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Related Concept Videos

Capacitor With A Dielectric01:18

Capacitor With A Dielectric

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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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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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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.
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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.
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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...
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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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Transparent and Flexible Supercapacitors with Networked Electrodes.

S Kiruthika1, Chaitali Sow1, G U Kulkarni1,2

  • 1Chemistry and Physics of Materials Unit and Thematic Unit of Excellence in Nanochemistry, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bangalore, 560064, India.

Small (Weinheim an Der Bergstrasse, Germany)
|August 24, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed transparent and flexible supercapacitors using gold nanowires and manganese dioxide. These devices offer high transparency and stable energy storage, paving the way for advanced electronics.

Keywords:
crackle templateflexible energy storagemetal wire networktransparent supercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Transparent and flexible energy storage devices are crucial for next-generation electronics and displays.
  • Current challenges include achieving both high energy storage capacity and high optical transparency.

Purpose of the Study:

  • To develop a simple fabrication method for transparent and flexible supercapacitors.
  • To achieve high areal capacitance and excellent cycling stability with high transmittance.

Main Methods:

  • Fabrication of electrodes using gold (Au) wire networks via a crackle template method.
  • Coating Au networks with manganese dioxide (MnO2) nanostructures through electrodeposition.
  • Utilizing a membrane separator as a substrate to enhance transparency and electrolyte interaction.

Main Results:

  • Achieved supercapacitors with approximately 75% visible transparency.
  • Demonstrated an areal capacitance of approximately 3 mF cm⁻².
  • Exhibited high stability with over 5000 cycles of charging and discharging.

Conclusions:

  • The developed method enables the fabrication of highly transparent and flexible supercapacitors.
  • The unique substrate design enhances energy storage capacity and device performance.
  • This approach offers new possibilities for creating advanced transparent electronic devices.