Raman V., Gándara F., Mohamed Tahir M.I., Abdul Rahman M.B., Sulaiman Y.
Journal of Electroanalytical Chemistry
Metal-organic frameworks (MOFs) have attracted a lot of attention in the field of energy storage and conversion due to their unique properties, including large specific surface areas, adjustable pore sizes and stable porous structures. Herein, we report a novel porous Mn-based MOF that was prepared through a facile solvothermal method using 1,2,4-triazole (Htrz) organic linker in the presence of N, N’-dimethylacetamide (DMA) as a solvent. The novel [Mn(Htrz)(DMA)Br] denoted as UPMOF-5 crystallised in a monoclinic P21 space group showing a two-dimensional (2D) structure and a large BET surface area of 1725 m2/g. For the first time, the synthesised manganese-1,2,4-triazolate framework (UPMOF-5) was used as an electrode in supercapattery device assembly. Impressively, a battery-graded nature was shown in the three-electrode assembly of the UPMOF-5, which had a decent specific capacity of 160.17 C/g at 0.4 A/g. The designed supercapattery device with UPMOF-5 as a positive electrode and activated carbon as a negative electrode delivered a good specific capacity of 132.40 C/g at 0.4 A/g with 24.77 Wh/kg of specific energy at 538.91 W/kg of specific power. After 10,000 cycles, the device showed promising capacity retention of 70.3 %. The structural stability and porous character of UPMOF-5 are credited with the decent electrochemical performance. © 2022 Elsevier B.V.
