High Electrochemical Performance Research Articles

Fine phase adjustment optimizes structure stability and sodium ion diffusion ability of Na0.6Mn0.67–xNi0.22Fe0.11+xO2 via chemical environment variation

In this work, Na0.6Mn0.67−xNi0.22Fe0.11+xO2 (x = 0, 0.05, 0.1, 0.15) cathode materials were synthesized by a simple solid-state method, and the influence of Fe/Mn ratio on its fine phase structure and electrochemical performance was emphatically investigated. Firstly, XRD Rietveld refinement demonstrates that proportion of P2 phase and the distance between Na layers increases via increase of Fe/Mn ratio, which is beneficial to improve the diffusion rate of sodium ions. Secondly, reduced proportion of Mn3+ and Ni3+ in the material with the increase of Fe/Mn ratio is verified via XPS data analysis, which weakens Jahn-Teller effect and improves the cyclic stability of the material. Among them, the designed Na0.6Mn0.62Ni0.22Fe0.16O2 exhibits the initial discharge specific capacity 139 mAh g-1 at 0.5 C. The reversible specific capacity of 95 mAh g-1 can be maintained even at a higher current density of 2 C. The high electrochemical performance can be contributed to the lower charge transfer resistance and the higher sodium ion diffusion coefficient, which are evidenced by EIS and GITT analysis.

Synergistic effect of fluorine doping and oxygen vacancies on electrochemical performance of ZnCo2O4 for advanced supercapacitors and Zn-ion batteries

Defects in nanomaterials have been widely used to introduce new properties of pristine materials for electrochemical energy storage. However, most of the research has focused on the effect of single defect while ignoring the synergy of multifold defects on enhancing electrochemical performance. Herein, we have modeled bulk phase oxygen substitution and surface oxygen vacancy on ZnCo2O4 nanowires grown on nickel foam for the first time (F-ZnCo2O4-x), revealing the role of double defects and providing new insights into the effects of electrochemical properties. The enhanced oxygen vacancy concentration and increased active sites enable rapid and sufficient redox reaction of the active components. Therefore, the representative F-ZnCo2O4-x electrode achieves a high specific capacity of 664 mAh·g−1 at 1 A·g−1. Moreover, high energy density (EHSC, 60 Wh·kg−1) and good cycle stability (90.44% capacity retention after 10000 cycles) could be provided as a battery-type electrode of hybrid supercapacitor. The electrodes also have high energy density (Ecell, 692 Wh·kg−1) and good durability (capacity retention of 98.8% after 2000 cycles) when used as zinc ion batteries. This work supplies a new avenue on the universality of defect engineering to design bimetallic oxide with high electrochemical performance.

Tunable Non-Enzymatic Glucose Electrochemical Sensing Based on the Ni/Co Bimetallic MOFs.

Constructing high-performance glucose sensors is of great significance for the prevention and diagnosis of diabetes, and the key is to develop new sensitive materials. In this paper, a series of Ni2Co1-L MOFs (L = H2BPDC: 4,4'-biphenyldicarboxylic acid; H2NDC: 2,6-naphthalenedicarboxylic acid; H2BDC: 1,4-benzenedicarboxylic acid) were synthesized by a room temperature stirring method. The effects of metal centers and ligands on the structure, compositions, electrochemical properties of the obtained Ni2Co1-L MOFs were characterized, indicating the successful preparation of layered MOFs with different sizes, stacking degrees, electrochemical active areas, numbers of exposed active sites, and glucose catalytic activity. Among them, Ni2Co1-BDC exhibits a relatively thin and homogeneous plate-like morphology, and the Ni2Co1-BDC modified glassy carbon electrode (Ni2Co1-BDC/GCE) has the highest electrochemical performance. Furthermore, the mechanism of the enhanced glucose oxidation signal was investigated. It was shown that glucose has a higher electron transfer capacity and a larger apparent catalytic rate constant on the Ni2Co1-BDC/GCE surface. Therefore, tunable non-enzymatic glucose electrochemical sensing was carried out by regulating the metal centers and ligands. As a result, a high-sensitivity enzyme-free glucose sensing platform was successfully constructed based on the Ni2Co1-BDC/GCE, which has a wide linear range of 0.5-2899.5 μM, a low detection limit of 0.29 μM (S/N = 3), and a high sensitivity of 3925.3 μA mM-1 cm-2. Much more importantly, it was also successfully applied to the determination of glucose in human serum with satisfactory results, demonstrating its potential for glucose detection in real samples.

N/S-RCQD@NiCo2S4 nanocomposite with wrinkled nanosheet-like edges as an anode for water splitting

The hybrid of carbon quantum dot nanoparticles wrapped at NiCo2S4 flower-like with nanosheets-like edges is introduced as a desirable nonprecious electrocatalyst for the oxygen evolution reaction, OER, in the alkaline medium. Co (CH3COO)2, Ni(CH3COO)2, thiourea, and carbon quantum dots are used as precursors, with ethylene glycol as a dispersant. Reduced carbon quantum dots (RCQD) are doped with sulfur and nitrogen traces. The core-shell structure increases the contact area between the material and the electrolyte, resulting in higher electrochemical performance. Doping of N/S-RCQD to NiCo2S4 results in improved electrocatalytic performance and stability. The N/S-RCQD@NiCo2S4 only requires a low overpotential of 390 mV for OER at 10 mA.cm−2, owing to many exposed active sites and facilitated diffusion. Furthermore, in 0.1 M KOH for the OER, the N/S-RCQD@NiCo2S4 exhibits outstanding long-term durability. The structure and morphology of N/S-RCQD@NiCo2S4 are studied by field emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier Transform Infrared spectroscopy, UV–Vis absorption and photoluminescence excitation and photoluminescence emission. The core-shell structure facilitates molecular diffusion and adsorption of species. The synergistic effect of Ni and Co also enhances the catalytic properties.

Combining PEDOT:PSS Polymer Coating with Metallic 3D Nanowires Electrodes to Achieve High Electrochemical Performances for Neuronal Interfacing Applications.

This study presents a novel approach to improve the performance of microelectrode arrays (MEAs) used for electrophysiological studies of neuronal networks. The integration of 3D nanowires (NWs) with MEAs increases the surface-to-volume ratio, which enables subcellular interactions and high-resolution neuronal signal recording. However, these devices suffer from high initial interface impedance and limited charge transfer capacity due to their small effective area. To overcome these limitations, the integration of conductive polymer coatings, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) is investigated as a mean of improving the charge transfer capacity and biocompatibility of MEAs. The study combines platinum silicide-based metallic 3D nanowires electrodes with electrodeposited PEDOT:PSS coatings to deposit ultra-thin (<50 nm) layers of conductive polymer onto metallic electrodes with very high selectivity. The polymer-coated electrodeswerefully characterized electrochemically and morphologically to establish a direct relationship between synthesis conditions, morphology, and conductive features. Results show that PEDOT-coated electrodes exhibit thickness-dependent improved stimulation and recording performances, offering new perspectives for neuronal interfacing with optimal cell engulfment to enable the study of neuronal activity with acute spatial and signal resolution at the sub-cellular level.

The fabrication of nickel-based foam/nanotube current collector to support CoNi-based nanosheets for supercapacitors

The CoNi-based hydroxide nanosheets (CoNiNSs) are promising active materials for supercapacitors. At the same time, the fabrication of freestanding electrodes is essential to achieve high electrochemical performance without introducing inactive components. To further improve the utilization of electrochemically CoNiNSs, in this study, a nickel-based foam/tube current collector (NF@NT) is rationally fabricated to support CoNiNSs (NF@NT/CoNiNSs). As expected, the freestanding NF@NT/CoNiNSs-2 electrode with optimum CoNiNSs content exhibits favorable electrochemical performance: (i) in the three-electrode system, the specific capacitance is 4.2 F cm−2 at 10 mA cm−2 and 2.38 F cm−2 at 50 mA cm−2, as well as capacitance retention of 97.1 % after 20,000 cycles at 20 mV s−1; (ii) matched with activated carbon (AC), the capacitance of corresponding NF@NT/CoNiNSs-2//AC device maintains 90.74 % after 27,500 cycles at 50 mA cm−2, which also delivers an energy density of 80.8 Wh kg−1 at a comparable power density of 5997.52 W kg−1.

Oxygen-vacancy-decorated ZnO/NiO@N-doped carbon core-shell microspheres with high electrochemical performance for supercapacitor applications

In this study, ZnO/NiO@NC was prepared using polyvinylpyrrolidone (PVP) as a structural guide and carbon source, and an oxygen-vacancy-rich ZnO/NiO@N-doped carbon shell (ZnO/NiO@NC) electrode material was obtained by annealing under an N2 atmosphere. When the current density of the galvanostatic charge–discharge (GCD) was set to 0.5 A/g, the ZnO/NiO@NC electrode exhibited maximum specific capacitance (860.00 F/g), longer charge/discharge time, and a lower impedance compared with other materials. Its specific capacity was maintained above 80%, indicating that the active material had superior stability owing to encapsulation by the carbon shell. The excellent electrochemical performance is attributed to the formation of an effective p-n heterostructure between ZnO and NiO as the basic skeleton, surface oxygen vacancies, and the rich mesoporous structure after high-temperature reduction calcination. Furthermore, the excellent electrical conductivity of the N-doped carbon shell further improves the electrochemical performance of the material.

Investigating into the intricacies of charge storage kinetics in NbMn-oxide composite electrodes for asymmetric supercapacitor and HER applications

In this paper, we present an effortless hydrothermal method for depositing niobium and manganese composite oxides onto Ni-foam. The formation of the desired NbMn-oxide phase is confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analytical tools. In the study, we systematically investigated the effect of varying Mn concentrations on the physicochemical properties and energy storage performance of the NbMn-oxide composite. The NbMn-oxide exhibited nanoplates assembled from sphere-shaped structures along with irregularly shaped rectangular blocks of nano/micro-structures, forming a porous framework. The electrode with an Mn concentration of 0.02 M displayed an areal capacitance of approximately 5987.8 mF/cm2 and an energy density of 0.13 mWh/cm2, even at a high current density of 10 mA/cm2. Additionally, the hydrogen evolution reaction (HER) performance of the NbMn-oxide composite electrode was evaluated and it exhibited an overpotential of 86 mV to achieve a current density of 10 mA/cm². The electrode also displayed stable performance for approximately 7 h, with only a slight increase in overpotential from − 0.218 to − 0.263 V against the reversible hydrogen electrode (RHE) during the stability test. The investigation of charge storage kinetics revealed the dominance of the diffusion process over the capacitive process, with the quasi-reversible redox reactions in the composite metal-oxides responsible for the high electrochemical performance. The assembled asymmetric supercapacitor device, utilizing NbMn-2 (positive) and activated carbon (negative) electrodes, demonstrated an impressive energy density of 0.20 mWh/cm2 at a power density of 3.75 mW/cm2, coupled with exceptional cyclability (97%). These findings highlight the potential of Nb-based composite electrodes for both supercapacitor and HER water-splitting applications and underscore their significant potential for electrochemical energy conversion and storage.

Structural and chemical engineering of metal-organic framework-derived nickel disulfide nanosheets as the compacted cathode matrix for lithium-sulfur batteries

Lithium-sulfur (Li–S) batteries are recognized as promising high-energy-density storage systems. It is crucial to develop the compacted sulfur cathodes with high sulfur content and high sulfur loading for practical applications. The metal-containing nanosheets are promising cathode matrix to mediate the accompanying problems, such as low sulfur utilization, unavoidable polysulfides shuttling and poor rate performance. Herein, we develop Ni-MOF-based strategy to fabricate nickel disulfide nanosheets on the reduced graphene oxide surface (NSG). Benefiting from nanosheets structure, strong polysulfides affinity, high electronic conductivity and superior electrocatalytic effect of NSG heterostructure, the resultant electrode exhibits high electrochemical performance with 0.021% capacity decay per cycle in 1000 cycles. Remarkably, the electrode with 88 wt% sulfur content and 5.9 mg cm−2 sulfur loading delivers reversible capacity of 945 mA h g−1, areal capacity of 6.1 mA h cm−2 and volumetric capacity of 997 mA h cm−3 at 0.5 C, which is comparable with the state-of-the-art those in the reported energy storage systems. This work provides methodology guidance for the development of cathode matrix to achieve high-energy-density and long-life Li–S batteries.

In situ synthesis of gel polymer electrolyte for lithium-metal anodes with a sulfide-enhanced interface via thiol–ene click chemistry

The high theoretical capacity of Li-metal batteries (LMBs) makes them promising alternatives to Li-ion batteries to meet the increasing demand for advanced energy storage devices. However, high-energy-density LMBs with liquid electrolytes (LEs) are affected by dendrites produced during the inhomogeneous electrochemical deposition of Li. Herein, a novel S-containing gel polymer electrolyte (GPE) is synthesized in situ via thiol–ene click chemistry. The prepared S-containing GPE enables uniform Li deposition, and the resulting Li/Li symmetric cell can show cyclic stability for more than 500 h at a current density of 1 mA cm−2. Furthermore, the fabricated GPE-based LiFePO4/Li cells exhibit capacity retention of up to 91% after 500 cycles at 0.5C, indicating satisfactory stability compared to LE-based cells. The high electrochemical performance of the cells with GPE can be attributed to the formation of a sulfide and organo (poly)sulfide-reinforced hybrid solid electrolyte interface layer, which effectively stabilizes the interface and inhibits the formation of Li dendrites.

Employing ZIF-67 architectures into 2D CoTe-based hybrid composites for exceptionally stable supercapacitor electrode with improved capacitive performance

Large pore volume, exceptional chemical stability, and a high specific surface area are all characteristics that can be achieved in metal organic frameworks (MOFs), and unique class of porous materials if the constituents are carefully chosen. In this study, the electrochemical characteristics of a CoTe/ZIF-67 nanocomposite produced using a straightforward hydrothermal process for usage in supercapacitor systems are analysed. Surface investigation is used to learn about the synthesised materials' surface morphology, and structural analysis has demonstrated that the generated ZIF-67 nanoplates have crystalline structure with particle sizes less than 500 nm, and that they are surrounded by the CoTe and CoTe/ZIF-67 composites. The electrochemical characteristics of the samples were CV, GCD and EIS. Specific capacitance of 2021 Fg−1, energy density of 49.4 W hkg−1, power density of 791 W kg−1, and good cycle stability (remaining at 92% after 5000 cycles) are all indicators that CoTe/ZIF-67 nanocomposite possesses high electrochemical performance, as shown in this study. According to the findings, CoTe/ZIF-67 may serve as a novel electrode material in supercapacitor electrodes, allowing for the creation of high-performance and stable devices for energy storage.

High electrochemical performance of cobalt ions-doped Ni3Se4 boosted by its highly conductive hierarchical framework

Battery-type materials have the intrinsic feature of poor electrical conductivity, significantly affecting their electrochemical performance. At the same time, the low cycling stability of these materials is a key factor weakening the feasibility of their application in supercapacitors (SCs). Although various strategies based on nanoengineering are adopted to address these two issues, it seems that the progress so far does not prove the significant effectiveness of these strategies. In this work, a battery-type material, cobalt ions-doped Ni3Se4, is synthesized using a hydrothermal selenization procedure to address the two issues mentioned above. We preliminarily demonstrate that the electrochemical activity and cycling stability of battery-type materials depend on their intrinsically high conductivity, given that these materials have the proper structure and composition. Based on high electrical conductivity, the cobalt ions-doped Ni3Se4 exhibits high capacitive performance and remarkable cycling stability due to the synergistic effect between Ni and Co and the porous nanosheets self-supported structure. The result of this work proves that the cobalt ions-doped Ni3Se4 with the highly conductive hierarchical framework is a promising electrode material for SCs.

Tuning oxygen release of sodium-ion layered oxide cathode through synergistic surface coating and doping

Layered transition metal oxides have the greatest potential for commercial application as cathode materials for sodium-ion batteries. However, transition metal oxides inevitably undergo an irreversible oxygen loss process during cycling, which leads to structural changes in the material and ultimately to severe capacity degradation. In this work, using density function theory (DFT) calculations, the Ni-O bond is revealed to be the weakest of the M−O bonds, which may lead to structural failure. Herein, the synergistic surface CeO2 modification and the trace doping of Ce elements stimulate oxygen redox and improve its reversibility, thus improving the structural stability and electrochemical performance of the material. Theoretical calculations prove that Na0.67Mn0.7Ni0.2Co0.1O2 (MNC) obtains electrons from CeO2, avoiding destruction of the Ni-O bond by over-energy released during the charging process and inhibiting oxygen loss. The capacity retention was 77.37% for 200 cycles at 500 mA g−1, compared to 33.84% for the unmodified Na0.67Mn0.7Ni0.2Co0.1O2. Overall, the present work demonstrates that the synergistic effect of surface coating and doping is an effective strategy for realizing tuning oxygen release and high electrochemical performance.

Sulfurized poly(o-phenylenediamine) as a novel high-performance solid-phase conversion sulfur cathode

The combination of sulfurized polymer cathode and ester-type electrolyte can realize the solid-phase conversion of sulfur cathode, which is a promising solution of the dissolution issue of Li–S batteries. In this regard, sulfurized polyacrylonitrile (SPAN) is the most famous material and few attempts have been made to challenge it in the past two decades. Herein, we report sulfurized poly(o-phenylenediamine) (SPoPDA) as its supplement or alternative for rechargeable lithium batteries. Compared with SPAN, SPoPDA shows higher ability to covalently bond with sulfur (from ∼50 to ∼60 wt%), similar reversible capacity (∼600 mAh g−1), better cycling stability (with only 2% loss of charge capacity during 100 cycles), and faster reaction kinetics. The molecular structures and electrochemical reaction mechanisms of them have been quantitatively analyzed, and the electrode structure variation of SPoPDA during discharge–charge process has been thoroughly investigated. This work provides not only a novel sulfurized polymer cathode material with low cost, easy synthesis, and high electrochemical performance, but also clearer mechanism understanding of solid-phase conversion sulfur cathode, which are of significant importance for the development of Li–S batteries towards practical application.

Study on Electrochemical Performance of MnO@rGO/Carbon Fabric-Based Wearable Supercapacitors.

In this work, we reported the electrochemical performance of a type of carbon fabric-based supercapacitor by coating MnOx@rGO nanohybrids on carbon fabric with a simple one-step hydrothermal method. We studied the mass ratio of MnOx to rGO on the electrochemical properties of the carbon fabric-based supercapacitors. We found that as the mass ratio is 0.8:1 for MnO@rGO, the supercapacitor with a loading of 5.40 mg cm-2 of MnO@rGO nanohybrids on carbon fabric exhibits a specific capacitance of 831.25 mF cm-2 at 0.1 mA cm-2 current density. It also shows long-term cycling capacitance retention of 97.2% after 10,000 charge-discharge cycles at a current density of 0.4 mA cm-2. We speculate that the high electrochemical performance results from the strong interfacial bonding between the hierarchical architecture of MnO@rGO nanohybrids and carbon fabric.

Durable and High-Performance Thin-Film BHYb-Coated BZCYYb Bilayer Electrolytes for Proton-Conducting Reversible Solid Oxide Cells.

Proton-conducting reversible solid oxide cells are a promising technology for efficient conversion between electricity and chemical fuels, making them well-suited for the deployment of renewable energies and load leveling. However, state-of-the-art proton conductors are limited by an inherent trade-off between conductivity and stability. The bilayer electrolyte design bypasses this limitation by combining a highly conductive electrolyte backbone (e.g., BaZr0.1Ce0.7Y0.1Yb0.1O3-δ (BZCYYb1711)) with a highly stable protection layer (e.g., BaHf0.8Yb0.2O3-δ (BHYb82)). Here, a BHYb82-BZCYYb1711 bilayer electrolyte is developed, which dramatically enhances the chemical stability while maintaining high electrochemical performance. The dense and epitaxial BHYb82 protection layer effectively protects the BZCYYb1711 from degradation in contaminating atmospheres such as high concentrations of steam and CO2. When exposed to CO2 (3% H2O), the bilayer cell degrades at a rate of 0.4 to 1.1%/1000 h, which is much lower than the unmodified cells at 5.1 to 7.0%. The optimized BHYb82 thin-film coating adds negligible resistance to the BZCYYb1711 electrolyte while providing a greatly enhanced chemical stability. Bilayer-based single cells demonstrated state-of-the-art electrochemical performance, with a high peak power density of 1.22 W cm-2 in the fuel cell mode and -1.86 A cm-2 at 1.3 V in the electrolysis mode at 600 °C, while demonstrating excellent long-term stability.

A π-Bridge Spacer Embedded Electron Donor-Acceptor Polymer for Flexible Electrochromic Zn-Ion Batteries.

Zinc-ion batteries (ZIBs) have drawn much attention for next-generation energy storage for smart and wearable electronics due to their high theoretical gravimetric/volumetric energy capacities, safety from explosive hazards, and cost-effectiveness. However, current state-of-the-art ZIBs lack the energy capacity necessary to facilitate smart functionalities for intelligent electronics. In this work, a "π-bridge spacer"-embedded electron donor-acceptor polymer cathode combined with a Zn2+ -ion-conducting electrolyte is proposed for a smart and flexible ZIB to provide high electrochromic-electrochemical performances. The π-bridge spacer endows the polymeric skeleton with improved physical ion accessibility and sensitive charge transfer throughthe cycles, providing extremely stable cyclability with high specific capacity (110 mAhg-1 ) at very fast rates (8 Ag-1 ) and large coloration efficiency (79.8 cm2 C-1 ) under severe mechanical deformation over a long period. These results are markedly outstanding compared to the topological analogue without the π-bridge spacer (80 mAhg-1 at current density of 8 Ag-1 , 63.0 cm2 C-1 ). The design to incorporate a π-bridge spacer realizes notable electrochromism behaviors and high electrochemical performance, which sheds light on the rational development of multifunctional flexible-ZIBs with color visualization properties for widespread usage in powering smart electronics.

Microporous N- and O-Codoped Carbon Materials Derived from Benzoxazine for Supercapacitor Application

Heteroatom-doped porous carbon materials are highly desired for supercapacitors. Herein, we report the preparation of such material from polybenzoxazine (PBZ), a kind of phenolic resin. Four different N- and O-codoped microporous carbon materials were obtained by changing carbonization temperature (600, 700, 800, and 900 °C). Their structures were characterized by scanning electron microscopy (SEM), nitrogen isothermal absorption and desorption, X-ray diffraction (XRD), Raman spectroscopy, elemental analysis and X-ray photoelectron spectroscopy (XPS), and their electrochemical performances were evaluated by cyclovoltammetry (CV) and galvanostatic charge–discharge (GCD) test in a three-electrode system. It was found that the carbon material (C-700) prepared at the carbonization temperature of 700 °C possesses the largest specific surface area (SSA), total pore volume and average pore size among the family, and thus displays the highest specific capacitance with a value of 205 F g−1 at a current density of 0.25 A g−1 and good cycling stability. The work demonstrates that the N- and O-codoped microporous carbon materials with high electrochemical performance can be derived from benzoxazine polymers and are promising for supercapacitor application.

Bioelectricity Production from Microbial Fuel Cell (MFC) Using Lysinibacillus xylanilyticus Strain nbpp1 as a Biocatalyst.

Microbial fuel cells (MFCs) function by using microorganisms to decompose the substrate at the anode, producing electrons and protons. These charges are then transported to the cathode, where electricity is generated. Previous studies have shown their promising probabilities for practical applications. MFCs are praised for their ability to address energy shortages and environmental pollution simultaneously. They have the potential to generate electricity directly from organic substances, reducing energy losses that occur during intermediate conversion steps. The main challenge lies in transitioning these technologies from the laboratory setting to practical systems that can be implemented on a large scale for bioenergy production along with various engineering hurdles. This study focused on investigating the power production potential of a soil-isolated bacterial strain taxonomically classified as Lysinibacillus xylanilyticus nbpp1, which is a relatively new addition to the extensive range of biocatalysts known for their ability to generate electricity. The study analyzed the electrochemical performance of an H-type MFC setup. LB broth was used as the substrate, while aluminum and graphite served as electrode materials. Other parameters, such as Coulombic efficiency, internal resistance, and electrode corrosion rate, were also measured. The MFC produced a high open circuit voltage of 1127mV and achieved a maximum power density of 6.71 mW/cm2 at a current density of 11.14mA/cm2. The MFC setup successfully powered LED lamps when connected in a joint circuit, showcasing its potential for practical applications. These findings suggest the promising high electrochemical performance of the MFC system in terms of electricity generation using the specified conditions.

An electrode for a high-performance asymmetric supercapacitor made of rGO/PANI/PB ternary nanocomposite

The electrodeposition technique was used to create Prussian blue (PB), binary: rGO/PB, PANI/PB, rGO/PANI, and ternary: rGO/PANI/PB nanocomposites. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), and Brunauer–Emmett–Teller (BET) methods were used to describe the samples. The results demonstrated the covering of PB by the rGO and PANI. The electrochemical characteristics of the studied materials were examined using cyclic voltammetry (CV), galvanostatic charge and discharge (GCD), and electrochemical impedance spectroscopy (EIS) in 2 M Na2SO4. The specific capacitance follows the order: rGO/PANI/PB > rGO/PB > PANI/PB > rGO/PANI> PANI > rGO > PB. The rGO/PANI/PB nanocomposite electrode exhibits a specific capacitance of 336 F. g−1 in 2 M Na2SO4 at a discharge current density of 1 A. g−1 with 92 % retention of its original capacitance after 3000 cycles. The remarkable electrochemical performance of the ternary rGO/PANI/PB nanocomposite is attributed to its synergistic effects among individual components. The ternary electrode's high electrochemical performance indicates that it might be employed as an electrode for commercial supercapacitors. An asymmetric supercapacitor (ASC) was built using a positive electrode of rGO/PANI/PB and a negative electrode of activated carbon (AC). The arranged (ASC) operates continuously within the potential range of 0–1.8 V and delivers a high energy density of 56.3 Wh. kg−1 at a power density of 8804 W. kg−1, as well as 92 % retention of its original capacitance after 3000 cycles.