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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

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...
Capacitor With A Dielectric01:18

Capacitor With A Dielectric

Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...

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Updated: Jul 4, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
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Published on: January 7, 2022

High Entropy Metal Organic Framework Incorporated 2D Ti3C2TX MXene for Supercapacitor Application.

Poornima A L1, Nikhil Prabhakar1,2, K Pramoda1

  • 1Centre For Nano and Material Science, Jain (Deemed-to-be University), Bangalore, Karnataka, India.

Chemistry, an Asian Journal
|July 3, 2026
PubMed
Summary

High-entropy metal-organic frameworks (HEMOFs) combined with MXene nanosheets offer superior performance for supercapacitors. This novel HEMOF/MXene composite demonstrates excellent energy storage capacity and stability for advanced energy devices.

Keywords:
Asymmetric supercapacitorHEMOFMXeneSupercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • High-entropy metal-organic frameworks (HEMOFs) are emerging as advanced supercapacitive materials due to their unique structural properties.
  • Coordination defects and lattice distortion in HEMOFs expose diverse redox-active metal centers, enhancing faradaic charge storage and electrode stability.
  • Two-dimensional (2D) MXenes offer high conductivity, surface functionalization, and rapid ion transport pathways, crucial for efficient energy storage.

Purpose of the Study:

  • To synthesize and characterize a novel HEMOF/MXene composite material for high-performance supercapacitors.
  • To investigate the synergistic effects of combining HEMOFs with MXene nanosheets on electrochemical energy storage.
  • To evaluate the supercapacitive performance, including specific capacitance, cyclic stability, and energy/power density, of the developed composite.

Main Methods:

  • Solvothermal synthesis utilizing terephthalic acid to create HEMOF/MXene nanosheets.
  • Characterization of the composite material to confirm uniform HEMOF distribution and prevention of MXene restacking.
  • Electrochemical testing using galvanostatic charge-discharge (GCD) cycles to assess specific capacitance and cycling stability.

Main Results:

  • The HEMOF/MXene (1:1) composite achieved a high specific capacitance of 642.5 F/g at 1 A/g.
  • The composite exhibited excellent coulombic efficiency (100%) and remarkable capacitance retention (90% after 5000 GCD cycles).
  • An asymmetric device demonstrated good cyclic stability with an energy density of 5.424 Wh/kg at a power density of 2398 W/kg.

Conclusions:

  • The synthesized HEMOF/MXene composite material shows significant potential for high-performance supercapacitor applications.
  • The synergistic combination of HEMOFs and MXenes effectively enhances electron/ion transport and pseudocapacitive energy storage.
  • This work highlights a promising pathway for developing next-generation energy storage devices.