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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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Energy Stored in Capacitors01:10

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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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Energy Stored in a Capacitor01:12

Energy Stored in a 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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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.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
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Capacitors and Capacitance01:18

Capacitors and Capacitance

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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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Energy Stored in a Capacitor: Problem Solving01:26

Energy Stored in a Capacitor: Problem Solving

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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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Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors
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Flexible and stackable laser-induced graphene supercapacitors.

Zhiwei Peng1, Jian Lin, Ruquan Ye

  • 1Department of Chemistry, ‡Smalley Institute for Nanoscale Science and Technology, and §Department of Materials Science and NanoEngineering, Rice University , 6100 Main Street, Houston, Texas 77005, United States.

ACS Applied Materials & Interfaces
|January 14, 2015
PubMed
Summary
This summary is machine-generated.

Researchers transformed polyimide films into porous graphene using laser induction for flexible supercapacitors. These solid-state devices offer enhanced performance and durability, paving the way for advanced energy storage solutions.

Keywords:
flexiblegraphenelaserscalablesolid-statestackingsupercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Flexible electronics require advanced energy storage solutions.
  • Developing efficient and durable supercapacitors is crucial for portable devices.
  • Graphene-based materials offer promising properties for supercapacitor applications.

Purpose of the Study:

  • To demonstrate a simple method for transforming polyimide films into porous graphene.
  • To fabricate flexible, solid-state supercapacitors using laser-induced graphene.
  • To evaluate the electrochemical performance and cyclability of the fabricated supercapacitors.

Main Methods:

  • Utilizing laser induction to convert commercial polyimide films into porous graphene.
  • Fabricating two types of solid-state supercapacitors: vertically stacked and in-plane microsupercapacitors.
  • Employing solid-state polymeric electrolytes for device construction.

Main Results:

  • Achieved enhanced electrochemical performance, cyclability, and flexibility in the fabricated supercapacitors.
  • Demonstrated areal capacitance exceeding 9 mF/cm2 with a solid-state polymeric electrolyte.
  • Vertically stacked supercapacitors fabricated via laser induction on both sides showed multiplied electrochemical performance.
  • Preserved device flexibility in both supercapacitor configurations.

Conclusions:

  • Simple laser induction is an effective method for producing porous graphene from polyimide.
  • Flexible, solid-state supercapacitors with enhanced performance can be fabricated using this technique.
  • The developed supercapacitors show significant potential for next-generation flexible electronic devices.