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Related Concept Videos

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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Energy Stored in Capacitors01:10

Energy Stored in Capacitors

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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.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
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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.
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.
To calculate the energy stored in a capacitor of...
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Capacitors01:15

Capacitors

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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.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
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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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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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Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
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Renewable-emodin-based wearable supercapacitors.

Pengfei Hu1, Tinghan Chen2, Yun Yang1

  • 1School of Chemistry and Environment, Beihang University, Beijing 100191, P. R. China. wanghua8651@buaa.edu.cn guolin@buaa.edu.cn.

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|January 14, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a safe, flexible all-solid-state wearable supercapacitor using emodin, a renewable biomolecule. This innovation advances energy storage for wearable electronics, powering devices like electronic watches.

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Area of Science:

  • Materials Science
  • Energy Storage
  • Biomaterials

Background:

  • Wearable electronics require safe, non-toxic energy storage solutions.
  • Existing energy-storage devices often lack flexibility and safety for wearable applications.
  • Renewable and biocompatible materials are sought for sustainable electronic components.

Purpose of the Study:

  • To fabricate a novel all-solid-state wearable supercapacitor.
  • To utilize the renewable biomolecule emodin as an electrode material.
  • To demonstrate the potential of emodin-based supercapacitors for powering wearable devices.

Main Methods:

  • Fabrication of an all-solid-state wearable supercapacitor using emodin.
  • Characterization of the supercapacitor's charge storage and rate capabilities.
  • Integration of the supercapacitor into a strap-shaped device for proof-of-concept testing.

Main Results:

  • The emodin-based supercapacitor demonstrated excellent charge storage and rate capability.
  • The device exhibited significant flexibility, suitable for integration into wearable electronics.
  • A strap-shaped supercapacitor successfully powered an electronic watch.

Conclusions:

  • Emodin is a promising, safe, and renewable material for wearable supercapacitor electrodes.
  • The developed all-solid-state supercapacitors offer a viable solution for safe wearable energy storage.
  • This work paves the way for the development of advanced, sustainable wearable electronics.