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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.
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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Capacitor With A Dielectric01:18

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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 superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
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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.
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.
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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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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.
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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
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All Metal Nitrides Solid-State Asymmetric Supercapacitors.

Changrong Zhu1,2, Peihua Yang3, Dongliang Chao1

  • 1School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore, Singapore.

Advanced Materials (Deerfield Beach, Fla.)
|July 9, 2015
PubMed
Summary
This summary is machine-generated.

Flexible solid-state supercapacitors utilize novel metal nitrides, titanium nitride (TiN) and iron nitride (Fe2N) nanoparticles, as electrode materials. These devices demonstrate excellent performance and durability for energy storage applications.

Keywords:
flexible energy storagegraphene nanosheetsmetal nitridessolid-state supercapacitorsvertical graphene

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing advanced electrode materials is crucial for high-performance energy storage devices.
  • Graphene-based architectures offer unique properties for electrochemical applications.
  • Metal nitrides are promising candidates for supercapacitor electrodes due to their conductivity and stability.

Purpose of the Study:

  • To synthesize and integrate titanium nitride (TiN) porous layers and iron nitride (Fe2N) nanoparticles onto graphene nanosheets.
  • To fabricate flexible solid-state supercapacitors using these novel electrode materials.
  • To evaluate the electrochemical performance, flexibility, and long-term stability of the fabricated supercapacitors.

Main Methods:

  • Atomic layer deposition (ALD) for uniform growth of TiN and Fe2N on vertically aligned graphene nanosheets.
  • Fabrication of flexible solid-state supercapacitor full cells.
  • Electrochemical testing including cyclic voltammetry, galvanostatic charge-discharge, and cycling stability measurements.

Main Results:

  • Uniform deposition of TiN porous layers and Fe2N nanoparticles on graphene nanosheets was achieved.
  • The fabricated solid-state supercapacitors exhibited good flexibility and high-rate capability.
  • The devices demonstrated remarkable capacitance retention of 98% after 20,000 cycles, indicating excellent durability.

Conclusions:

  • Vertically aligned graphene nanosheets decorated with TiN and Fe2N are effective electrode materials for flexible solid-state supercapacitors.
  • The ALD method provides precise control over material growth for enhanced device performance.
  • These findings highlight a promising pathway for developing durable and high-performance flexible energy storage solutions.