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Related Concept Videos

Capacitors and Capacitance01:18

Capacitors and Capacitance

A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
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.
Energy Stored in a Capacitor: Problem Solving01:26

Energy Stored in a Capacitor: Problem Solving

In 1749, Benjamin Franklin coined the word battery for a series of capacitors connected to store energy. Capacitors store electric potential energy that can be released over a short time. This property means capacitors have a wide range of applications.
Capacitor-discharge ignition is a type of ignition system commonly found in small engines where the energy released from a capacitor ignites an induction coil that, in turn, fires the spark plug.
To calculate the energy stored in a capacitor 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...
Capacitor in an AC Circuit01:23

Capacitor in an AC Circuit

A capacitor is charged by passing an electric current through it, which causes the plates to start accumulating an electrostatic charge. Since the strength of the charging current is maximum when the capacitor plates are uncharged and gradually decreases exponentially until the capacitor is fully charged, the charging process is neither instantaneous nor linear. The property of a capacitor to store a charge on its plates is called its capacitance.
Consider a purely capacitive circuit consisting...
Capacitors01:15

Capacitors

Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...

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Updated: Jun 5, 2026

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
14:42

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Published on: April 25, 2020

Carbon-based materials as supercapacitor electrodes.

Li Li Zhang1, X S Zhao

  • 1Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117576, Singapore.

Chemical Society Reviews
|August 20, 2009
PubMed
Summary
This summary is machine-generated.

This review summarizes carbon-based electrode materials and electrolytes for supercapacitors. It covers material performance and electrolyte comparisons to guide future high-power and high-energy device development.

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Last Updated: Jun 5, 2026

Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
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Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators

Published on: April 25, 2020

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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
  • Energy Storage

Background:

  • Supercapacitors are crucial energy storage devices.
  • Carbon-based materials are promising for supercapacitor electrodes.
  • Electrolytes significantly impact supercapacitor performance.

Purpose of the Study:

  • To review recent advancements in carbon-based electrode materials for supercapacitors.
  • To highlight the role of electrolytes in supercapacitor technology.
  • To analyze future trends in high-power and high-energy supercapacitors.

Main Methods:

  • Literature review of recent research on carbon-based electrode materials.
  • Discussion of supercapacitor principles and material characteristics.
  • Comparison of aqueous and non-aqueous electrolytes.

Main Results:

  • Overview of various nanostructured carbon-based electrode materials.
  • Analysis of their performance characteristics.
  • Comparison of aqueous and non-aqueous electrolyte solutions.

Conclusions:

  • Carbon-based materials and electrolytes are key to supercapacitor development.
  • Future research should focus on optimizing materials and electrolytes for higher power and energy density.