Effect of mesoporosity on specific capacitance of carbons

被引：78

作者：

Fernandez, J. A. ^{[1
]}

Tennison, S. ^{[2
]}

Kozynchenko, O. ^{[2
]}

Rubiera, F. ^{[1
]}

Stoeckli, F. ^{[3
]}

Centeno, T. A. ^{[1
]}

机构：

[1] CSIC, Inst Nacl Carbon, E-33080 Oviedo, Spain

[2] MAST Carbon Int Ltd, Surrey GU3 2AF, England

[3] Univ Neuchatel, Dept Phys, CH-2009 Neuchatel, Switzerland

来源：

CARBON | 2009年 / 47卷 / 06期

关键词：

DOUBLE-LAYER CAPACITANCE; SUPERCAPACITOR ELECTRODE MATERIALS; ACTIVATED CARBONS; PORE-SIZE; NANOPOROUS CARBON; POROUS CARBONS; ADSORPTION;

D O I：

10.1016/j.carbon.2009.02.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The study compares the structural and electrochemical properties of 12 porous carbons based on phenolic resins, using both aqueous (H2SO4) and aprotic ((C2H5)(4)NBF4 in acetonitrile) electrolytes. It appears that they fit into the general pattern observed for other carbons. The present carbons have micropore volumes varying between 0.29 and 0.66 cm(3) g (1) and average pore widths L-o between 0.62 and 1.23 nm. Five samples are exclusively microporous, whereas seven also display a relatively important mesoporosity. This allows a direct comparison between pairs of carbons with similar micropore systems, with and without mesopores, in order to assess the role of mesoporosity in the electrochemical properties. It appears that mesopores have only a limited influence on the decrease in capacitance at high current density as opposed to earlier assumptions. (C) 2009 Elsevier Ltd. All fights reserved.

引用

页码：1598 / 1604

页数：7

共 30 条

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