Supercapacitive property of metal-organic-frameworks with different pore dimensions and morphology

Title
Supercapacitive property of metal-organic-frameworks with different pore dimensions and morphology
Authors
Deok Yoon LeeDipak V. ShindeEun-Kyung KimWonjoo Lee오인환Nabeen K. Shrestha이중기Sung-Hwan Han
Keywords
Metal-organic-frameworks; Organic linkers; Pore sizes; Morphology; Supercapacitor
Issue Date
2013-05
Publisher
Microporous and mesoporous materials
Citation
VOL 171, 53-57
Abstract
Three dicarboxylic acids with different molecular lengths were used as organic linkers to manipulate pore size and surface area of the cobalt based metal–organic-frameworks (MOFs). The pore size and BET surface area of the MOFs were determined and the influence of pore size and surface area on the supercapacitive performance of the MOFs was studied using cyclic voltammetry and chronopotentiometry. Among three MOFs investigated in the present study, the MOF with longer organic linker had larger pores, larger surface area and the MOF film at the electrode surface had a continuously interconnected leaflet like microstructure with less number of structural interfaces which provide the free path for charge transfer. This MOF electrode exhibited highest supercapacitive properties with 179.2 F g-1, 31.4 Wh kg-1, and 5.64 kW kg-1 of specific capacitance, energy density and power density, respectively.
URI
http://pubs.kist.re.kr/handle/201004/44642
ISSN
13871811
Appears in Collections:
KIST Publication > Article
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