Abstract

A manganese metal-organic framework (Mn-MOF) has been synthesized using a low-temperature solvothermal procedure in
the presence of terephthalic acid and 1-methylimidazole in dimethylformamide. The crystal structure studies were made and
found that the molecule has a three dimensional framework in which the θ ranges from 5.942 to 50 with monoclinic I2/a space
group. The final full matrix least-square refinement over F2 is converged on R1 = 0.0558, wR2 = 0.1696 through goodness-of-
fit = 1.095. The surface area of the Mn-MOF has been measured by Brunauer–Emmett–Teller method and the surface area
was found to be 1.2352 m2/g. The average pore diameter and pore volume were about 2.6 nm and 0.00569 cc/g, respectively.
The electrochemical studies were made by cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance
spectroscopy techniques and found that the Mn-MOF has high charge storage capacity up to 4000 Fg-1, which reflects the
supercapacitor behaviour of the material. Also Mn-MOF material exhibits the energy density up to 500 (Whkg-1) and the
power density of about 0.125 (Wkg-1). These values imply that the Mn-MOF can be an efficient material for electrochemical
supercapacitor/other energy storage application.