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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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Equivalent Capacitance01:19

Equivalent Capacitance

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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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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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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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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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Biochar for Supercapacitor Application: A Comparative Study.

Shivam Rawat1,2, Thangavel Boobalan3, Bhavya B Krishna1,2

  • 1Material Resource Efficiency Division (MRED), CSIR- Indian Institute of Petroleum (IIP), Dehradun, 248005, Uttarakhand, India.

Chemistry, an Asian Journal
|October 20, 2022
PubMed
Summary

Litchi seed biochar demonstrated superior performance in supercapacitors due to its unique properties. This research highlights biochar

Keywords:
BiocharBiomassCharge storageEnergy storageSupercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Renewable Energy

Background:

  • Biochar, a carbon-rich material derived from biomass pyrolysis, is explored for energy storage applications.
  • Supercapacitors offer high power density and long cycle life, making them suitable for various energy storage needs.

Purpose of the Study:

  • To evaluate biochar derived from Litchi seeds, Jamun seeds, and pine cones as electrode materials for supercapacitors.
  • To investigate the influence of feedstock and preparation temperature on biochar's physicochemical and electrochemical properties.

Main Methods:

  • Pyrolysis of Litchi seeds, Jamun seeds, and pine cones to produce biochar.
  • Characterization of biochar's physical and chemical properties (e.g., surface area, pore volume, heteroatom content).
  • Electrochemical testing of biochar in a symmetric supercapacitor cell configuration.

Main Results:

  • Litchi seed-derived biochar exhibited the highest specific capacitance (190 F/g at 1 A/g).
  • Superior performance of Litchi seed biochar is attributed to N and O heteroatom functionalities, high specific surface area, and pore volume.
  • Physicochemical and electrochemical properties varied significantly based on feedstock and preparation temperature.

Conclusions:

  • Litchi seed biochar is a promising material for high-performance supercapacitors.
  • Tailoring biochar properties through feedstock selection and controlled pyrolysis is crucial for optimizing energy storage devices.
  • This study contributes to the development of sustainable and efficient energy storage solutions using waste biomass.