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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 Capacitors01:10

Energy Stored in Capacitors

A parallel plate capacitor, when connected to a battery, develops a potential difference across its plates. This potential difference is key to the operation of the capacitor, as it determines how much electrical energy the capacitor can store.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
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...
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...
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.
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...

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Related Experiment Video

Updated: May 19, 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

Photo-assisted rechargeable supercapacitors and applications.

Chandu V V Muralee Gopi1, R Ramesh2

  • 1Department of Electrical Engineering, University of Sharjah P. O. Box 27272 Sharjah United Arab Emirates vchandu@sharjah.ac.ae.

RSC Advances
|May 18, 2026
PubMed
Summary
This summary is machine-generated.

Photo-assisted rechargeable supercapacitors (PSCs) integrate solar energy harvesting and storage. These devices show improved performance under illumination, offering a sustainable path for self-powered electronics.

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Last Updated: May 19, 2026

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

Published on: January 7, 2022

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors
10:57

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

Published on: November 30, 2021

Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Photo-assisted rechargeable supercapacitors (PSCs) are emerging hybrid energy storage devices.
  • They uniquely combine solar energy capture with electrochemical charge storage in a single unit.

Purpose of the Study:

  • To review recent advancements in PSCs, covering operational principles, materials, architectures, and performance.
  • To highlight strategies for enhancing energy density and photocharging efficiency.

Main Methods:

  • Focus on asymmetric and integrated architectures utilizing photoresponsive electrodes.
  • Discussion of advanced photoactive materials like transition metal oxides, sulfides, TiO2 nanotubes, and heterostructures.
  • Emphasis on binder-free electrodes, interface engineering, electrolyte optimization, and band-alignment control.

Main Results:

  • Illumination consistently enhances electrochemical performance compared to dark conditions.
  • Optimized PSCs achieve high energy densities (up to ~60.9 Wh kg⁻¹).
  • Improved specific capacitance, energy density, and coulombic efficiency are reported with advanced materials.

Conclusions:

  • PSCs offer a promising avenue for self-powered, miniaturized, and sustainable energy storage.
  • Further research is needed to address challenges in light utilization efficiency, operational stability, and scalable production.
  • Future applications include portable, wearable, and smart electronic devices.