Fast Charge-discharge Rate Research Articles

Advanced MOF/MXene heterostructure with carbon aerogel to boosts the ions movement in asymmetric supercapacitors and hydrogen production

Supercapacitors represent a promising avenue for advanced energy storage solutions. However, achieving devices that simultaneously possess all the ideal properties, such as high capacitance, fast charge-discharge rates, and excellent cyclability, remains a significant challenge. Herein, a facile approach for fabricating carbon aerogel-induced chromium metal-organic framework (CA@MIL-101) integrated with titanium carbide MXene (CA@MIL-101-(Cr)/Ti3C2Tx) nanocomposites was demonstrated via hydrothermal method. The CA@MIL-101-(Cr)/Ti3C2Tx nanocomposites offer numerous divalent ion active sites and significantly improve charge transfer kinetics, attributed to their interconnected porous structure. This novel anode exhibits an outstanding specific capacity of 1632 Cg-1 with a PVDF binder-based electrode and a high rate of performance. Moreover, a full-cell supercapacitor was developed with carbon aerogel as the cathode and CA@MIL-101 (Cr)/Ti3C2Tx as the anode. With its hierarchical pore structure and functional groups, the CA@MIL-101 (Cr)/Ti3C2Tx anode achieves an energy density of 38 Wh-kg−1, a high-power density of 1280 W-kg−1, and robust anti-self-discharge behavior. The CA@MIL-101 (Cr)/Ti3C2Tx//CA supercapattery uses both adsorption/desorption processes and faradaic reactions for charge storage. The synthesized materials also perform exceptionally well electro-catalytically. This research advances high-performance CA@MIL-101 (Cr)/Ti3C2Tx electrodes, enhances understanding of supercapacitor charge storage, and paves the way for next-generation energy storage technologies.

Electrochemical stability and superior capacitance of bismuth cobalt metal-organic framework incorporated with vanadium disulfide nanosheet for supercapacitor application

The development of a novel supercapacitor electrode material consisting of bismuth and cobalt-based metal-organic framework (MOF) intercalated on vanadium disulfide (VS2) nanosheets (BiCo-MOF@VS2). The composite combines the high porosity and tunable functionality of MOFs with excellent conductivity and high theoretical capacitance of VS2. The MOF structure is designed to incorporate bismuth and cobalt, which enhance electrochemical performance. The VS2 nanosheets provide a conductive support matrix for the MOF, facilitating electron transport and promoting fast charge-discharge rates. Researchers used a suite of techniques to characterize the fabricated electrodes to understand the relationship between material properties and performance. These techniques analyzed the morphology, crystal structure, and electrochemical properties of the materials. The electrochemical performance of BiCo-MOF@VS2 electrodes for supercapacitor applications is investigated using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The research shows that these composite electrodes are highly promising for use in supercapacitors needing top performance. They deliver impressive capacitance, handle rapid charge and discharge cycles well, and maintain stability over time. We found that the electrochemical behavior is optimum when BiCo-MOF@VS2 is used, which is a result of the synergistic effects of VS2 dispersion and the BiCo-MOF. BiCo-MOF and VS2 have shown specific capacitance values of 282 and 199 F g−1, compared to the two electrode materials, BiCo-MOF@VS2 demonstrated an impressive specific capacitance of 472 F g−1 at 1 A g−1, and cyclic stability with 85 % retention even after 3000 cycles at 9 A g−1 current density tested in 1 M KOH solution. This novel material holds promise for developing next-generation supercapacitors with exceptional energy storage capabilities.

Effects of annealing temperature and ion doping on energy storage performance of Na0.5Bi0.5TiO3-Based thin films

Lead-free ferroelectric thin film capacitors offering superb power density and fast charge-discharge rates are ideal for energy storage applications. However, the trade-off relationship between polarization strength and breakdown strength significantly hinders the improvement of energy storage performance. In this work, relaxor-ferroelectric Na0.5Bi0.5TiO3 (NBT) thin films have been deposited on Pt/Ti/SiO2/Si substrate via sol-gel method. First, the energy storage performance of the films is optimized by adjusting the annealing temperature. It is found that the NBT film annealed at 650 °C has both excellent breakdown strength and polarization strength. Then the influence of ion doping on the energy storage performance of NBT films has been studied. An excellent energy storage density of 42.1 J/cm3 and efficiency of 55.8 % are simultaneously achieved in the 2 % Mn-NBT thin film. Additionally, the energy storage performance remains stable within the temperature range of 25–180 °C and frequency range of 500–5000 Hz. The energy storage performance of 2 % Mn-NBT thin film did not decrease significantly after 107 electrical cycles. It is predicted that this work will advance the utilization of Na0.5Bi0.5TiO3-based film capacitors in energy storage systems.

Ultrahigh-temperature capacitors realized by controlling polarization behavior in relaxor ferroelectric

Dielectric film capacitors have drawn much attention in recent years due to the fast charge–discharge rate, while the energy storage performance at ultra-high temperature needs to be satisfied for the increasing demand of the market. Here, we develop an ultrahigh-temperature capacitor of relaxor ferroelectric (RFE) films via controlling polarization behavior. The (110) oriented 0.85BaTiO3-0.15Bi(Mg0.5Zr0.5)O3 (BT-BMZ) thin film, with anisotropic strain and the optimal ratio of extrinsic/intrinsic polarization, exhibits minimized hysteresis loss and maintains maximum polarization. The (110) oriented film capacitor shows giant energy storage density 104.94 J/cm3, with energy storage efficiency 75.83 % BT-BMZ at room temperature. Moreover, the BT-BMZ capacitor achieves excellent thermal stability, from −100 °C to 400 °C, with an energy density 51.61 J/cm3 at an efficiency 79.36 % due to the low leakage current and hysteresis loss. This work demonstrates that the energy storage performance can be enhanced by adjusting the ratio of intrinsic/extrinsic polarization and provides a feasible method for improving high-temperature performance of capacitors.

Synergistic contribution of activated carbon and PEDOT:PSS in hybrid electrodes for high-performance planar micro-supercapacitors

The high-performance miniaturized micro-supercapacitors exhibit great potential due to their inherent properties of high-power density, fast charge–discharge rates, long cycle life, and wide working temperature range. However, there is a need to further enhance the energy density of micro-supercapacitors. In this study, we investigate a hybrid electrode material combination comprising activated carbon (AC) and polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) to fabricate symmetric micro-supercapacitors (SMSCs) and employ the advanced Microplotter technique for the effective loading of active materials onto microelectrodes. The combination of AC and PEDOT:PSS is fine-tuned to attain optimal charge storage. This involves leveraging the synergistic impact of electrical double-layer capacitance from AC and pseudocapacitance from PEDOT:PSS, resulting in enhanced charge storage performance. Additionally, PEDOT:PSS acts as a mixed ion–electron conducting adhesive, effectively binding AC particles together and facilitating the rapid transport of both ions and electrons. As a result, the AC-PEDOT:PSS SMSCs demonstrate an impressive charge storage performance compared to AC SMSCs. At 1 mA/cm2, the measured areal capacitance (device areal capacitances) is 29.5 mF/cm2 (11.8 mF/cm2) for AC-PEDOT:PSS and 15.7 mF/cm2 (6.3 mF/cm2) for AC SMSCs. Furthermore, the areal energies and powers, considering active materials, are found to be 2.79 µWh/cm2 at 0.8 mW/cm2, and considering the device area of the SMSC, they are 1.12 µWh/cm2 at 0.32 mW/cm2. Notably, the AC-PEDOT:PSS SMSCs exhibit a stable long-term capacitance with 85% capacitance retention even after 5000 cycles. This work highlights the significant potential of hybrid materials in improving energy storage performance and showcases the innovative application of the Microplotter technique.

Synthesis Processes of Carbonaceous Material/Conducting Polymer Nanocomposites in Relation to Grafting and Electrochemical Properties for Supercapacitor Application: A Review

Supercapacitors are the energy storage devices that have gained increased attention due to high charge storage capacity, fast charge-discharge rate, high specific power and excellent cycle stability. Recently, research on supercapacitors is focused on the development of new electrode materials prepared by surface engineering to obtain superior electrochemical performance. Carbonaceous materials (CM) such as graphene, graphene oxide (GO), reduced graphene oxide (rGO) and carbon nanotubes (CNTs) etc. and conducting polymer (CP) based composite materials have gained increased attention for their use in supercapacitors. The nanocomposites obtained by merely mixing these two components pose some serious drawbacks such as low conductivity or poor film forming ability. The conjugation of CPs to CMs through covalent bonds is able to address these drawbacks. This review mainly provide collective information about various synthetic strategies to obtain CP grafted CMs for supercapacitor application. Herein, we provide information on different CP-CM conjugation reactions for obtaining the composites and their effects on electrochemical performances. The analysis revealed the importance of CP-CM grafting is important for tuning the electrochemical properties of the materials.

Carbon quantum dots modified and Y3+ doped Ni3 (NO3 )2 (OH)4 nanospheres with excellent battery-like supercapacitor performance.

Supercapacitor is an important energy storage device widely used in the automobile industry, military production, and communication equipment because of its fast charge-discharge rate, and high power density. Herein, carbon quantum dots modified and Y3+ doped Ni3 (NO3 )2 (OH)4 (NiY@CQDs) nanospheres are prepared by a solvothermal method and used as an electrode material. The electrochemical properties of NiY@CQDs were measured in a three-electrode system. An asymmetric supercapacitor (ASC) cell was assembled with activated carbon (AC) as the anode and NiY@CQDs as the cathode. The electrochemical properties of the ASC device were measured in a two-electrode system. Experimental results show the shape of NiY@CQDs is petal-shaped and the introducing carbon quantum dots and doping Y3+ significantly increases the specific surface area, conductivity, and specific capacitance of Ni3 (NO3 )2 (OH)4 . The mass-specific capacitance of NiY@CQDs reaches up to 2944 F g-1 at a current density of 1 A g-1 . The asymmetric supercapacitor of NiY@CQDs//AC has a high energy density of 138.65 Wh kg-1 at a power density of 1500 W kg-1 , displaying a wide range of application prospects in the energy storage area.

Exploring the Role of Carbon Nanotubes in Mitigating the Effects of Climate Change: A Comprehensive Review

‌This article provides the role of carbon nanotubes (CNTs) in mitigating the effects of climate change. CNTs possess unique properties that make them attractive for various applications aimed at addressing climate-related challenges. This review examines the potential contributions of CNTs in key areas, including energy storage, carbon capture and storage (CCS). In the field of energy storage, CNT-based materials demonstrate high-energy density and fast charge-discharge rates, enabling more efficient energy storage and facilitating the integration of renewable energy sources. This advancement offers promising opportunities for reducing reliance on fossil fuels and promoting a sustainable energy landscape. Regarding CCS, CNTs exhibit exceptional adsorption capabilities, making them effective adsorbents for capturing carbon dioxide (CO2) emissions from industrial sources. Additionally, CNTs can serve as catalyst supports for CO2 conversion, enabling the conversion of CO2 into valuable products and contributing to greenhouse gas reduction efforts. In conclusion, carbon nanotubes hold substantial promise in mitigating climate change. Future research and development efforts should focus on optimizing CNT synthesis techniques, functionalization methods, and characterization approaches to fully harness their potential. By advancing the applications of CNTs, we can contribute to a sustainable and low-carbon future.

Insight into the potential of M-NbS2 (M = Pd, Ti and V) monolayers as anode materials for alkali ion (Li/Na/K) batteries.

Doping engineering significantly improves the electrochemical characteristics of electrode materials in alkali ion batteries. Herein, first-principles calculations were performed to systematically explore the effects of metal atom doping in NbS2 monolayers by substituting the Nb atoms with metal M atoms (M = Pd, Ti and V) on the structural stability and electrochemical performances. The results demonstrate that M-NbS2 monolayers can exhibit superior characteristics, including outstanding mechanical flexibility, excellent electronic conductivity, fast charge-discharge rate, low open circuit voltage and high theoretical capacity for alkali ion (Li, Na, and K) storage. Additionally, when alkali ions approach the doping sites of M-NbS2 monolayers, the diffusion energy barriers for Li ions and Na ions can decrease significantly. More importantly, NbS2 monolayers with metal doping can obtain the maximum theoretical capacity of 1470.87 mA h g-1 and the lowest open circuit voltage of 0.17 V. The results of our research can provide a valuable theoretical foundation for the advancement of doped-engineering transition metal chalcogenide monolayers as anode materials in alkali ion battery applications.

From lab to field: Prussian blue frameworks as sustainable cathode materials.

Prussian blue and Prussian blue analogues have attracted increasing attention as versatile framework materials with a wide range of applications in catalysis, energy conversion and storage, and biomedical and environmental fields. In terms of energy storage and conversion, Prussian blue-based materials have emerged as suitable candidates of growing interest for the fabrication of batteries and supercapacitors. Their outstanding electrochemical features such as fast charge-discharge rates, high capacity and prolonged cycling life make them favorable for energy storage application. Furthermore, Prussian blue and its analogues as rechargeable battery anodes can advance significantly by the precise control of their structure, morphology, and composition at the nanoscale. Their tunable structural and electronic properties enable the detection of many types of analytes with high sensitivity and specificity, and thus, they are ideal materials for the development of sensors for environmental detection, disease trend monitoring, and industrial safety. Additionally, Prussian blue-based catalysts display excellent photocatalytic performance for the degradation of pollutants and generation of hydrogen. Specifically, their excellent light capturing and charge separation capabilities make them stand out in photocatalytic processes, providing a sustainable option for environmental remediation and renewable energy production. Besides, Prussian blue coatings have been studied particularly for corrosion protection, forming stable and protective layers on metal surfaces, which extend the lifespan of infrastructural materials in harsh environments. Prussian blue and its analogues are highly valuable materials in healthcare fields such as imaging, drug delivery and theranostics because they are biocompatible and their further functionalization is possible. Overall, this review demonstrates that Prussian blue and related framework materials are versatile and capable of addressing many technical challenges in various fields ranging from power generation to healthcare and environmental management.

Ultra-low loadings of gold nanoparticles significantly boost capacitive energy storage of multilayer polymer composites

Polymer dielectrics have been extensively studied for their high power density and fast charge-discharge rate. It is crucial to balance dielectric constant and breakdown strength to achieve high energy storage...

High-pressure and high-temperature synthesis of black phosphorus-graphite anode material for lithium-ion batteries

Phosphorus-based materials with a high theoretical specific capacity and a fast charge-discharge rate are considered as promising anode materials for high energy density lithium-ion batteries (LIBs). Red phosphorus (RP) and black phosphorus (BP) are two main allotropes to be used as anode materials. However, huge volume expansion during charge-discharge processes hinders the application of RP and BP in LIBs. Composites of phosphorus and carbon-based materials have been extensively fabricated to withstand volume expansion of phosphorus and improve cycle performance. Here, composites of BP and graphite (BP-G) with three P-G mass ratios (8 : 2, 7 : 3, and 6 : 4) have been synthesized by a facile and scalable high-pressure and high-temperature (HPHT) method using RP and graphite composites (RP-G) prepared by ball milling as precursors. Their microstructure and bonding configurations have been analyzed by various characterization techniques. Among three RP-G composites, 7RP-3G exhibits the most excellent cycling stability, a high reversible capacity of 1331 mAh/g after 200 cycles at a current density of 0.78 A/g. However, RP-G composites show poor stability at high current densities. Among three BP-G composites, 6BP-4G shows the best cycle stability at high current densities, a reversible capacity of 634.6 mAh/g after 500 cycles at a current density of 2.6 A/g. Although, the reversible specific capacities of BP-G composites after long cycles are lower than those of RP-G, BP-G composites show more stable cycle performance than RP-G, especially at high current densities. The present work illustrates a direct and facile method to synthesize BP-G composites, and sheds light to explore new synthetic route of BP-based composites.

Tetragonal BN monolayer: A high-performance anode material for lithium-ion batteries

Searching for high-performance anode materials with fast charge-discharge rates, high specific capacity, low open circuit voltages, and good reversibility has attracted much attention over the past few decades. Herein, based on first-principles calculations, the performance of t-BN monolayer as an anode material for Li-ion batteries is investigated. The excellent stretchability of t-BN monolayer makes it good reversibility in the case of volume expansion caused by full adsorption. Additionally, t-BN monolayer with Li-adsorbed possesses metallic behavior, indicating excellent electrical conductivity. Furthermore, t-BN monolayer exhibits well-balanced performances with a low diffusion energy barrier (0.35 eV), a high specific capacity (1620 mA h g−1), an appropriate average open-circuit voltage (0.49 V), and small lattice constants change (2.5%). Finally, solvent effects are considered. The adsorption of Li-ions becomes more stable as dielectric constant of the solvent increases. Based on the above excellent properties, we speculate that t-BN monolayer can act as a promising anode material for LIBs.

Ultrahigh Capacitive Energy Density in Stratified 2D Nanofiller-Based Polymer Dielectric Films.

Dielectric capacitors are critical components in electronics and energy storage devices. The polymer-based dielectric capacitors have the advantages of device flexibility, fast charge-discharge rates, low loss, and graceful failure. Elevating the use of polymeric dielectric capacitors for advanced energy applications such as electric vehicles (EVs), however, requires significant enhancement of their energy densities. Here, we report a polymer thin film heterostructure-based capacitor of poly(vinylidene fluoride)/poly(methyl methacrylate) with stratified 2D nanofillers (Mica or h-BN nanosheets) (PVDF/PMMA-2D fillers/PVDF), that shows enhanced permittivity, high dielectric strength, and an ultrahigh energy density of ≈75 J/cm3 with efficiency over 79%. Density functional theory calculations verify the observed permittivity enhancement. This approach of using oriented 2D nanofillers-based polymer heterostructure composites is expected to be versatile for designing high energy density thin film polymeric dielectric capacitors for myriads of applications.

Enhanced energy storage properties and good stability of novel (1–x)Na0.5Bi0.5TiO3–xCa(Mg1/3Nb2/3)O3 relaxor ferroelectric ceramics prepared by chemical modification

The increase in energy consumption and its collateral damage on the environment has encouraged the development of environment-friendly ceramic materials with good energy storage properties. In this work, (1–x)Na0.5Bi0.5TiO3-xCa(Mg1/3Nb2/3)O3 ceramics were synthesized by the solid-state reaction method. The 0.88Na0.5Bi0.5TiO3-0.12Ca(Mg1/3Nb2/3)O3 ceramic exhibited a high recoverable energy storage density of 8.1 J/cm3 and energy storage efficiency of 82.4% at 550 kV/cm. The introduction of Ca(Mg1/3Nb2/3)O3 reduced the grain size and increased the band gap, thereby enhancing the breakdown field strength of the ceramic materials. The method also resulted in good temperature stability (20–140 °C), frequency stability (1–200 Hz), and fatigue stability over 106 cycles. In addition, an ultrahigh power density of 187 MW/cm3 and a fast charge-discharge rate (t0.9 = 57.2 ns) can be obtained simultaneously. Finite element method analysis revealed that the decrease of grain size was beneficial to the increase of breakdown field strength. Therefore, the 0.88Na0.5Bi0.5TiO3-0.12Ca(Mg1/3Nb2/3)O3 ceramics resulted in high energy storage properties with good stability and were promising environment-friendly materials for advanced pulsed power systems applications.

Improved energy-storage performance with superior thermal stability of [(Bi0.5Na0.5)TiO3](1-x) – [Ba(Ni0.5Nb0.5)O3]x relaxor ferroelectric ceramics

Dielectric ceramic capacitors have been extensively investigated in electronic and high-power electrical systems due to their high-power density, fast charge-discharge rates, brilliant fatigue endurance, and good high-temperature stability. In this study, the dielectric and energy-storage performance of [(Bi0.5Na0.5)TiO3](1-x) –[Ba(Ni0.5Nb0.5)O3]x (x = 0, 0.02, 0.03, 0.04, 0.05, and 0.06) relaxor ferroelectric ceramics were investigated as a function of electric field and temperature. The splitting of (200) reflections in the XRD pattern confirmed the rhombohedral phase with R3c symmetry of all samples. The scanning electron microscopy confirmed that the average grain size gradually increased with doping. The introduction of BNN reduced the temperature of the ferroelectric-antiferroelectric phase transition (Td) and antiferroelectric - paraelectric phase and enhanced the relaxor behavior of BNT ceramics. The value of the recoverable energy density (Wrec) and efficiency (η) increased from 0.049 J/cm3 to 0.627 J/cm3 and 2.13%–61.71% with an increase of x from 0 to 0.06. Further, the Wrec values also showed temperature stability with a variation of less than 8% in the range RT-383 K. Hence, the substitution of BNN in BNT positively affects the overall properties and makes it a promising candidate for energy storage application with superior thermal stability.

Powerful puffing carbonization pretreatment prepared porous carbon for high-performance supercapacitors

Porous carbon as a crucial role in the electrode materials of supercapacitors (SCs) has inspired wide attentions, due to their high electrical conductivity, large specific surface area, excellent electrochemistry stability, and easy availability. Herein, we report the exploration of progressive porous carbon for SCs, which is rationally synthesized using maltose as carbon source via H2O bubbles puffing carbonization assisted KOH activation process. The optimized activated carbon-based architecture exhibits a large specific capacitance of 202.5 F g−1, which is ∼160 % to that of the electrode without H2O bubbles puffing treatment (128.7 F g−1). Moreover, the as-constructed SCs possess high specific capacitance, fast charge-discharge rate, excellent rate capability, and robust cycling stability (96 % capacitance retention after 15,000 charge/discharge cycles), which are better than most of other activated carbon-based SCs ever reported, and indicating their potential application value.

Energy storage in epitaxial multilayered BiFeO3/Na0.5Bi0.5TiO3/La0.7Sr0.3MnO3 thin films

Lead-free dielectric film capacitors with fast charge-discharge rates are ideal for pulsed power capacitors, but their energy storage density lags behind. Lead-free epitaxial multilayered BiFeO3 (BFO)/Na0.5Bi0.5TiO3 (NBT)/La0.7Sr0.3MnO3 (LSMO) films were designed and fabricated by solution processing and the effects of bottom electrodes as well as BFO thickness on microstructures, electrical properties and energy storage performances were investigated. Compared with the NBT film on Pt/Ti/SiO2/Si substrate, the leakage current densities are significantly suppressed and polarizations are obviously improved for the multilayered BFO/NBT/LSMO films. The BFO/NBT/LSMO film with BFO thickness of about 60 nm exhibits a recoverable energy storage density of 37.0 J/cm3 under 2680 kV/cm and excellent performance stability. These results demonstrate that the epitaxial multilayered BFO/NBT/LSMO films are promising candidates for high-power energy storage applications.

Activated Carbon Nanofibers Derived from Thermally Rearranged Polyimides for Binder‐Free Supercapacitors

Supercapacitors (SCs) based on carbon nanofibers (CNFS) are being paid much attention due to their fast charge–discharge rate, high power density, and excellent cyclic stability. Herein, a kind of preferred hydroxyl‐containing poly(amic acid) solution is first synthesized by using 2,2‐bis(3‐amino‐4‐hydroxyphenyl)hexafluoropropane and pyromellitic dianhydride as monomers, and electrospun to prepare nanofiber membranes. Then, thermal imidization, thermally rearranged treatment, and carbonization are employed to successfully fabricate the corresponding hydroxyl‐containing polyimide (HPI)‐CNFs. Next, the activated CNFS are obtained through a simple activation treatment with KOH. After optimizing the concentration of KOH solution, the self‐standing and binder‐free CNF electrode A–HPI–CNFs–1/3 exhibits a maximum specific surface area of 2058 m2 g−1 and pore volume of 1.04 cm3 g−1, leading to a high specific capacitance of 387.7 F g−1 at 0.5 A g−1 and rate capability of 70% at 10 A g−1. In addition, the assembled symmetrical SC device shows outstanding cycle stability performance after 50000 runs of charge–discharge with a specific capacitance retention of 99.93% at 1 A g−1. Finally, the SC demonstrates a specific power of 12.7 Wh kg−1 at a specific energy of 250.0 W kg−1, suggesting potential application prospects in the field of SCs.

Solvothermal synthesis of binder free Ni-MOF thin films for supercapacitor electrodes

To meet the energy demands of many sectors, energy storage systems must have high capacity, long cycling life, excellent energy density, and fast charge discharge rates. Because of their higher power and energy densities compared to other energy storage technologies, supercapacitors have been extensively researched in recent years. In this study, we synthesized binder-free thin films of the Nickel-Metal Organic Frameworks (Ni-MOFs) deposited on stainless steel substrate by using a simple solvothermal method. The Ni-MOF electrodes were systematically studied for their structural, morphological, and electrochemical characterizations. The microstructure of Ni-MOF electrodes varies with reaction concentration (from 0.1 mM to 0.4 mM) at the constant reaction temperature. X-ray diffraction (XRD) study reveals a crystallite phase of Ni-MOF material with a P-1 space group. The FESEM analysis shows a nanosheet-like structure of Ni-MOF material. The Ni-MOF electrode (0.3 mmol concentration) shows the specific capacitance of 850.42 F/g at a current density 1 mA/cm2 with a maximum energy density of 18.66 Wh/kg and power density of 1671 W/kg. These excellent electrochemical results demonstrate the potential of Ni-MOF for supercapacitor applications and provide directions for the development of future high-performance supercapacitor materials.