmentioning

confidence: 99%

Comparison of two different nickel oxide films for electrochemical reduction of imidacloprid

et al. 2020

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A nickel oxide (NiO) thin film was successfully prepared on Ni foil via a sol-gel method and a reduced state nickel oxide (r-NiO) thin film was obtained by etching NiO with hydrazine hydrate solution. Structure characterization through X-ray diffraction and scanning electron microscopy revealed the growth of nanostructure films on the surface of nickel foil. Cyclic voltammetry, linear sweep voltammetry and electrochemical impedance spectroscopy were used to assess the performance of the two films.Electroreduction of alkaline imidacloprid solution under potentiostatic conditions was carried out in a three-electrode system. The removal efficiencies of 80.2% (r-NiO) and 66.3% (NiO), and the current efficiencies of 67.3% (r-NiO) and 58.9% (NiO) were much higher than 41.7% (removal efficiency) and 0.003% (current efficiency) on the bare Ni electrode. This study prepared two novel thin films with composites of NiO or r-NiO, and thus provided feasible and efficient electrochemical degradation of imidacloprid. The degradation products were characterized and the possible degradation pathways were proposed.

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“…A possible explanation for the 'dumbbell-like' shape, exhibited by HNO 3 treatment at 10 and 25 mV s À1 as well as at 25 and 50 mV s À1 for HCl/HNO 3 , is the contribution from either ion adsorption inside tubes or pseudo redox reactions from oxygen functionalities [16]. The observed steeper slope of the CV curves at switching potentials is attributed to either small ion diffusion resistance or kinetically faster redox reactions [11,47,48] introduced by the oxygen-containing groups on the surface of MWCNTs. The appearance of an oval-shaped CV curve with an increase in scan rate is normally an indication of an increase in mass transfer resistance [11].…”

Section: Lithium Sulfate Electrolytementioning

confidence: 99%

Oxygen-modified multiwalled carbon nanotubes: physicochemical properties and capacitor functionality

Mombeshora

Ndungu

Jarvis

et al. 2017

Int. J. Energy Res.

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Summary Multiwalled carbon nanotubes (MWCNTs) have found numerous applications in energy conversion systems. The current work focused on the introduction of oxygen moieties onto the walls of MWCNTs by five different reagents and investigating the associated physicochemical properties. Oxygen‐containing groups were introduced onto MWCNTs using an ultrasound water‐bath treatment with HNO3, HCl, H2O2 or HCl/HNO3 solution. Physicochemical properties were characterised by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, Raman, thermal gravimetric analysis, textural characteristics, cyclic voltammetry and electrochemical impedance spectroscopy. The study focus was mainly on linking the physicochemical properties of oxygen‐functionalised MWCNTs and suitability in electrochemical capacitors using group one sulfates. From the Fourier transform infrared spectroscopy KBr pellet protocol, peaks at 3400, 2370 and 1170 cm−1 suggest oxygen‐containing functionalities on MWCNTs. HNO3 treatment introduced highest oxygen‐containing moieties and achieved highest specific capacitance in Li2SO4 and Na2SO4 electrolytes of 36.200 F g−1 (77 times better than pristine) and 45.100 F g−1 (2.5 times enhancement), respectively. For K2SO4, it was 33.600 F g−1 (4.9 times better) with HNO3/HCl‐treated samples. Oxygen‐functionalised MWCNTs displayed both pseudo and electrochemical double‐layer mechanism of enhanced charge storage and cycle stability in group one sulfates electrolytes. The dominating charge storage mechanism was pseudo, and Na2SO4 was the best electrolyte amongst the three group one sulfates investigated. Copyright © 2017 John Wiley & Sons, Ltd.

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Double layer capacitor based on active carbon and its improved capacitive properties using redox additive electrolyte of anthraquinonedisulphonate

Cited by 54 publications

References 41 publications

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Comparison of two different nickel oxide films for electrochemical reduction of imidacloprid

Oxygen-modified multiwalled carbon nanotubes: physicochemical properties and capacitor functionality

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