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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

863
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
863

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Cu@Fe-Redox Capacitive-Based Metal-Organic Framework Film for a High-Performance Supercapacitor Electrode.

Supriya A Patil1, Pranav K Katkar2, Mosab Kaseem1

  • 1Department of Nanotechnology & Advanced Materials Engineering, Sejong University, Seoul 05006, Republic of Korea.

Nanomaterials (Basel, Switzerland)
|May 27, 2023
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Summary

Copper-doped iron-based metal-organic frameworks (MOFs) show enhanced performance as electrode materials for supercapacitors. This novel Cu@Fe-MOF/NF material offers high capacitance and durability for energy storage devices.

Keywords:
Cu-doped Fe-MOFbimetallic redox capacitivedrop-cast filmsupercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Metal-organic frameworks (MOFs) are promising electrode materials for supercapacitors due to their porosity and redox capacitive sites.
  • Doping MOFs can modify their electronic structure and surface reactivity, potentially enhancing electrochemical performance.
  • Iron-based MOFs are actively researched for energy storage applications.

Purpose of the Study:

  • To synthesize and characterize a copper-doped iron-based MOF (Cu@Fe-MOF/NF) thin film on a nickel foam substrate.
  • To evaluate the electrochemical performance of the Cu@Fe-MOF/NF material as an electrode for supercapacitors.
  • To assess the performance of an asymmetric solid-state supercapacitor device utilizing the developed electrode.

Main Methods:

  • Drop-casting of Cu@Fe-MOF/NF thin film onto a 3D-nickel foam (NF) substrate.
  • Electrochemical characterization including specific capacitance measurements at various current densities.
  • Fabrication and testing of an asymmetric solid-state supercapacitor (ASSSC) device using Cu@Fe-MOF/NFǁrGO/NF electrodes.

Main Results:

  • The Cu@Fe-MOF/NF electrodes exhibited a unique micro-sized bipyramidal structure with nanoparticles.
  • A high specific capacitance of 420.54 F g⁻¹ at 3 A g⁻¹ was achieved, which is double that of the undoped Fe-MOF/NF.
  • The ASSSC device demonstrated an energy density of 44.20 Wh.kg⁻¹ and 88% capacitance retention after 5000 cycles.

Conclusions:

  • Copper doping significantly enhances the electrochemical performance of iron-based MOF electrodes for supercapacitors.
  • The Cu@Fe-MOF/NF material shows excellent potential for high-performance electrochemical energy storage.
  • The developed ASSSC device exhibits promising energy density and long-term cycling stability.