Nitrogenous MOFs and their composites as high-performance electrode material for supercapacitors: Recent advances and perspectives

Iron MOF-Derived Fe2O3/NPC Decorated on MIL-88A Converted Fe3C Implanted Electrospun Porous Carbon Nanofibers for Symmetric Supercapacitors

“…Furthermore, the CV curve demonstrated remarkable symmetry, even at higher scan rates of up to 100 mV s –1 , suggesting favorable kinetics and remarkable stability of the material. Additionally, the highly connected tetragonal rod-like structure of Fe 2 O 3 /NPC on the Fe 3 C/EPCNFs provides nanochannels for electron transport and enhances ion-accessible sites as well as the ion diffusion rate. , …”

“…Additionally, the highly connected tetragonal rod-like structure of Fe 2 O 3 /NPC on the Fe 3 C/ EPCNFs provides nanochannels for electron transport and enhances ion-accessible sites as well as the ion diffusion rate. 60,61 Moreover, using the power law equation (eqs S7 and S8, in Section S1.6 of the Supporting Information), a linear plot of log(i) vs log(v) was developed to analyze the charge storage mechanism of the Fe 2 O 3 /NPC@Fe 3 C/EPCNFs (Figure S7a). According to the results of the current study, the values of b were determined to be 0.94 and 0.90 for anode and cathode, respectively, indicating that the material's predominant charge storage mechanism is capacitively non-faradaic.…”

Energy Storage Kinetics of Hierarchically Designed Co9S8@CoNiO2 Hollow Cubic Supercapacitors with Improved Stability and Energy Density

“…4,5 However, the low energy density, especially for the mainstream commercially used electrical double-layer capacitors (EDLCs), limits the widespread application of SCs in real life. 4,6 To enhance their application potential, it is necessary to further improve the energy storage density of the device. Currently, improving the energy density of SCs is mainly achieved by adjusting their specific capacitance and working voltage window.…”

“…At present, environmental pollution and the energy crisis have attracted increasing worldwide attention, which promoted the demand for the development of efficient, low-cost, clean, and sustainable energy storage devices. − Supercapacitors (SCs) can store and quickly transport electrical energy obtained from intermittent power sources. Compared with batteries, SCs have the advantages of high theoretical power density (>10 kW kg –1 ), fast charging/discharging rate, long lifetime, and excellent energy storage kinetics, demonstrating strong competitiveness in the next-generation energy storage applications. , However, the low energy density, especially for the mainstream commercially used electrical double-layer capacitors (EDLCs), limits the widespread application of SCs in real life. , To enhance their application potential, it is necessary to further improve the energy storage density of the device. Currently, improving the energy density of SCs is mainly achieved by adjusting their specific capacitance and working voltage window.…”

“…For this reason, researchers have worked on synthesizing two-dimensional (2D) nanomaterials with high specific surfaces by micro/nanotechnology to improve the specific surface, i.e., the active sites, of the electrode materials. Metal–organic frameworks (MOFs) are emerging crystalline porous nanomaterials composed of metal ions and organic ligands, which have the advantages of a large specific surface area, diverse structural units, and wide pore size range, which have attracted much attention in energy storage applications in recent years. ,, Despite the many advantages of MOFs, their poor electrical conductivity and stability limit their practical application in electrochemical energy storage. , …”