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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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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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Capacitors01:15

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Direct Determination of the Interaction between Carbohydrate-Binding Modules and Lignin with Different Phenol Hydroxyl Contents.

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Bio-Based Carbon Materials for High-Performance Supercapacitors.

Penghui Li1,2, Chi Yang2, Caiwen Wu1,2

  • 1Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.

Nanomaterials (Basel, Switzerland)
|September 9, 2022
PubMed
Summary
This summary is machine-generated.

Researchers developed a sustainable method to create porous carbon from lignin and polyaniline. This N and S double-doped carbon material shows excellent performance for supercapacitors, offering high capacitance and stability.

Keywords:
dopingelectrochemical performanceelectrode materiallignosulfonatepolyaniline

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Sustainable Chemistry

Background:

  • Lignin is a sustainable carbon source from plant biomass.
  • Polyaniline (PANI) is used with lignosulfonate (LS) to create porous carbon.
  • N and S doping enhances carbon material properties.

Purpose of the Study:

  • To optimize conditions for producing N and S double-doped porous carbon from LS/PANI.
  • To evaluate the electrochemical performance of the synthesized material for energy storage.

Main Methods:

  • Investigated varying amounts of lignosulfonate and carbonization temperatures.
  • Synthesized N and S double-doped porous carbon using LS and PANI.
  • Characterized material properties and electrochemical performance.

Main Results:

  • Optimal conditions: 4 g lignosulfonate and 700 °C carbonization temperature.
  • Achieved high specific capacitance: 333.50 F/g (3-electrode) and 242.20 F/g (2-electrode) at 0.5 A/g.
  • Demonstrated excellent cycling stability with 95.14% (3-electrode) and 97.04% (2-electrode) capacitance retention after 5000 cycles.

Conclusions:

  • Efficient double-doping method for layered porous carbon preparation.
  • Material exhibits high energy and power densities suitable for supercapacitors.
  • Provides a practical route for sustainable electrochemical energy storage materials.