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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

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...
Energy Stored in a Capacitor01:12

Energy Stored in a Capacitor

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.
Energy Stored in Capacitors01:10

Energy Stored in Capacitors

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...
Capacitor With A Dielectric01:18

Capacitor With A Dielectric

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...
Capacitors and Capacitance01:18

Capacitors and Capacitance

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.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

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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Updated: Jun 8, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

Highly flexible and all-solid-state paperlike polymer supercapacitors.

Chuizhou Meng1, Changhong Liu, Luzhuo Chen

  • 1Tsinghua-Foxconn Nanotechnology Research Center and Department of Physics, Tsinghua University, Beijing 100084, People's Republic of China.

Nano Letters
|September 14, 2010
PubMed
Summary
This summary is machine-generated.

Researchers developed ultrathin, flexible supercapacitors using polyaniline electrodes and a gel electrolyte. These paperlike devices offer high capacitance and stability for wearable electronics.

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Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors
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Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

Published on: November 30, 2021

Related Experiment Videos

Last Updated: Jun 8, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
12:00

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

Published on: January 7, 2022

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors
10:57

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

Published on: November 30, 2021

Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Growing demand for thin, lightweight, and flexible energy-storage solutions for wearable electronics.
  • Limitations of current supercapacitors in terms of flexibility and form factor.
  • Need for advanced materials and device architectures to meet these demands.

Purpose of the Study:

  • To demonstrate a novel ultrathin, all-solid-state supercapacitor with a simple fabrication process.
  • To evaluate the performance of polyaniline-based electrodes in a flexible gel electrolyte.
  • To explore the potential of paperlike polymer supercapacitors for future wearable electronics.

Main Methods:

  • Fabrication of an ultrathin all-solid-state supercapacitor using polyaniline-based electrodes.
  • Solidification of electrodes within a sulfuric acid-polyvinyl alcohol gel electrolyte.
  • Testing of device performance, including specific capacitance, cycle stability, and leakage current under flexible conditions.

Main Results:

  • Achieved an ultrathin device comparable in thickness to A4 paper.
  • Demonstrated high specific capacitance of 350 F/g (electrode material) and 31.4 F/g (entire device).
  • Exhibited excellent cycle stability over 1000 cycles and low leakage current (17.2 μA) in a flexible state.

Conclusions:

  • The developed paperlike polymer supercapacitors offer a promising energy-storage solution for wearable electronics.
  • The simple fabrication process and high performance of these flexible devices open new design opportunities.
  • These advancements contribute to the development of next-generation flexible and integrated electronic systems.