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Related Concept Videos

MOS Capacitor01:25

MOS 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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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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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 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 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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Amorphous titanium-oxide supercapacitors.

Mikio Fukuhara1, Tomoyuki Kuroda1, Fumihiko Hasegawa1

  • 1New Industry Creation Hatchery Center, Tohoku University, Sendai, 980-8579 Japan.

Scientific Reports
|October 22, 2016
PubMed
Summary
This summary is machine-generated.

Amorphous titanium dioxide (TiO2-x) supercapacitors exhibit high capacitance due to van der Waals attraction and enhanced electron trapping. These devices demonstrate stable performance and potential for advanced applications.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • The electric capacitance of amorphous titanium dioxide (TiO2-x) surfaces is influenced by surface properties and charge interactions.
  • Understanding these properties is crucial for developing advanced energy storage devices.

Purpose of the Study:

  • To investigate the relationship between amorphous TiO2-x surface properties and electric capacitance.
  • To demonstrate the performance of a supercapacitor constructed with amorphous TiO2-x.
  • To explore the potential of amorphous TiO2-x in energy storage applications.

Main Methods:

  • Fabrication of a supercapacitor using amorphous TiO2-x with a distributed constant-equipment circuit.
  • Characterization of the supercapacitor's electrical properties, including capacitance and dielectric breakdown voltage.
  • Testing the device's performance in powering a light-emitting diode (LED).

Main Results:

  • Capacitance increases proportionally to the negative sixth power of the convex diameter (d).
  • High capacitance values (up to 7 mF/cm²) are achieved due to van der Waals attraction and enhanced electron trapping.
  • The fabricated supercapacitor powered an LED for 37 ms after charging and showed no dielectric breakdown up to 1,100 V.

Conclusions:

  • Amorphous TiO2-x surfaces exhibit unique electrical properties suitable for supercapacitor applications.
  • The developed supercapacitor demonstrates high performance and stability.
  • Integrating oxide ribbons with micro-electro-mechanical systems could lead to further advancements in amorphous titanium dioxide supercapacitors.