Capacitance behaviour of the ammoxidised coal

Jurewicz, K.; Babeł, K.; Ziółkowski, Artur; Wachowska, Helena

doi:10.1016/j.jpcs.2003.10.023

Cited by 92 publications

(53 citation statements)

References 7 publications

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“…If the carbon is highly activated to obtain the desired porosity, there is an unavoidable detriment in the nitrogenated functionalities. [25] In contrast, the Y-AN carbon herein reported exhibits both craved properties, because of the benefits of the template procedure. Despite the high stabilization temperature (900°C), the thermal heating carried out in the zeolite/carbon composite seems to prevent the removal of nitrogen while keeping the porous texture.…”

Section: Chemical Features Of the Templated Carbonmentioning

confidence: 87%

“…[24] Even after activation with 50 % burn-off degree of the carbonized polymeric precursor, the BET specific surface area remains much lower than that obtained for the templated carbon. [8,24,25] Adv. Funct …”

Section: Replication Of the Zeolite Frameworkmentioning

confidence: 99%

“…The contribution of nitrogen to pseudofaradaic effects has already been studied in the literature although the mechanism still remains somewhat uncertain. [1,18,19,[23][24][25] To explore the pseudocapacitive contribution in the acidic electrolytic medium, cyclic voltammetry was recorded for Y-AN and AC in a three-electrode cell using a graphite rod as a counter electrode and a Hg/Hg 2 SO 4 reference electrode (Fig. 5).…”

Section: Electrochemical Behaviormentioning

confidence: 99%

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The Large Electrochemical Capacitance of Microporous Doped Carbon Obtained by Using a Zeolite Template

Ania

Khomenko

Raymundo-Piñero

et al. 2007

Adv Funct Materials

497

300

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A novel microporous templated carbon material doped with nitrogen is synthesized by using a two‐step nanocasting process using acrylonitrile (AN) and propylene as precursors, and Na–Y zeolite as a scaffold. Liquid‐phase impregnation and in situ polymerization of the nitrogenated precursor inside the nanochannels of the inorganic scaffold, followed by gas‐phase impregnation with propylene, enables pore‐size control and functionality tuning of the resulting carbon material. The material thereby obtained has a narrow pore‐size distribution (PSD), within the micropore range, and a large amount of heteroatoms (i.e., oxygen and nitrogen). In addition, the carbon material inherits the ordered structure of the inorganic host. Such features simultaneously present in the carbon result in it being ideal for use as an electrode in a supercapacitor. Although presenting a moderately developed specific surface area (SBET = 1680 m2 g–1), the templated carbon material displays a large gravimetric capacitance (340 F g–1) in aqueous media because of the combined electrochemical activity of the heteroatoms and the accessible porosity. This material can operate at 1.2 V in an aqueous medium with good cycleability—‐beyond 10 000 cycles—and is extremely promising for use in the development of high‐energy‐density supercapacitors.

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Section: Chemical Features Of the Templated Carbonmentioning

confidence: 87%

Section: Replication Of the Zeolite Frameworkmentioning

confidence: 99%

Section: Electrochemical Behaviormentioning

confidence: 99%

See 1 more Smart Citation

The Large Electrochemical Capacitance of Microporous Doped Carbon Obtained by Using a Zeolite Template

Ania

Khomenko

Raymundo-Piñero

et al. 2007

Adv Funct Materials

497

300

View full text Add to dashboard Cite

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“…It has been pointed out that the doping of heteroatoms such as nitrogen and oxygen in the carbon framework can also markedly increase the EDLC capacitance. [12][13][14][15][16][17] The presence of heteroatoms was proposed to make the carbon surface more polar and increase the surface affinity to aqueous electrolytes. Furthermore, pseudocapacitance seemed to be generated at such heteroatoms.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mesoporous Carbons with Controllable N-Content and Their Supercapacitor Properties

2008

Bulletin of the Korean Chemical Society

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A synthesis route to ordered mesoporous carbons with controllable nitrogen content has been developed for high-performance EDLC electrodes. Nitrogen-doped ordered mesoporous carbons (denoted as NMC) were prepared by carbonizing a mixture of two different carbon sources within the mesoporous silica designated by KIT-6. Furfuryl alcohol was used as a primary carbon precursor, and melamine as a nitrogen dopant. This synthesis procedure gave cubic Ia3d mesoporous carbons containing nitrogen as much as 13%. The carbon exhibited a narrow pore size distribution centered at 3-4 nm with large pore volume (0.6-1 cm 3 g −1) and high specific BET surface area (700-1000 m 2 g −1). Electrochemical behaviors of the NMC samples with various Ncontents were investigated by a two-electrode measurement system at aqueous solutions. At low current density, the NMC exhibited markedly increasing capacitance due to the increase in the nitrogen content. This result could be attributed to the enhanced surface affinity between carbon electrode and electrolyte ions due to the hydrophilic nitrogen functional groups. At high current density conditions, the NMC samples exhibited decreasing specific capacitance against the increase in the nitrogen content. The loss of the capacitance with the N-content may be explained by high electric resistance which causes a significant IR drop at high current densities. The present results indicate that the optimal nitrogen content is required for achieving high power and high energy density simultaneously.

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“…Nitrogen doping was implemented through the direct embedment of the nitrogen source into the as-prepared electrospinning solution. Nevertheless, the fabrication of N-TiO 2 @C with well-developed carbon matrices, a unique mesoporous structure, and thermodynamically stable nitrogen atoms are beneficial for high ORR performance because of improved donor density and electrical conductivity as well as overall ORR reactivity [36,37]. and the successful release of the organic molecules during the carbonization step at a high temperature [38,39].…”

Section: Morphological Features Of the Synthesized Fibersmentioning

confidence: 99%

Nitrogen-doped carbon-embedded TiO2 nanofibers as promising oxygen reduction reaction electrocatalysts

Hassen

Shenashen

El‐Safty

et al. 2016

Journal of Power Sources

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Capacitance behaviour of the ammoxidised coal

Cited by 92 publications

References 7 publications

The Large Electrochemical Capacitance of Microporous Doped Carbon Obtained by Using a Zeolite Template

The Large Electrochemical Capacitance of Microporous Doped Carbon Obtained by Using a Zeolite Template

Synthesis of Mesoporous Carbons with Controllable N-Content and Their Supercapacitor Properties

Nitrogen-doped carbon-embedded TiO2 nanofibers as promising oxygen reduction reaction electrocatalysts

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