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

作者：Lee Deok Yoon; Shinde Dipak V; Kim Eun Kyung; Lee Wonjoo; Oh In Whan; Shrestha Nabeen K^*; Lee Joong Kee; Han Sung Hwan

来源：Microporous and Mesoporous Materials, 2013, 171: 53-57.

DOI：10.1016/j.micromeso.2012.12.039

• Metal-organic-frameworks
• Organic linkers
• Pore sizes
• Morphology
• Supercapacitor

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.

• 出版日期2013-5-1