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Related Concept Videos

Interfacial Electrochemical Methods: Overview01:06

Interfacial Electrochemical Methods: Overview

Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current passing...
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...
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...
MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no current...
Electrochemical Cells01:28

Electrochemical Cells

Electrochemical cells are systems that convert chemical energy into electrical energy or use electrical energy to drive chemical reactions. They consist of two electrodes in contact with an electrolyte, where redox reactions enable electron transfer. Most electrochemical cells include two half-cells connected by an external wire for electron flow and a salt bridge for ion flow. The salt bridge contains an electrolyte solution and maintains charge neutrality by allowing ions—not electrons—to...
Energy Stored in a Capacitor01:12

Energy Stored in a Capacitor

When an archer pulls the string in a bow, he saves the work done in the form of elastic potential energy. When he releases the string, the potential energy is released as kinetic energy of the arrow. A capacitor works on the same principle in which the work done is saved as electric potential energy. The potential energy (UC) could be calculated by measuring the work done (W) to charge the capacitor.

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Related Experiment Video

Updated: Jun 12, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

Interfacial-Engineered NiZn-MOF@MXene Core-shell Heterostructure for High-Performance Asymmetric Supercapacitors.

Rabia Batool1, Geunchul Kim1, Quanyu He1

  • 1Department of Semiconductor Engineering, Kyung Hee University, Yongin, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)
|June 11, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel NiZn-MOF@MXene core-shell structure for advanced energy storage. This material offers high capacitance and stability, paving the way for next-generation supercapacitors.

Keywords:
MXene hybridsbimetallic MOFshierarchical electrodespseudocapacitive charge storage

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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
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Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Related Experiment Videos

Last Updated: Jun 12, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing efficient energy storage devices with high energy density, rapid charge transport, and long-term stability is crucial for next-generation electronics.
  • Metal-organic frameworks (MOFs) and MXenes show promise for energy storage but face challenges like limited conductivity and restacking.

Purpose of the Study:

  • To synthesize and investigate a hierarchical NiZn-MOF@MXene core-shell heterostructure as an electrode material for high-performance asymmetric supercapacitors.
  • To leverage the synergistic properties of bimetallic MOFs and conductive MXene for enhanced electrochemical performance.

Main Methods:

  • A facile hydrothermal strategy was employed to synthesize the NiZn-MOF@MXene core-shell heterostructure.
  • The material was characterized and tested as an electrode in a three-electrode configuration and in an asymmetric supercapacitor device (NiZn-MOF@MXene//activated carbon).

Main Results:

  • The NiZn-MOF@MXene electrode exhibited a high specific capacitance of 1827 F/g at 1 A/g and 92.4% capacitance retention after 10,000 cycles.
  • The asymmetric supercapacitor achieved an energy density of 84.9 Wh/kg at 3200 W/kg with 90.5% capacitance retention after 10,000 cycles.
  • The core-shell structure effectively prevented MXene restacking and facilitated rapid charge transport and ion diffusion.

Conclusions:

  • The hierarchical NiZn-MOF@MXene core-shell heterostructure demonstrates superior performance for high-performance asymmetric supercapacitors.
  • The synergistic interaction between Ni/Zn redox centers and the MXene framework enhances charge-transfer kinetics and structural stability.
  • This study presents an effective strategy for designing advanced MOF-MXene hybrid electrodes for next-generation energy storage systems.