Exploring the charge storage mechanism in high-performance Co@MnO2-based hybrid supercapacitors using Randles–Ševčík and Dunn’s models

Afzal, Amir Muhammad; Muzaffar, Nimra; Iqbal, Muhammad Waqas; Dastgeer, Ghulam; Manzoor, Alina; Razaq, Muhammad; Wabaidur, Saikh Mohammad; Al‐Ammar, Essam A.; Eldin, Sayed M.

doi:10.1007/s10800-023-01939-3

Cited by 28 publications

(2 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Supercapacitors can be categorized into two groups based on their charge storage mechanisms: Electric double-layer capacitors (EDLCs) and pseudocapacitors. The reversible adsorption of charged ions on the surface of carbon electrode material allows the EDL capacitor to store electrostatic charge [8][9][10][11]. Pseudocapacitors, however, store energy through rapid surface reactions involving metal oxides and conducting polymers [12].…”

Section: Introductionmentioning

confidence: 99%

Designing of high performance MoS₂@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection

Imran,

Akhtar,

Muzaffar

et al. 2024

Phys. Scr.

Self Cite

View full text Add to dashboard Cite

Due to their high conductive properties and superior specific capacitance, metal sulfides exhibit remarkable electrical conductivity. Transition metal dichalcogenides (TMDs) are regarded ideal options for energy harvesting devices due to their unique 2D arrangement and remarkable electrochemical properties. In this work, the typical exfoliation method (tip sonication method) was used to synthesize the molybdenum disulfide (MoS2). By using the hydrothermal method, the vanadium zinc sulfide is synthesized. The composite was analyzed through SEM, XRD, and XPS techniques to comprehensively investigate its morphological, structural, and compositional characteristics. The MoS2@VZnS electrode achieved a specific capacity (Qs) of 1025 Cg-1 at 3 mVs-1 after being tested in 1 M KOH. In a two-electrode set-up, activated carbon is used as a negative electrode, and MoS2@VZnS is used as a positive electrode for the fabrication of a hybrid supercapacitor. The asymmetric device has demonstrated a Qs of 285.4 Cg-1 at 1.4 Ag-1. The fabricated asymmetric supercapacitor device has manifested an excellent energy density (Ed) of 39.5 Whkg-1 and power density (Pd) of 2462.35 Wkg-1. Furthermore, in the durability test of MoS2@VZnS//AC, it exhibited an impressive capacity retention of 91.32% after enduring 5,000 cycles. Besides this, an investigation was conducted on a glucose electrochemical sensor utilizing MoS2@VZnS, to enhance its performance. The device showed extraordinary performance and large sensitivity against glucose even up to a very high value. The multifunctional MoS2@VZnS nanocomposite electrode material provides new opportunities to design hybrid devices in energy storage devices and biomedical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Designing of high performance MoS₂@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection

Imran,

Akhtar,

Muzaffar

et al. 2024

Phys. Scr.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Electric double-layer capacitors, or EDLCs, exhibit this buildup by the absorption and desorption of electrolyte ions, whereas pseudocapacitors exhibit it through reversible redox processes occurring at the electrode interface. [10][11][12][13][14] It is commonly acknowledged that the SCs devices are mostly controlled by the properties of the materials used. The exploration of appropriate materials and the design of customized electrode designs that permit the maximum efficacy of the chosen material constitute the key approach for achieving extraordinary performance.…”

mentioning

confidence: 99%

Synthesis of CNTs Doped Nickel Copper-Sulfides Composite Electrode Material for High-Performance Battery-Supercapacitor Hybrid Device

Khan,

Imran,

Afzal

et al. 2023

ECS J. Solid State Sci. Technol.

Self Cite

View full text Add to dashboard Cite

The hybrid supercapacitor combines the outstanding energy density characteristics of batteries with the remarkable durability and unique power characteristics of supercapacitors (SCs). Herein, a hydrothermal technique was applied to produce nickel-copper sulfide (NiCuS), which was later physically embedded into carbon nanotubes. In this study, a three and two electrode measurement systems were studied. To confirm the battery type nature of the electrode materials, a three-electrode assembly was used. For hybrid device, a two-electrode measurement scheme was employed. In the three-electrode setup, the NiCuS@CNT composite revealed a superior specific capacity (Qs) of 1110.0 C g−1. The NiCuS@CNT//AC nanocomposite based hybrid device established a remarkable Qs of 620.9 C g−1. Additionally, the NiCuS@CNT//AC exhibited a remarkable energy density (Ed) of 29.5 Wh kg−1 and a power density (Pd) of 2165.0 W kg−1.This composite material is distinguished for its remarkable capacity retention, maintaining an amazing 88.2% of its capacity after 8000 cycles. This emphasizes its continued stability and the possibility of having a longer operating lifespan. By advancing energy storage technologies, this dynamic integration might provide brand-new, exciting opportunities.

show abstract

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Kim,

Sohn

et al. 2024

Advanced Energy Materials

View full text Add to dashboard Cite

Achieving a high storage capability while maintaining good rate performance using symmetric microsupercapacitors (MSCs) remains challenging. Herein, a 3D symmetric MSC based on interdigitated 3D bicontinuous pseudocapacitive electrodes is proposed to simultaneously attain ultrahigh energy density and ultrafast response. The 3D electrodes comprise electrolytically active MnO2 layers conformally coated onto a 3D periodic porous Ni current collector. In this architecture, the low conductivity of MnO2 can be compensated by efficient charge transport and facile charge transfer without compromising its high capacitance. The 3D MSC with a 1‐V window exhibits an ultrahigh volumetric energy density of 15.8 mWh cm−3 with a high power density of 4.95 W cm−3, outperforming all previously reported MnO2‐based symmetric MSCs. Benefitting from its ultrafast response, the 3D MSC exhibits superiority in terms of the phase angle (−66°), areal capacitance (1400 µF cm−2), and time constant (0.6 ms) at an alternating‐current (AC) frequency of 120 Hz. By using the 3D MSC as a line‐filtering capacitor in a real circuit, the AC signal is effectively smoothed with small residual ripples (≈1.35 mV). Additionally, the device achieves excellent performance in an all‐solid‐state form.

show abstract

Exploring the charge storage mechanism in high-performance Co@MnO2-based hybrid supercapacitors using Randles–Ševčík and Dunn’s models

Cited by 28 publications

References 58 publications

Designing of high performance MoS₂@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection

Designing of high performance MoS₂@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection

Synthesis of CNTs Doped Nickel Copper-Sulfides Composite Electrode Material for High-Performance Battery-Supercapacitor Hybrid Device

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Contact Info

Product

Resources

About

Exploring the charge storage mechanism in high-performance Co@MnO2-based hybrid supercapacitors using Randles–Ševčík and Dunn’s models

Cited by 28 publications

References 58 publications

Designing of high performance MoS2@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection

Designing of high performance MoS2@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection

Synthesis of CNTs Doped Nickel Copper-Sulfides Composite Electrode Material for High-Performance Battery-Supercapacitor Hybrid Device

Ultrahigh Energy Density and Ultrafast Response in Symmetric Microsupercapacitors with 3D Bicontinuous Pseudocapacitance

Contact Info

Product

Resources

About

Designing of high performance MoS₂@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection

Designing of high performance MoS₂@VZnS//AC hybrid battery supercapacitor device for the electrochemical energy storage and glucose detection