Differentiate the pseudocapacitance and double-layer capacitance contributions for nitrogen-doped reduced graphene oxide in acidic and alkaline electrolytes

Lee, Ying-Hui; Chang, Kuo‐Hsin; Hu, Chi‐Chang

doi:10.1016/j.jpowsour.2012.11.026

Cited by 441 publications

(246 citation statements)

References 44 publications

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“…According to previous studies, the presence of nitrogen moieties increases the electronic charge density on the surface of the ACs, which favors the adsorption of protons from the acidic electrolyte [16,36]. Therefore, the presence of nitrogen functionalities in the chitosan-based ACs may have enhanced their pseudocapacitive behavior, as well as their double-layer capacitance.…”

Section: Electrochemical Performancementioning

confidence: 90%

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

et al. 2016

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Nitrogen-containing activated carbons were prepared from chitosan, a widely available and inexpensive biopolysaccharide, by a simple procedure and tested as electrode material in supercapacitors. The physical activation of chitosan chars with CO 2 led to carbons with a very high nitrogen content (up to 5.4 wt%) and moderate surface areas (1000-1100 m 2 g -1 ). Only chitosan-based activated carbons with a similar microporous structure were considered in this study to evaluate the effect of the nitrogen content and distribution on their electrochemical performance. The N-containing activated carbons were tested in two-and three-electrode supercapacitors using an aqueous electrolyte (1 M H 2 SO 4 ), and they exhibited superior surface capacitance (19.5 lF cm -2 ) and pseudocapacitance compared to a commercial activated carbon with a negligible nitrogen content and similar microporosity. The low oxygen content and the presence of stable quaternary nitrogen improved the charge propagation on the chitosan-based carbons, which was confirmed by the high capacity retention of 83 %. The chitosan-based carbons exhibited excellent cyclic stability and maintained 100 % of their capacitance after 5000 charge/discharge cycles at a current density of 1 A g -1 . These results demonstrate the suitability of chitosan-based carbons for application in energy storage systems.Electronic supplementary material The online version of this article

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Section: Electrochemical Performancementioning

confidence: 90%

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

et al. 2016

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“…Lower synthesis temperatures mainly lead to pyridinic and pyrrolic nitrogen which can be protonated and deprotonated increasing the capacitance. [61][62][63][64] Contrarily, quaternary nitrogen, representing the most temperature-stable site, should have a minor influence on the pseudocapacitance but enhances the electron transport through the carbon material supporting improved capacitance retention at faster charge/discharge rates. 62,64 Indeed, XPS measurements reveal a very high relative amount of pyridinic (42%) and pyrrolic (38%) N-sites for Ade-Mg-10-800 whereas at synthesis temperature higher than 900 1C graphitic N is the dominant species ( Fig.…”

Section: Supercapacitor Performance Of the Tubular Porous Ndcsmentioning

confidence: 99%

Ionothermal template transformations for preparation of tubular porous nitrogen doped carbons

et al. 2017

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“…However, nitrogen-doped carbon nanotubes exhibit higher capacitance values, probably due to the presence of surface functional groups, which may be a source of pseudocapacitance. [11][12][13][14] Another reason of higher current density observed on the CV curve of (p)N-CNTs may be the more homogenous electrode layer compared to the pristine CNTs, which tends to agglomerate.…”

Section: Characterization Of Pristine and Nitrogen-doped Carbon Nanotmentioning

confidence: 99%

High-performance method of carbon nanotubes modification by microwave plasma for thin composite films preparation

et al. 2017

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In this work we present a simple and efficient method of nitrogen plasma modification of carbon nanotubes (CNTs). The process allows for treatment of the nanotubes in the form of powder with quite a high yield (65 mg of CNTs per hour). The modified carbon nanotubes contain approx. 3.8% nitrogen, mostly in the pyridinic form. Plasma treated CNTs exhibit better dispersibility in water and higher electric capacitance than pristine CNTs. Modified CNTs are a proper component of novel nanocomposites based on the conducting polymer poly(3,4-ethyleneidoxythiophene). Electrodeposited thin layers of the nanocomposite exhibit improved electrochemical properties (higher capacitance, better stability, lower resistance, faster diffusion) compared to the pure polymer layers.

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Differentiate the pseudocapacitance and double-layer capacitance contributions for nitrogen-doped reduced graphene oxide in acidic and alkaline electrolytes

Cited by 441 publications

References 44 publications

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

Ionothermal template transformations for preparation of tubular porous nitrogen doped carbons

High-performance method of carbon nanotubes modification by microwave plasma for thin composite films preparation

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