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Related Concept Videos

Energy Stored in a Capacitor01:12

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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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Energy Stored in a Capacitor: Problem Solving01:26

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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.
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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.
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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.
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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.
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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.
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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
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Electrochromic fiber-shaped supercapacitors.

Xuli Chen1, Huijuan Lin, Jue Deng

  • 1State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai, 200438, PR China.

Advanced Materials (Deerfield Beach, Fla.)
|October 24, 2014
PubMed
Summary
This summary is machine-generated.

Researchers created a flexible, fiber-shaped supercapacitor using carbon nanotubes and polyaniline. This wearable device changes color visibly when storing energy and can be woven into textiles for energy storage and signal display.

Keywords:
electrochromic materialsenergy storagefiberssupercapacitors

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Area of Science:

  • Materials Science
  • Energy Storage
  • Nanotechnology

Background:

  • Development of flexible and wearable energy storage devices is crucial for modern electronics.
  • Electrochromic materials offer visual feedback for device status.

Purpose of the Study:

  • To develop a novel fiber-shaped supercapacitor with electrochromic properties.
  • To integrate energy storage and visual signal display in a flexible format.

Main Methods:

  • Fabrication of aligned carbon nanotube/polyaniline composite sheets.
  • Winding composite sheets onto an elastic fiber to create the supercapacitor.
  • Testing electrochemical performance and chromatic transitions.

Main Results:

  • The fiber-shaped supercapacitors exhibited rapid and reversible color changes.
  • The devices demonstrated good electrochemical performance and mechanical flexibility.
  • The supercapacitors were successfully woven into textiles for energy storage and signal display.

Conclusions:

  • This work presents a promising approach for wearable energy storage with integrated visual indicators.
  • The developed electrochromic fiber supercapacitors can be utilized in smart textiles for energy storage and information display.