Dual template approach for the synthesis of hierarchically mesocellular carbon foams

Gan, Li; Tian, Chen; Zhu, Jian; Xu, Zi Jie; Hao, Zhi Xian; Chen, Long Wu

doi:10.1016/j.cclet.2008.10.009

Cited by 5 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Soft templating routes which hired triclock copolymer F127 or P123 as template play important roles because they have been applied on a large scale for the synthesis of mesoporous carbons with large surface areas and uniform pore sizes [11,12] . On the other hand, aroused by the universal existence of hierarchical pore structures in nature, there was increasingly interest in hierarchically porous materials as they combine the advantages of each pore size regime [13] . Carbon materials with different pore size distributions have much more application prospect especially used as electrodes for supercapacitor because macropores are good for the ionic transportation and meso/micropores supply high specific surface area, both of which contribute to the total capacitance of the materials.…”

Section: Introductionmentioning

confidence: 99%

Double Templating Synthesis and Electrochemical Properties of Carbon Foams

Gan

Yang

et al. 2011

AMR

View full text Add to dashboard Cite

In this paper, we demonstrated the synthesis and electrochemical properties of carbon foams for use as supercapacitor electrode materials. Carbon foams were prepared by double templating method in which emulsion and nanosilica were used as soft template and hard template, respectively. By using Span 80 and Tween 80 as emulsifiers, resorcinol/formaldehyde aqueous solution which contained nanosilica as aqueous phase and 1iquid paraffin as oil phase, an O/W emulsion was obtained. Carbon foams were obtained by emulsion polymerization, carbonization and the subsequent removal of the hard template. The as-prepared carbon foams were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) analyzer, and electrochemical workstation. The results indicate that the resultant carbon foams have specific surface area of 160 m2/g, total pore volume of 0.15 cm3/g and possess dual pore size distributions with macropore sizes of 0.5-2.0 μm and the most probable pore size of 4.1 nm. The electrochemical properties of the carbon foams have been investigated by cyclic voltammetry (CV) and galvanostatic charge- discharge with a three-electrode system in electrolyte of 6 mol/L KOH solution. The CV curves of the carbon foams show rectangular-like shape without obvious oxidation-reduction evolution peak, which suggests a typical nonfaradic adsorption/desorption reaction. The carbon foams present linear galvanostatic charge-discharge curve under the current densities of 1.0-5.0 A/g and their specific capacitance values are 60-90 F/g. The good electrochemical performances of carbon foams would provide candidate as electrode materials for supercapacitors.

show abstract

Section: Introductionmentioning

confidence: 99%