Mesopore-aspect-ratio dependence of ion transport in rodtype ordered mesoporous carbon

Wang, Da-Wei, Li, Feng, Liu, Min, Lu, Gao Qing and Cheng, Hui-Ming (2008) Mesopore-aspect-ratio dependence of ion transport in rodtype ordered mesoporous carbon. Journal of Physical Chemistry C, 112 26: 9950-9955. doi:10.1021/jp800173z


Author Wang, Da-Wei
Li, Feng
Liu, Min
Lu, Gao Qing
Cheng, Hui-Ming
Title Mesopore-aspect-ratio dependence of ion transport in rodtype ordered mesoporous carbon
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
Publication date 2008-07-03
Year available 2008
Sub-type Article (original research)
DOI 10.1021/jp800173z
Open Access Status DOI
Volume 112
Issue 26
Start page 9950
End page 9955
Total pages 6
Editor G. C. Schatz
Place of publication United States
Publisher American Chemical Society
Language eng
Subject C1
100708 Nanomaterials
850602 Energy Storage (excl. Hydrogen)
Abstract The ion transport behavior in hexagonal ordered mesoporous carbon (OMC, two-dimensional mesopore symmetry) materials with diverse mesopore diameter and length was studied by evaluating the dynamic process of inner-pore electric double layer formation. Scanning electron microscopy and nitrogen cryo-sorption methods were used to probe the mesopore characteristics of these OMC materials and determine their aspect ratios (length/diameter). The interfacial capacitance of the inner-pore electric double layer was greatly decayed when shortening ion transport time by increasing the potential sweep rate of cyclic voltammetry or the alternative current frequency of electrochemical impedance spectroscopy. The better ion transport behavior in mesopores with smaller mesopore aspect ratio was obtained.
Keyword Electrochemical Impedance Spectroscopy
Double-Layer Capacitance
Pore-Size Distribution
Templating Procedure
Porous-Electrodes
Activated Carbons
Supercapacitors
Performance
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 27 Mar 2009, 01:56:14 EST by Amanda Lee on behalf of School of Chemical Engineering