Facile Synthesis of Vanadium Metal‐Organic Frameworks for High‐Performance Supercapacitors

Abstract

Compared to traditional metal oxides, metal-organic frameworks exhibit excellent properties, such as a high surface area, significant thermal stability, low density, and excellent electrochemical performance. Here, a simple process is proposed for the fabrication of rod-like vanadium metal-organic frameworks (V (O)(bdc), bdc = 1,4-benzenedicarboxylate, or MIL-47), and the effect of the structure on the electrochemical performance is investigated via a series of electrochemical measurements. The V (O)(bdc) electrode exhibits a maximum specific capacitance of 572.1 F g at current densities of 0.5 A g . More significantly, aqueous and solid-state asymmetric supercapacitors are successfully assembled. The solid-state device shows an excellent energy density of 6.72 mWh cm at a power density of 70.35 mW cm . This superior performance confirms that V (O)(bdc) electrodes are promising materials for applications in supercapacitors.

Thermally reduced fluorographenes as efficient electrode materials for supercapacitors

“…This may involve managed changes of morphology during the synthesis of graphene sheets including for instance the creation of different porous 3D structures. [39][40][41] Different ways to boost the capacitance include also the formation of various graphene composites, 42 doping of graphene with heteroatoms, [43][44][45] application of metal oxides 11,[46][47][48] or metal-organic frameworks, [49][50][51][52][53][54] and functionalization of graphene sheets with different molecules through both covalent and noncovalent interactions. [55][56][57] Halogenation of graphite represents an interesting approach to create few-layer graphene-like structures with extraordinary electrochemical properties.…”

Rod-like anhydrous V2O5 assembled by tiny nanosheets as a high-performance cathode material for aqueous zinc-ion batteries

“…1a). In the rst step, MIL-47 was prepared by a facile hydrothermal reaction of VOSO 4 and bdc acid at 160 C. 43 In the second step, the as-obtained MIL-47 was pyrolyzed at 350 C for 4 h in air, thus transforming into RA-V 2 O 5 . The crystalline phase of RA-V 2 O 5 was veried by XRD, as shown in Fig.…”

“…MIL-47 was synthesized according to a previous report. 43 The asobtained MIL-47 was kept in a furnace at 350 C for 4 h in the air atmosphere, thus producing RA-V 2 O 5 . The morphology and microstructure were characterized on JEOL JSM-7600F eld emission scanning electron microscope (FE-SEM), JEOL JEM-2100UHR transmission electron microscope (TEM), and Quantachrome Autosorb-iQ2-MP N 2 adsorption/desorption analyzer.…”

Construction of High‐Nuclear CuxSy Nanocrystalline Catalyst from High‐Nuclear Copper Cluster

“…People's desire for zero pollution and clean energy technologies is important and necessary driver for developing novel energy storage/conversion materials and removing the toxic reagents and solvents in materials. [1][2][3][4] The exploitation of new, green and safe energy storage materials insteading of traditional energy materials and the development of green and efficient catalysts for the pollutant degradation become the urgent demands. So far, amount of catalysts were developed and reported to resolve heavy metal ions and organic dye molecules, from single metals to mixed metals and inorganic complexes.…”