Effect of pore size and surface area of carbide derived carbons on specific capacitance

Chmiola, John; Yushin, Gleb; Dash, Ranjan K.; Gogotsi, Yury

doi:10.1016/j.jpowsour.2005.09.008

Cited by 613 publications

(414 citation statements)

References 31 publications

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“…This approach is independent of surface-related properties recently considered by others authors [12,13]. Moreover, with the help of Eq.…”

Section: Resultsmentioning

confidence: 94%

“…The present study develops the approach outlined earlier [7][8][9][10][11] and shows that a good assessment of the gravimetric capacitance at low current densities can be achieved on the basis of immersion calorimetry. Both properties, given respectively in F g -1 and J g -1 , are related to the unit weight of carbon as opposed to other studies more oriented towards the study of surface related capacitances, such as Chmiola et al [12,13] …”

Section: Introductionmentioning

confidence: 99%

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Correlation between heats of immersion and limiting capacitances in porous carbons

Centeno

Fernández

Stoeckli

2008

Carbon

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Based on more than 80 carbons, the paper shows that immersion calorimetry into benzene, water and carbon tetrachloride can be used to assess with a good accuracy the limiting capacitance C o at low current densities in both acidic (2 M H 2 SO 4 ) and aprotic (1M tetraethyl ammonium tetrafluoroborate in acetonitrile) electrolytic solutions. The enthalpies of immersion ∆ i H(C 6 H 6 ) andprovide information on C o-acidic , where both the surface area and the oxygen content play a role. On the other hand, in the case of the organic electrolyte the oxygen content has only a small influence and C o-aprotic is directly related to ∆ i H(C 6 H 6 ) and ∆ i H(CCl 4 ). Carbon tetrachloride has a critical dimension (0.65 nm), which is close to the size of the (C 2 H 5 ) 4 N + ion (0.68 nm) and therefore

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“…This approach is independent of surface-related properties recently considered by others authors [12,13]. Moreover, with the help of Eq.…”

Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Correlation between heats of immersion and limiting capacitances in porous carbons

Centeno

Fernández

Stoeckli

2008

Carbon

View full text Add to dashboard Cite

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“…Alternatively, the accessible surface area can be reduced when parts of the pore structure are not open enough to allow access to the surface. 73 This could mean that only a (size-independent) fraction of the basal plane surface area is accessible. However, the inverse dependence of CV on <N> observed in figure 5C indicates that the either effect must occur to the same degree for all nanosheet thicknesses.…”

Section: Dependence Of Double Layer Capacitance On Nanosheet Sizementioning

confidence: 99%

Electrochemical Applications of Two-Dimensional Nanosheets: The Effect of Nanosheet Length and Thickness

et al. 2016

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Although many electrochemical properties of 2D materials depend sensitively on the nanosheet dimensions, there are no systematic, quantitative studies which analyse the effect of nanosheet size and thickness on electrochemical parameters. Here we use size-selected WS2 nanosheets as a model system to determine the effect of nanosheet dimensions in two representative areas -hydrogen evolution electrocatalytic electrodes and electrochemical double layer capacitor electrodes. We chose these applications as they depend on the interaction of ions with the nanosheet edge and basal plane, respectively, and so would be expected to be nanosheet-size-dependent. The data shows the catalytic current density to scale inversely with mean nanosheet length while the volumetric double layer capacitance scales inversely with mean nanosheet thickness. Both of these results are consistent with simple models allowing use to extract intrinsic quantities, namely the turnover frequency and the double layer thickness respectively.3

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“…The metal leaching results in porous structures with SSAs ranging from 1000 to 3000 m 2 g −1 that have narrow and tunable pore size distributions in the sub-nanometer scale [38,39]. Due to the tunable pore size and high SSA, CDCs show excellent electrochemical performances with specific gravimetric capacitance values of~190 and~120 F g −1 in aqueous and organic electrolytes, respectively [40,41]. The mass densities of these materials are typically in the range of 0.25 to 1.25 g cm −3 , leading to a volumetric capacitance of 160 to 180 F cm −3 .…”

Section: Introductionmentioning

confidence: 99%

Highly densified carbon electrode materials towards practical supercapacitor devices

Zhu

2016

Sci. China Mater.

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Supercapacitors are expected to bridge the gap between conventional electrostatic capacitors and batteries, but have not found significant application in primary energy devices, partly due to some unsolved problems in the electrode materials. A wide range of novel materials such as novel carbons have been investigated to increase the energy density of the electrodes and the volumetric merits of the materials need to be specifically considered and evaluated, towards the practical application of these novel materials. In observation of the intense research activity to improve the volumetric performance of carbon electrodes, the density or mass loading is particularly important and shall be further optimized, both for commercially applied activated carbons and in novel carbon electrode materials such as graphene. In this review, we presented a brief overview of the recent progress in improving the volumetric performance of carbon-based supercapacitor electrodes, particularly highlighting the development of densified electrodes by various technical strategies including the controlled assembly of carbon building blocks, developing carbon based hybrid composites and constructing micro-supercapacitors.

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Effect of pore size and surface area of carbide derived carbons on specific capacitance

Cited by 613 publications

References 31 publications

Correlation between heats of immersion and limiting capacitances in porous carbons

Correlation between heats of immersion and limiting capacitances in porous carbons

Electrochemical Applications of Two-Dimensional Nanosheets: The Effect of Nanosheet Length and Thickness

Highly densified carbon electrode materials towards practical supercapacitor devices

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