Role of surface chemistry on electric double layer capacitance of carbon materials

Bleda-Martı́nez, M.J.; Maciá-Agulló, Juan Antonio; Lozano‐Castelló, Dolores; Morallón, Emilia; Cazorla‐Amorós, Diego; Linares-Solano, Á.

doi:10.1016/j.carbon.2005.05.027

Cited by 388 publications

(296 citation statements)

References 27 publications

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“…It is important to highlight here that quinone/carbonyl groups have been claimed to be electroactive specially in acid electrolyte [38], and are clearly observed in the case of ZTC [5], [29]. However, the pseudocapacitance contribution associated to redox reactions of quinonetype groups was similar for the ABA-modified samples (see Fig.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 75%

Successful functionalization of superporous zeolite templated carbon using aminobenzene acids and electrochemical methods

González-Gaitán

Ruiz-Rosas

Nishihara

et al. 2016

Carbon

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A novel and selective electrochemical functionalization of a highly reactive superporous zeolite templated carbon (ZTC) with two different aminobenzene acids (2-aminobenzoic and 4-aminobenzoic acid) was achieved. The functionalization was done through potentiodynamic treatment in acid media under oxidative conditions, which were optimized to preserve the unique ZTC structure. Interestingly, it was possible to avoid the electrochemical oxidation of the highly reactive ZTC structure by controlling the potential limit of the potentiodynamic experiment in presence of aminobenzene acids. The electrochemical characterization demonstrated the formation of polymer chains along with covalently bonded functionalities to the ZTC surface. The functionalized ZTCs showed several redox processes, producing a capacitance increase in both basic and acid media. The rate performance showed that the capacitance increase is retained at scan rates as high as 100 mVs -1 , indicating that there is a fast charge transfer between the polymer chains formed inside the ZTC porosity or the new surface functionalities and the ZTC itself. The success of the proposed approach was also confirmed by using other characterization techniques, which confirmed the presence of different nitrogen groups in the ZTC surface. This promising method could be used to achieve highly selective functionalization of highly porous carbon materials.

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 75%

Successful functionalization of superporous zeolite templated carbon using aminobenzene acids and electrochemical methods

González-Gaitán

Ruiz-Rosas

Nishihara

et al. 2016

Carbon

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“…3a and b based on our data and on data from the literature [25,41,42,44], the specific capacitance in the aqueous H 2 SO 4 and KOH electrolytes is significantly higher for many activated carbons having lower specific surface areas. As shown recently [41][42][43], their better performance is due to the fact that certain oxygencontaining surface complexes also contribute to C 0 in the form of a pseudo-capacitance, to be added to the purely double layer capacitance associated with the surface area [1,5,[41][42][43]. The groups responsible for this contribution are those which desorb as CO in thermally programmed desorption (TPD) and correspond to exposed edges or indentations in the carbon structure.…”

Section: Specific Capacitance At Low Current Densitymentioning

confidence: 99%

Performance of templated mesoporous carbons in supercapacitors

Sevilla

Álvarez

Centeno

et al. 2007

Electrochimica Acta

119

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By analogy with other types of carbons, templated mesoporous carbons (TMCs) can be used as supercapacitors. Their contribution arises essentially from the double layer capacity formed on their surface, which corresponds to 0.14 F m −2 in aqueous electrolytes such as H 2 SO 4 and KOH and 0.06 F m −2 for the aprotic medium (C 2 H 5 ) 4 NBF 4 in CH 3 CN. In the case of a series of 27 TMCs, it appears that the effective surface area determined by independent techniques can be as high as 1500-1600 m 2 g −1 , and therefore exceeds the value obtained for many activated carbons (typically 900-1300 m 2 g −1 ). On the other hand, the relatively low amount of surface oxygen in the present TMCs, as opposed to activated carbons, reduces the contribution of pseudo-capacitance effects and limits the gravimetric capacitance to 200-220 F g −1 for aqueous electrolytes. In the case of non-aqueous electrolyte, it rarely exceeds 100 F g −1 .It is also shown that the average mesopore diameter of these TMCs does not improve significantly the ionic mobility compared with typical activated carbons of pore-widths above 1.0-1.3 nm.This study suggests that activated carbons remain the more promising candidates for supercapacitors with high performances.

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“…It has also been shown that a higher current densities C[j] acidic depends on L o (nm), the average width of the locally slit-shaped micropores and on the surface groups generating CO 2 in TPD [7], Since the ratio of [CO 2 ] to the total amount of oxygen [O] is relatively constant for a variety of activated carbons [7,[14][15][16][17], Eq. (3) can be replaced with a very good approximation by…”

Section: Electrochemistrymentioning

confidence: 99%

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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Role of surface chemistry on electric double layer capacitance of carbon materials

Cited by 388 publications

References 27 publications

Successful functionalization of superporous zeolite templated carbon using aminobenzene acids and electrochemical methods

Successful functionalization of superporous zeolite templated carbon using aminobenzene acids and electrochemical methods

Performance of templated mesoporous carbons in supercapacitors

Correlation between heats of immersion and limiting capacitances in porous carbons

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