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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...
Equivalent Capacitance01:19

Equivalent Capacitance

Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
Equivalent Capacitance01:19

Equivalent Capacitance

From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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: Jul 10, 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

One-Dimensional POM-Based Material Combining Proton Conductivity and Supercapacitor Performance: Synthesis,

Jia-Yuan Wang1, Si-Bing Zhou1, Xiao-Li Hu1

  • 1School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, People's Republic of China.

Inorganic Chemistry
|July 8, 2026
PubMed
Summary

A new polyoxometalate material, CUST-580, enhances proton conduction and supercapacitor performance. This hourglass-shaped material offers a promising solution for advanced energy conversion and storage devices.

Related Experiment Videos

Last Updated: Jul 10, 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

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Conventional energy materials face limitations in proton conduction and energy storage.
  • Developing novel materials is crucial for advancing energy conversion and storage technologies.

Purpose of the Study:

  • To design and synthesize a novel one-dimensional polyoxometalate material for improved proton conduction and supercapacitor performance.
  • To investigate the proton conduction mechanism and electrochemical properties of the synthesized material.

Main Methods:

  • Synthesis of a one-dimensional hourglass-shaped P4Mo6-based polyoxometalate, (H2dpe)4[Fe2(H3P4Mo6O31)2]·6H2O (CUST-580).
  • Characterization of the material's structure, including hydrogen-bonding network formation.
  • Proton conduction tests at 90 °C and 98% relative humidity.
  • Supercapacitor performance evaluation using cyclic voltammetry and galvanostatic charge-discharge in a mixed electrolyte.

Main Results:

  • CUST-580 exhibited a proton conductivity of 4.01 × 10^-3 S cm^-1 via the Grotthuss mechanism.
  • The material demonstrated excellent structural integrity and long-term stability.
  • As a supercapacitor, CUST-580 achieved a specific capacitance of 361 F g^-1 at 1 A g^-1 with 85.21% retention after 1500 cycles.

Conclusions:

  • CUST-580 synergistically optimizes proton conduction and supercapacitor performance.
  • The material presents a new candidate for high-performance energy conversion and storage devices.
  • The design concept offers insights for developing advanced functional materials.