Electric double layer capacitance on hierarchical porous carbons in an organic electrolyte

被引：50

作者：

Yamada, Hirotoshi ^{[1
]}

Moriguchi, Isamu ^{[1
]}

Kudo, Tetsuichi ^{[2
]}

机构：

[1] Nagasaki Univ, Fac Engn, Nagasaki 8528521, Japan

[2] Natl Inst Adv Ind Sci & Technol, Tsukuba Cent 2, Tsukuba, Ibaraki 3058568, Japan

来源：

JOURNAL OF POWER SOURCES | 2008年 / 175卷 / 01期

关键词：

porous carbon; micropore; electric double layer capacitor; organic electrolyte; hierarchical pore;

D O I：

10.1016/j.jpowsour.2007.09.037

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：

Nanoporous carbons were prepared by using colloidal crystal as a template. Nitrogen adsorption/desorption isotherms and transmission electron microscope images revealed that the porous carbons exhibit hierarchical porous structures with meso/macropores and micropores. Electric double layer capacitor performance of the porous carbons was investigated in an organic electrolyte of I M LiClO4 in propylene carbonate and dimethoxy ethane. The hierarchical porous carbons exhibited large specific double layer capacitance of ca. 120 F g(-1) due to their large surface areas. In addition, the large capacitance was still obtained at a large current density up to 10 A g(-1), which satisfies demands from the high power application such as hybrid electric vehicles. Capacitance analysis of the hierarchical porous structures revealed the contribution of meso/rnacropores and micropore to the electric double layer capacitance to be 8.4 and 8.1 mu F cm(-2), respectively. The results indicated electric double layer is formed even when solvated ions are larger than pore diameters. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：651 / 656

页数：6

共 21 条

[1] Lithium-ion transfer at the interface between lithium-ion conductive ceramic electrolyte and liquid electrolyte - A key to enhancing the rate capability of lithium-ion batteries [J].