Supercapattery Applications Research Articles

Investigating the Redox Behavior of CNT-Enhanced Cr3O4/Ni-MOF for Next-Generation Supercapattery Applications

Investigating the Redox Behavior of CNT-Enhanced Cr3O4/Ni-MOF for Next-Generation Supercapattery Applications

Unraveling the Electrochemical Insights of Cobalt Oxide/Conducting Polymer Hybrid Materials for Supercapacitor, Battery, and Supercapattery Applications.

This review article focuses on the potential of cobalt oxide composites with conducting polymers, particularly polypyrrole (PPy) and polyaniline (PANI), as advanced electrode materials for supercapacitors, batteries, and supercapatteries. Cobalt oxide, known for its high theoretical capacitance, is limited by poor conductivity and structural degradation during cycling. However, the integration of PPy and PANI has been proven to enhance the electrochemical performance through improved conductivity, increased pseudocapacitive effects, and enhanced structural integrity. This synergistic combination facilitates efficient charge transport and ion diffusion, resulting in improved cycling stability and energy storage capacity. Despite significant progress in synthesis techniques and composite design, challenges such as maintaining structural stability during prolonged cycling and scalability for mass production remain. This review highlights the synthesis methods, latest advancements, and electrochemical performance in cobalt oxide/PPy and cobalt oxide/PANI composites, emphasizing their potential to contribute to the development of next-generation energy storage devices. Further exploration into their application, especially in battery systems, is necessary to fully harness their capabilities and meet the increasing demands of energy storage technologies.

Iron-iridium metal organic framework/nitrogen doped MXene/graphene quantum dots: A leading composite for electrolytic energy storage and hydrogen evolution reaction

MXene has recently been the subject of several studies on energy storage. Outstanding qualities that are essential to energy storage applications contain its conductivity, hydrophobicity, and especially significant surface redox reactivity. But while its amazing properties, a few problems seriously restrict its electrochemical efficiency, one of them being the formation of MXene sheets. The gaps between MXene sheets need to be filled with a suitable substance to prevent them from restacking. MOFs have also been thoroughly investigated for electrochemical applications. MOFs have a wide range of uses because of their high crystallinity, porous structure, and large surface area; nevertheless, their effectiveness as electrode materials is restricted by their reduced charging/discharging rate and specific capacity. In order to overcome these drawbacks, it is suggested that MOFs be combined with appropriate materials for improved performance. This work proposes a novel strategy: a composite of graphene quantum dots (GQDs), N-MXene, and iron‑iridium MOF (Ir@Fe-MOF). The limitation of MXene sheet restacking was achieved by reducing each of the ion/electron transportation paths and boosting the electroactive sites, resulting in a remarkable specific capacity in the composite, including MOFs.In a two-electrode assembly, the Ir@Fe-MOF/N-MXene/GQDs exhibited energy and power density of around 43.3 W h kg−1 and 880 W kg−1 respectively. A Coulombic efficiency of 93.06 % and 98.48 % of capacity was maintained by the Ir@Fe-MOF/N-MXene/GQDs/activated carbon (AC) material after 5000 cycles of alternative GCD measurements. The results of this work show that supercapattery applications can gain from the new electrode material Ir@Fe-MOF/N-MXene/GQDs.

Layer-by-layer WS2-Cr heterojunction as a positive working electrode material for high-performance supercapattery applications

This study investigates the impact on the electrochemical performance of pristine sputtered WS2 through the strategic integration of a highly conductive chromium interfacial layer. This study involves the fabrication of two different samples via magnetron sputtering: type I, WS2-sputtered and type II, WS2/Cr (sputtering of Cr as an interfacial layer between sputtered-WS2 and NF). Afterward, structural, topographic and elemental composition of as-synthesized samples were inspected via XRD, SEM, Raman, and EDX. Following this, the energy storage performance were evaluated by employing CV, GCD, and EIS in three and two electrode assembly sequentially. In three electrode testing WS2 and WS2/Cr exhibited the specific capacity (Qs) of 661.79C g−1 and 1600C g−1 at 3 mV/s along with the capacity retention of 61.37 % (WS2) and 83.04 % (WS2/Cr), respectively. Similarly, through GCD WS2 shows the Qs of 637.34C g−1 at 0.8 A/g conversely, WS2/Cr exhibited the Qs of 1220C g−1 at 1.3 A/g. Besides, the WS2/Cr demonstrated long-term longevity (capacity retention of 83.13 %) after 5000 GCD cycles. Based on exclusive electrochemical performance of type II of two samples, an asymmetric battery-type hybrid supercapacitor (WS2/Cr//AC) was fabricated by incorporating WS2/Cr and activated carbon (AC) as working and counter electrodes. WS2/Cr//AC revealed the Qs of 352C g−1 (785F g-1) at 0.7 A/g. Besides, it deliberately delivered 81 Wh kg−1 and 1750 W kg−1 energy and power. The device exhibits excellent cyclic stability by maintaining its capacity after 5000 GCD cycles and illustrated 87.30 % capacity retention. Following that, semi-empirical approach was applied to quantify the capacitive and diffusive currents’ contribution in overall device’s performance. The results highlight that WS2/Cr hold colossal potential to fill the proficiency gap between presently keep-going devices and stern demands of future energy storage applications.

Tailoring Li-ion transport in hybrid biopolymer electrolyte from Maydis stigma for supercapattery applications

Corn Silk Biopolymer (CSBP), a potent biomaterial shed light on offering a sustainable solution to agrowaste and achieve waste valorization. Hybrid Biopolymer Electrolyte (HBPE) was synthesized using corn silk extract by simple solution casting strategy. Freshly synthesized [30wt % CSBP+70 wt % PVDF-Co-HFP] system exemplifies conductivity of 2.35 × 10−8 Scm−1 and while loading 3.2 v/v % LiClO4 salt, the conductivity increased to 4.05 × 10−4 Scm−1 at 25 °C. Structural studies indicate complex formation between the Li+ and polar groups within polymer-salt system. From FTIR studies, prominent peaks noticed at 1651 and 1628 cm−1 are due to the interaction of –C=O group with Li+ and 625 cm−1 for unbound ClO4−.Our best conducting system reveal Li+ ions (tion = 0.98) are the major charge carriers. Electrochemical behaviour from CV demonstrates a good reversibility with a specific capacity (Qs = 25.6 Cg-1) and specific capacitance (Csp = 10.67 Fg-1) at a scan rate of 1 mV s−1. Also, the relation between the peak current with different scan rates for CPL 2 system is estimated from the slope as b = 0.7 suggesting the extraordinary behavior of a hybrid battery and super capacitor offering a unique platform for the sustainable energy storage technology.

“Enhancing electrochemical performance of Fe@Ir/GQDs electrodes with MoS₂ for advanced energy storage and hydrogen evolution Reaction”

Metal-organic frameworks (MOFs) have unique properties that make them important in energy storage systems. The layered structure, edge locations, wide surface area, and closeness impact of MoS2/GQDs nanostructures enhance their ability for energy storage. We are effectively utilizing the hydrothermal technique to synthesize Fe@Ir-MOF/MoS2/GQDs, a new composite electrode material for supercapattery energy storage devices. Using a three-electrode setup, we are assessing the electrochemical performance of Fe@Ir-MOF, Fe@Ir-MOF/MoS2, and Fe@Ir-MOF/MoS2/GQDs. Fe@Ir-MOF/MoS2/GQDs is showing exceptional electrochemical qualities, demonstrating an excellent specific capacity of 1104C/g in an electrolyte solution containing 1 M KOH. The Ir@Fe-MOF/MoS2/GQDs is exhibiting energy and power density of around 53 W h kg−1 and 2652 W kg−1, respectively. A Coulombic efficiency of 92.23 % and 96.14 % of capacity are being maintained by the Fe@Ir-MOF/MoS2/GQDs//AC material after 5000 cycles of alternative GCD measurements. The results of this work are showing that supercapattery applications can benefit from the new electrode material Fe@Ir-MOF/MoS2/GQDs. The HER is having a lower potential barrier of 32.12 mV dec-1 with a 130 mV overpotential at −10 mA cm−2 due to the Fe@Ir-MOF/MoS2/GQDs composite. This work is providing a way to develop effective bimetallic MOFs nanocomposite materials for use in biomedical and future energy storage systems.

ZnS@Fe2O3 core–shell nanorod arrays for supercapattery applications; theoretical evaluation of faradic and non-faradic behavior using Dunn’s model

Supercapattery has emerged as an ideal energy storage device that has the features of both batteries and supercapacitors. In this work, ZnS@Fe2O3 core–shell nanorod arrays supported on Ti foil have been prepared by the cost-effective, efficient, and facile two-step hydrothermal method and investigated for high performance supercapattery applications. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) confirm the successful synthesis of the material, while the scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images clearly show the successful deposition of the Fe2O3 shell over the ZnS core. Electrochemical characterizations including cyclic voltammetry, galvanostatic charge discharge and electrochemical impedence spectroscopy have been employed to investigate the electroactive nature of the materials. It is found that the ZnS@Fe2O3 exhibits excellent specific capacitance of 681 Fg−1 at 1 Ag−1 current density within the potential window of −0.2 to 0.75 V while demonstrating a significant capacitance retention of 85 % and 95 % coulombic efficiency over 2000 cycles. The contribution of faradic and non-faradic processes during electrochemical reactions is evaluated using Dunn’s model. The diffusion controlled mechanism is greater than the surface controlled mechanism in the synthesized material, which depicts the battery grade nature. Interestingly, the electrode was able to exhibit an excellent energy density of 86 Whkg−1 and a maximum power density of 4232 Wkg−1, which is significantly higher than the previously reported ZnS based and Fe2O3 based composites. A Supercapattery device has been assembled using ZnS@Fe2O3 as anode and reduced grapheme oxide (rGO) as cathode, which demonstrate a specific capacitance of 165 Fg−1 at 1 Ag−1 current density, exhibiting 66 Whkg−1 at power density of 3895 Wkg−1 with excellent retention in specific capacitance and coulombic efficiency at 15 Ag−1 after 3000 cycles.

Role of pore hierarchy and Mn incorporation on the electrochemical performance of bimetallic NiMn-LDHs on graphite foil for supercapattery application

In this work, nickel-manganese layered double hydroxides (NiMn-LDHs) are synthesized using hexamethylenetetramine (HMTA) and urea as precipitating agents via hydrothermal synthesis route. The materials have different flower like microstructure and porosity. The effect of microstructures, porosity and mass loading of the LDHs on the overall electrochemical performance is thoroughly studied in this work. It is observed that HMTA assisted NiMn-LDH having open flower like microstructure delivers a high specific capacity of 719 C g−1 at 1 A g–1 and excellent capacity retention of 82.6% and 86% for 10,000 CV and 5000 GCD cycles, respectively. Furthermore, a supercapattery device assembled using NiMn-LDH@HMTA as cathode and activated carbon as anode exhibit high-capacity retention of 80.1% after 5000 GCD cycles along with an energy density of 50 and 34 Wh kg–1 at power densities of 800 and 4000 W kg–1, respectively.

Synergetic supercapattery: Stitching of cobalt zinc manganese oxide and polyaniline matrix for efficient energy storage applications

Optimizing energy storage performance requires the integration of both battery and supercapacitor advantages into a hybrid device. This study focuses on the strategic combination of positive (battery-like) and negative (electrical double layer, EDL) electrode materials in a single device, known as a supercapattery. Cobalt zinc manganese oxide (CZMO) ternary composite and polyaniline (PANI) are synthesized via hydrothermal and polymerization methods, respectively. The CZMO/PANI composite is prepared using a physical blending method. XRD and FTIR analyses confirmed the composition of CZMO/PANI, while surface morphological analysis (FESEM and HRTEM) demonstrated successful intercalation between CZMO nanorods and the PANI matrix. XPS and BET analyses are employed to examine the chemical composition and surface area of the composite. Electrochemical performance of CZMO, PANI, and CZMO/PANI is individually analyzed using a three-electrode system. It is evident that the CZMO/PANI composite exhibits a better specific capacity (340 C g−1) than CZMO and PANI. The two-electrode system (device), embodying CZMO/PANI as the positive electrode and activated carbon as the negative electrode, exhibits promising Specific energy 30.75 Wh kg−1 and specific power 820 W kg−1. Based on these results, it is evident that the CZMO/PANI composite will be a viable option for supercapattery applications.

High-performance rGO@CNTs@AgNbS nanocomposite electrode material for hybrid supercapacitor and electrochemical glucose sensor

Due to its outstanding ability to store energy, the hybrid energy storage system known as the supercapattery has attained a lot of attention. These devices give extraordinary power and energy densities than supercapacitors and batteries. In this research, a hydrothermal method is used to synthesize a composite material with equal amounts of both components (a 50/50 weight ratio) of silver niobium sulfide and doped with rGO@CNT. Its potential is evaluated using a variety of electrochemical investigations, including galvanostatic charge–discharge and cyclic voltammetry measurements. The rGO@CNT@AgNbS is considered the most attractive material for electrodes based on the electrochemical analysis results, with a specific capacity of 2750 C/g. Additional investigations, including cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), XRD, SEM, and a 15000-cycle stability test, are carried out to better understand this asymmetric device. The device displayed a significant energy density of 65 Wh kg−1 and a fantastic power density of 2229 W /k g . Besides, the composite devices are used as an electrochemical glucose sensor to detect glucose. The device showed an extraordinary sensitivity (greater than 95%) up to a small level of glucose. This study demonstrates the excellent achievement of composite rGO@CNT@AgNbS electrodes for supercapattery applications, with tremendous power and energy densities.

Battery-grade silver citrate-nickel hydroxide-multiwalled carbon nanotubes nanocomposites for high-performance supercapattery applications

Supercapacitors, distinguished by their high power density and prolonged cycle stability, have been synergistically combined with battery-grade materials to engineer a supercapattery system. This integration aims to bridge the existing disparities in energy and power densities within energy storage technologies. In our research, we synthesized five distinct battery-grade Ag-citrate-Ni(OH)2-MWCNTs nanocomposite electrodes, labeled as S0-S4 (representing 0–0.72 g of Ag-citrate content), using a sol-gel-assisted hydrothermal method. Notably, the S3 electrode showcased exceptional electrochemical attributes. Advanced characterization techniques confirmed the successful synthesis and revealed distinct morphological features of the materials. Impressively, we recorded specific capacities of 960.16C/g at 2 mV/s and 675C/g at 0.5 A/g, which surpassed the pristine sample by factors of 3.6 and 6.4, respectively. The configured Ag-citrate-Ni(OH)₂-MWCNTs || AC supercapattery device achieved energy and power densities of 49.58 Wh/kg and 425 W/kg at 0.5 A/g and, 13 Wh/kg and 8500 W/kg at 10 A/g, respectively. It also exhibited an 85.76 % capacity retention and a 98.82 % Coulombic efficiency over 3000 cycles. Power law analysis indicated b-values ranging between 0.5 and 1, with a tendency towards 0.5, reinforcing our proposition of a battery-grade supercapacitor. The study demonstrates that the Ag-citrate-Ni(OH)2-MWCNTs nanocomposites, notably S3, hold substantial promise for supercapattery applications, offering enhanced energy storage capabilities, robust cycling stability, and favorable rate performance.

Topotactic transformation of zeolitic imidazolate frameworks into high-performance battery type electrodes for supercapattery application.

Supercapacitors (SCs) are well recognized for their excessive power output and cycling stability, but they often suffer from limited energy density. A promising solution to this challenge is the hybrid supercapattery (HSC) concept, which integrates two different electrodes with disparate charge-storage systems to provide energy and power. In this work, transition-metal phosphides (TMPs), specifically a Cu-doped cobalt phosphide wrapped with an N-doped porous carbon network (CCP-NPC), were used as positive electrode materials in HSCs. With a specific capacitance of 5.99 F cm-2 and a capacitance retention of 87% after 10 000 cycles, the extremely active CCP-5-NPC (5% Cu-doped cobalt phosphide wrapped with an N-doped porous carbon network) exhibits numerous redox sites. The unique structure of CCP-5-NPC, characterized by its cubical shape, coarse surface, and porous structure, greatly enhances the electrochemically active sites (EAS) and specific surface areas (SSA) of the electrode material, facilitating efficient charge transfer kinetics for ions and electrons in HSCs. The potential hybrid supercapattery (CCP-5-NPC||r-GO device) also demonstrated a higher energy density of 0.563 mW h cm-2 at a power density of 4.8 mW cm-2 at 3 mA cm-2 and a cyclic stability of 87.7% after 10 000 cycles. This work provides a basis for the development of highly efficient HSCs in the future by topotactically converting extremely porous materials into energy storage devices.

Hierarchical NiCo-LDH layered composite on PANI coated Ni foam for highly efficient supercapattery applications

Supercapatteries combine the high-power density characteristic of supercapacitors with the high energy density typically found in batteries, offering a promising solution for advanced energy storage applications.

Modulating the structural and magnetic properties of Fe3O4 NPs for high-performance supercapattery and EMI shielding applications

The objective of this article is to meticulously modulate the synthesis parameters of Fe3O4 nanoparticles (NPs) through solvothermal methodology, designed to augment their physicochemical characteristics to enable their application as a high-performance material for microwave electromagnetic interference (EMI) shielding and supercapattery. The microwave dielectric (εr'–jεr″) and magnetic (μr'–jμr″) value is approximately 10.8–j3.9 and 0.73–j0.5, respectively, for the 12-hour (h) synthesized Fe3O4 NPs. Moreover, the dielectric, magnetic, and crystalline characteristics of the 12 h synthesized Fe3O4 NPs exhibit superiority over other variants, resulting in a total electromagnetic shielding effectiveness (EMI SET) of 6.86 dB, which is significantly higher compared to the other samples. In addition, X-band microwave-absorbed materials are evaluated to use them for high-performance supercapattery applications. The 6, 12 and 24 h synthesized Fe3O4 NPs have high retention rates of 95.86, 98.78 and 97.87 % after 1000 cycles at 2 A·g−1 and better Cs values (119.28, 188.262 and 168.89C·g−1 at 2 A·g−1). The 12 h synthesized Fe3O4 NPs show superior power and energy density values for supercapattery performance. It also presents good Asymmetric supercapattery (ASC) Coulombic efficiency maintaining 89.71 % after 5000 cycles at 2 A·g−1. Specifically, introduce a novel two cell battery setup utilizing a Swagelok device. This innovative configuration comprises of Fe3O4 NPs exhibits exceptional storage stability, maintaining its integrity for several seconds (approximately 1–3 s).

Blooming flower like BiOBr decorated RGO nanocomposite as advanced electrode material for high performance supercapattery applications

The present work deals with a synthesis and characterization of bismuth oxybromide decorated reduced graphene oxide (BiOBr/RGO) nanocomposite as working electrode for supercapattery applications. where solvothermal method was adopted for the preparation of BiOBr/RGO nanocomposite. The prepared BiOBr depicts blooming flower-like microspheres and the presence of voids between petals could enable more adsorption of electrolyte ions and also act as conductive channels for easy ion diffusion. Further, the addition of GO with BiOBr resulted in an unfurling flower like morphology for BiOBr/RGO nanocomposite. The BiOBr/RGO (BiOBr – 3 wt% of GO) nanocomposite exhibits supreme specific capacity (Cs) of 3254 C/g at 1 A/g, energy density of 207 Wh/kg at 1 A/g and cyclic stability of 1000 cycles with a capacity retention rate of 97%. These outstanding electrochemical performances suggest that the prepared BiOBr/RGO nanocomposite may serve as a promising working electrode for supercapattery applications in the near future.

One-pot synthesis of hybrid-ternary nickel-oxide decorated polypyrrole/activated carbon nanocomposite as cathode for record-high long life asymmetric supercapattery

Biomass-derived electrode materials, despite their low cost and sustainability, exhibit poor stability, energy density, and cyclic stability, thereby being unsuitable for high-performance supercapacitor applications. To overcome these limitations, we report a one-pot solvothermal synthesis of hybrid ternary nickel-oxide decorated polypyrrole/activated carbon nanocomposite (NPC) for high-performance asymmetric supercapattery applications, wherein NiO and AC are derived from low cost and abundantly available Cactaceae biomass. Detailed morphological studies reveal NiO microspheres decorated within the nanowire-like polypyrrole and carbon nanosheets in the NPC nanocomposite. The optimized NPC electrode delivers 833.06 Fg-1 (416.53 Cg-1) of half-cell specific capacitance of at 1 Ag-1. An asymmetric supercapattery (ASB) device assembled with the NPC and AC as a positive and negative electrode, respectively shows 361.4 Fg-1 (180.7 Cg-1) of cell-specific capacitance at 1 Ag-1 with 98.3 Wh kg−1 of specific energy at 9330.57 Wkg-1 of specific power at 1.4 V and record-high 100% capacitance retention even after 12,000 cycles. This outstanding performance is attributed to the synergetic features of rapid electrolyte-ion diffusion because of the small energy difference between the ions in the NiO, high conductivity of CP and the porous nature with a high surface area of the AC. Thus, the bioorganic framework of NiO nanomaterials and biomass-derived carbon materials has demonstrated a novel route for improving the NPC composite's electrochemical energy storage capability.

Electrosynthesis of semitransparent Ni-Co2-Cux mixed oxide electrode film for novel solid state asymmetric planar supercapattery application

Electrosynthesis of semitransparent Ni-Co2-Cux mixed oxide electrode film for novel solid state asymmetric planar supercapattery application

Metal organic framework derived NiCo layered double hydroxide anode aggregated with biomass derived reduced graphene oxide cathode: A hybrid device configuration for supercapattery applications

Metal-organic frameworks (MOFs), due to its exceptional characteristics like high specific surface area and design diversity, serve as an outstanding sacrificial template in forming layered double hydroxides (LDHs) for highly efficient electrodes in supercapattery devices. In this work, we have prepared bimetallic layered Nickel Cobalt LDH via in-situ etching of Co-ZIF, in different Nickel concentrations directly on Ni foam that enhances the interfacial contact between substrate and the material. The optimised NiCo LDH-2 sample exhibited remarkable electrochemical behaviour with fast electrolyte ion diffusion kinetics ideal for supercapattery device and delivered a high specific capacitance of 2567 Fg−1 at 1 Ag−1. Further, the supercapattery device assembled with Ni-Co LDH as anode and rGO derived from a sustainable source as cathode demonstrated an energy density of 21 Whkg−1, power density of 0.307 kWkg−1 and good cyclic stability with capacitance retention of 88.89 % along with coulombic efficiency of 90.58 % over 1500 cycles. This work proposes an effective approach for designing layered NiCo-LDH that can be further extended to the synthesis of other transition metal-derived LDH for supercapattery devices.

Heterojunction assembled CoO/Ni(OH)2/Cu(OH)2 for effective photocatalytic degradation and supercapattery applications.

Mixed multimetallic-based nanocomposites have been considered a promising functional material giving a new dimension to environmental remediation and energy storage applications. On this concept, a hybrid ternary CoO/Ni(OH)2/Cu(OH)2 (CNC) composite showing sea-urchin-like morphology was synthesized via one-pot hydrothermal approach, and its photocatalytic and electrochemical performances were investigated. The photocatalytic performance was explored using Congo red (CR) as a dye pollutant under visible light illumination. The presence of mixed phases of ternary metal ions could minimize the recombination efficacy of photogenerated charge carriers on the basis of the heterojunction mechanism, resulting in 90% degradation of CR dye (40mg L-1). The effect of scavengers coupled with electrochemical experiments revealed O2-. radical as the predominating species responsible for the degradation of CR. From the electrochemical analysis of CNC, the well-distinguished redox peaks indicated the redox-type nature with a specific capacity of 405 C g-1. For practical applications, an supercapattery (CNC( +)|KOH|AC( -)) was assembled furnishing an energy density of 42 W h kg-1 at a power density of 5160 W kg-1 at 5 A g-1 along with a high capacity retention and coulombic efficiency of 98.83% over 5000 cycles.

MnNbS/Polyaniline Composite‐Based Electrode Material for High‐Performance Energy Storage Hybrid Supercapacitor Device

Hybrid supercapacitor or supercapattery devices have gained significant attention for their impressive power (Pd) and energy densities (Ed), as well as their exceptional cyclic stability compared to traditional storage devices. In this study, manganese niobium sulfide (MnNbS) is synthesized using a hydrothermal method. To enhance the electrochemical performance of MnNbS, polyaniline (PANI) is blended at varying mass ratios. Initially, the electrochemical properties of MnNbS/PANI are evaluated using a three‐electrode configuration, consisting of working, counter, and reference electrodes. At a current density of 2 A g−1, MnNbS/PANI exhibits an improved specific capacity () of 1366 C g−1. Subsequently, to develop a supercapattery energy storage device, a two‐electrode system is constructed. This setup offers enhanced performance and flexibility, making it an ideal choice for high‐performance supercapacitors. Activated carbon (AC) and MnNbS/PANI are employed as the negative and positive electrodes, respectively, in the two‐electrode system. Notably, the device demonstrates outstanding energy density (Ed) of 26.2 Wh kg−1, power density (Pd) of 2072 W kg−1, and specific capacity of 118 C g−1. Furthermore, durability tests involving 1000 charge–discharge cycles reveal a capacity retention of 79%. This study suggests that MnNbS/PANI (at a weight ratio of 80/20%) holds promise as an electrode material for supercapattery applications.