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Related Concept Videos

Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Theory of Strong Electrolytes01:23

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The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
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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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The Electrical Double Layer01:30

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In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
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MOS Capacitor01:25

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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 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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Related Experiment Video

Updated: Mar 20, 2026

Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
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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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A zwitterionic gel electrolyte for efficient solid-state supercapacitors.

Xu Peng1, Huili Liu1, Qin Yin1

  • 1Hefei National Laboratory for Physical Sciences at the Microscale, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Hefei Science Center (CAS), and CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei, Anhui 230026, China.

Nature Communications
|May 27, 2016
PubMed
Summary
This summary is machine-generated.

A novel zwitterionic gel electrolyte enhances solid-state supercapacitors with superior water retention and ion transport. This breakthrough offers remarkable capacitance and durability for advanced energy storage devices.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Solid-state supercapacitors require gel electrolytes with high ion mobility, mechanical strength, and water retention for durability.
  • Existing gel electrolytes often struggle to balance these properties effectively.

Purpose of the Study:

  • To develop a zwitterionic gel electrolyte that combines robust water retention with efficient ion migration channels.
  • To evaluate the electrochemical performance of a graphene-based solid-state supercapacitor utilizing this novel electrolyte.

Main Methods:

  • Synthesis and characterization of a zwitterionic gel electrolyte.
  • Fabrication of graphene-based solid-state supercapacitors.
  • Electrochemical testing, including capacitance measurements and rate capability analysis at varying current densities.

Main Results:

  • The zwitterionic gel electrolyte demonstrated excellent water retention and facilitated ion transport.
  • Graphene-based solid-state supercapacitors achieved a high volume capacitance of 300.8 F cm⁻³ at 0.8 A cm⁻³.
  • The device exhibited outstanding rate capability with only a 14.9% capacitance loss from 0.8 to 20 A cm⁻³.

Conclusions:

  • Zwitterionic gel electrolytes offer a promising approach for developing high-performance solid-state supercapacitors.
  • The reported electrolyte achieves state-of-the-art performance in graphene-based solid-state supercapacitors.
  • This work highlights the potential of zwitterionic materials in advanced energy storage applications.