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Development of binary spinel‐type mixed metal oxide and fabrication various morphological heterostructured nanomaterials having two distinct metals paid a wide attention in emerging field. Here, we prepared three dimensional (3D) marigold flower like Ni3V2O8 structure via a simple and facile technique for electrochemical supercapacitor applications...
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Recent research has employed porous
nano metal oxides (MOs) to store electrochemical
energy. Some researchers have been interested in
dual and ternary MOs, and more complicated metal
oxide composite materials utilized in supercapacitors.
This review discusses the electrochemical capacitive efciency of metallic nanostructures doped in
nickel oxide (...
Citations
... The non-rectangular curves with a single pair of redox peaks suggest that faradaic redox reactions occurred between Ni 2+ and Ni 3+ , and Co 2+ and Co 3+ . Moreover, the absence of other redox peaks owing to impurity phases V 4 O 9 , V 2 O 5 , VO 2 , V 3 O 7 , etc., confirm the presence of the Co 3-x Ni x (VO 4 ) 2 ⋅nH 2 O phase only [15,53]. Thus, the reversible redox reaction is as follows: ...
... Additionally, they can undergo various redox reactions due to their numerous oxidation states, which eventually offer higher specific capacitance than binary metal oxides. AB 2 O 4 [27][28][29], A 3 B 2 O 8 [30][31][32], and ABO 4 [33,34] [38]. The last two reports suggest that Ni 3 V 2 O 8 has a high potential to be used as a supercapacitor. ...
We report a study to improve the ternary oxide Ni3V2O8′s electrochemical energy storage capabilities through correct surfactanization during hydrothermal synthesis. In this study, Ni3V2O8 nanomaterials were synthesized in three different forms: one with a cationic surfactant (CTAB), one with an anionic surfactant (SLS), and one without any surfactant. FESEM study reveals that all the synthesized Ni3V2O8 nanomaterials had a small stone-like morphology. The electrochemical study showed that anionic surfactant-assisted Ni3V2O8 (NVSLS) had a maximum of 972 F g⁻¹ specific capacitance at 1 A g⁻¹ current density, whereas cationic surfactant-assisted Ni3V2O8 (NVCTAB) had the lowest specific capacitance of 162 F g⁻¹. The specific capacitance and the capacitance retention of the NVSLS (85% after 4000 cycles) based electrode was much better than that of the NVCTAB (76% after 4000 cycles) based electrode. The improved energy storage properties of the NVSLS electrode are attributed to its high diffusion coefficient, high surface area, and enriched elemental nickel, as compared to the NVCTAB electrode. All these excellent electrochemical properties of NVSLS electrode indicates their potential usage in asymmetric supercapacitor application.
... To cover our energy needs sustainably, it is important to establish a renewable energy source. 1 These are nuclear reactions such as the oxygen evolution reaction (OER), the oxygen reduction reaction (ORR), and the hydrogen evolution reaction (HER) in devices such as fuel cells, water electrolysis, 2 electrolyzers, supercapacitors, 3 and metal−air batteries. 4 However, the OER process can be slow due to multiple electron−proton transfers with high activation barriers, which can hamper the implementation of these technologies. ...
Multifunctional ABO3 perovskite oxide nanomaterial was found to be an exceptional electrocatalyst for the oxygen evolution reaction (OER), a key anodic reaction in water electrolysis. To modify the properties of perovskite oxide electrocatalysts, different activation strategies have been used in recent years. This study uses a combination of two activation strategies, namely, doping and nanocomposite fabrication, to generate a perovskite oxide as an electrocatalyst for the OER. Here, we have demonstrated this by synthesizing LaFeO3 perovskite oxide nanoparticles with different percentages of cobalt doping on the B-site using the sol–gel method. The doping of smaller Co ions on Fe sites led to lattice distortion and compression in the LaFeO3 crystal lattice, leading to microstrains at the grain boundaries and the formation of surface defects. Researchers then anchored composition-optimized doped LaFe0.8Co0.2O3 perovskite nanoparticles onto nickel hydroxide (Ni(OH)2) nanoflowers in the alpha phase by in situ hydrothermal treatment, resulting in the formation of the LaFe0.8Co0.2O3/Ni(OH)2 (LFCO-0.2/Ni(OH)2) nanocomposite. This hybrid nanocomposite showed a low overpotential of 329 mV at j = 10 mA/cm2 and a small Tafel slope of 95 mV dec–1 for the OER. The increased activity of the electrocatalyst is attributed to the texture construction of the 2D Ni(OH)2 nanoflowers decorated with doped LaFeO3 nanoparticles and the synergistic effect between them. The synthesized LFCO-0.2/Ni(OH)2 composite features a large number of active sites and an increased active surface area, resulting in excellent catalytic activity. This approach paves a change in the direction for the rational design of hybrid composites of perovskite nanomaterials with defect engineering for superior OER performance.
... The GCD performance was carried out to assess the cyclic proficiency of the Ni 3 V 2 O 8 -NC electrode at an I t of 50 A/g, as depicted in Fig. 8b. The C s gradually decrease throughout the cyclic process due to the electrode materials' activation process [41,63,74]. Even after 10,000 cycles, the device demonstrates remarkable cyclic stability, with 86.2% retention of its original C s (as shown in the inset figure displaying the last 10 GCD cycles). ...
A nickel-vanadium-based bimetallic precursor was produced using the polymerization process by urea-formaldehyde copolymers. The precursor was then calcined at 800 °C in an argon ambiance to form a Ni3V2O8-NC magnetic nanocomposite. Powerful techniques were used to study the physical characteristics and chemical composition of the fabricated Ni3V2O8-NC electrode. PXRD, Raman, and FTIR analyses proved that the crystal structure of Ni3V2O8-NC included N-doped graphitic carbon. FESEM and TEM analyses imaging showed the distribution of the Ni3V2O8 nanoparticles on the layered graphitic carbon structure. TEM images showed the prepared sample has a particle size of around 10–15 nm with an enhanced active site area of 146 m2/g, as demonstrated by BET analysis. Ni3V2O8-NC nanocomposite exhibits magnetic behaviors and a magnetization saturation value of 35.99 emu/g. The electrochemical (EC) studies of the synthesized Ni3V2O8-NC electrode proceeded in an EC workstation of three-electrode. In a 5 M potassium hydroxide as an electrolyte, the cyclic voltmeter exhibited an enhanced capacitance (CS) of 915 F/g at 50 mV/s. Galvanic charge-discharge (GCD) study also exhibited a superior capacitive improvement of 1045 F/g at a current density (It) of 10 A/g. Moreover, the fabricated Ni3V2O8-NC nanocomposite displays a good power density (Pt) of 356.67 W/kg, improved ion accessibility, and substantial charge storage. At the high energy density (Et) of 67.34 W h/kg, the obtained Pt was 285.17 W/kg. The enhanced GCD rate, cycle stability, and Et of the Ni3V2O8-NC magnetic nanocomposite nominate the sample as an excellent supercapacitor electrode. This study paves the way for developing effective, efficient, affordable, and ecologically friendly electrode materials.
... Haldar et al. have been reported as the flower Ni 3 V 2 O 8 nanostructure and utilised for supercapacitor application. It shows the higher capacitance value of 263.12 F g −1 at 0.5 mA cm −2 [10]. ...
In this work, the construction of 2D nanostructures of rGO/NiMoO4 and FeOCl/BiOCl-based positive and negative electrode materials for asymmetric capacitor devices. Initially, the positive and negative electrodes were investigated through the three electrode systems. The FeOCl/BiOCl electrode was used in the negative potential region of − 0.6 V to 0 V and the rGO/NiMoO4 electrode was used in the positive potential region (0–0.4 V) also these electrode materials exhibit excellent capacitance values of 228 F/g and 424 F/g calibrated at 1 A/g for negative and positive electrodes, respectively. Moreover, the assembled asymmetric capacitor device showed pseudocapacitance behaviour, high capacitance values of 196 F/g at 1 A/g and good cyclic stability of 92% from its initial capacitance value at 10 A/g. Also, the ASC device showed higher energy density and power density values of 49 Wh/kg and 1.031 kW/kg at 1 A/g.
... These novel structures exhibited excellent cathodic behavior in supercapacitors, with a high specific capacity, 32.98 Wh kg −1 energy density at a power density of 189.96 Wh kg −1 along with robust cycling stability [23]. Hari et al. decorated the nickel vanadate microspheres on the acid-treated multi-walled carbon nanotubes using hydrothermal synthesis for lithium-ion batteries. ...
Controlled-engineering on the phase and morphology of the metal vanadates is thought of as an impactful protocol for boosting electrochemical properties in terms of generating active sites and increasing intrinsic conductivity. A new perspective on a high-performance solid-state alkaline battery made of Co-doped Ni3V2O8 (NCV) directly grown on Ni foam (NF) and Bi2O3-NiO composite electrodes, prepared by a simple hydrothermal method, is presented here. Incorporating Co dopants into high-crystalline nickel vanadate with a novel shelf-like architecture enables more electroactive sites, strengthens the electronic conductivity, as well as enriches redox chemistry. The optimized NCV/NF electrode demonstrated consistent cycling behavior and a high discharge specific capacity of 255.82 mAh g−1 at 1 A g−1. Moreover, the counter electrode of the Bi2O3-NiO composite exhibits a nest-like morphology (consisting of NiO nanowires embedded in Bi2O3 nanoflakes) and provides a very high surface area and an optimum discharge specific capacity of 204.76 mAh g−1 (@ 1 A g−1), with good cycling stability. In particular, the solid-state alkaline battery (SSAB) configuration of NCV/NF//Bi2O3-NiO achieves an ultrahigh energy density of 80.4 Wh kg−1 at a power density of 900.86 W kg−1 with nearly 90% of specific capacity retention even after 8000 cycles. The superior performance of the SSAB device indicates promise in the portable electronics and industrial sectors.
... The proposed mechanism aid the reader in effortlessly understanding the fabricated symmetric cell working. The principle behind the charge storage for the symmetric cell based on the MoSe 2 -FeOOH composite electrode is the valency transition associated with the Mo (among +3, +4, +5) and Fe (+2, +3) elements in the prepared sample [51]. During the charging/discharging cycle, the transformation in oxidation states associated with elements Mo and Fe takes place and vice versa. ...
Molybdenum diselenide-based composite has been considered a potential material in the supercapacitor application due to its variable oxidation states, high surface area, and electronic conductivity. This report presents the composite formation of molybdenum diselenide nanoflowers and iron oxide-hydroxide nanorods utilizing a hydrothermal route assisted by room temperature chemical blending technique. The symmetric cell designed based on prepared composite material delivers the specific capacitance of 132 F g-1 for 1 A g-1 for a 1 V voltage. It shows 100 % capacitance retention for 3000 cycles and 100 % coulombic efficiency for 10,000 cycles at 1 A g-1. It provides an energy density of 18.3 Wh kg-1 at 1174 W kg-1 power density. The practical application associated with the designed symmetric cell based on the composite electrode was confirmed via the illumination of the panel comprising 42 red LEDs for 10 minutes effortlessly without break. Additionally, a self-proposed charge mechanism has been incorporated for an enhanced understanding of the reader. The improved results indicate the point that the prepared electrode material has good capability for high-performance supercapacitors.
We successfully synthesised nickel vanadate (NiVO3) nanocomposite by an inexpensive hydrothermal technique. Several analytical methods have been employed to characterise the synthesised nanocomposite. The crystal structure of NiVO3 is orthorhombic, and its crystallite size is around 10.3 nm. The NiVO3 nanocomposite has an optical band gap of 2.62 eV from the absorption spectra analysis. At a current density of 5 Ag-1, the NiVO3 nanocomposite exhibits a specific capacitance value of 398 Fg-1 and a retention rate of almost 90% after 2000 cycles. Furthermore, stability studies show that at a current density of 5 Ag-1, 90% of the capacitance is retained for 4000 cycles. The photocatalytic studies to break down the industrial pollutant Fast Orange Red (F-OR) dye show a 98.7% decolourization rate after 120 minutes of exposure to UV light irradiation. These features promote the creation of such nanocomposites for practical energy and environmental applications while providing a deeper understanding of the material's characteristics.
Modern world has an unparalleled focus on science and technology as an energy storage device as a promising alternative sources to tackle the growing energy crisis and play an important role in economic development. Thus, new approaches and novel promising electrode materials are trying to overcome high energy density without reducing supercapacitors power density and a long lifetime stability. Accordingly, rational flower like structural control of rare earth nickelate-based composite electrodes is also important but very challenging. The role of carbon composites such as single walled carbon nanotube (SWCNT) and multi walled carbon nanotube (MWCNT) with samarium nickelate (SmNiO3) is studied. Herein, the perovskite rare earth SmNiO3, SmNiO3/MWCNT and SmNiO3/SWCNT composites are prepared as potential electrode materials by solvothermal method and never reported before as electrode for supercapacitors. An asymmetric hybrid supercapacitor (SmNiO3/SWCNT//CNT) was fabricated and presented specific capacitance, energy and power density of 170.58 F/g, 53.30 Wh/kg and 749.88 W/kg at 1 A/g. The assembled asymmetric hybrid device exhibited 79.34 % of capacitance retention and 97.52 % of coulombic efficiency even after the continuous 20,000 long cycles. These superior electrochemical properties make the hybrid microflower rare earth nickelate as a good candidate for next generation electrodes in hybrid supercapacitors.
