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Related Concept Videos

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 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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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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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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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.
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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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Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
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A Transient Pseudo-Capacitor Using a Bioderived Ionic Liquid with Na Ions.

Shunsuke Yamada1

  • 1Department of Robotics, Division of Mechanical Engineering, Tohoku University, 6-6-01 Aoba, Aramakiaza, Aobaku, Sendaishi, Miyagi, 980-8579, Japan.

Small (Weinheim an Der Bergstrasse, Germany)
|January 18, 2023
PubMed
Summary

A novel transient pseudo-capacitor utilizes sodium ions for enhanced performance in bioresorbable electronics. This biodegradable device offers a sustainable power source for implantable and wearable applications.

Keywords:
electrolytesionic gelpseudo-capacitorstransient electronics

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Biomedical Engineering

Background:

  • Transient electronics offer sustainable solutions for disposable devices, reducing electronic waste.
  • Bioresorbable power sources are crucial for implantable medical devices, eliminating the need for removal surgery.
  • Ionic liquid electrolytes provide high ionic conductivity and stability for electrochemical applications.

Purpose of the Study:

  • To develop a transient pseudo-capacitor using a bio-derived ionic liquid and molybdenum trioxide (MoO3) for implantable and disposable electronics.
  • To investigate the effect of sodium ion doping on the electrochemical performance and transient behavior of the pseudo-capacitor.
  • To evaluate the long-term stability and biodegradability of the developed device.

Main Methods:

  • Fabrication of a pseudo-capacitor using Na ion-doped bioderived ionic liquid, MoO3-coated molybdenum foil electrode, and silk separator.
  • Electrochemical characterization including cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy.
  • Assessment of transient behavior through immersion in phosphate-buffered saline (PBS) solution and cycle testing.

Main Results:

  • Na ion doping significantly enhanced areal capacitance by three times compared to undoped devices.
  • The pseudo-capacitor demonstrated a high capacitance retention of 82.8% after 10,000 cycles.
  • Complete dissolution in PBS within 101 days confirmed the transient and bioresorbable nature of the device.

Conclusions:

  • The developed transient pseudo-capacitor exhibits excellent electrochemical performance and stability, suitable for bioresorbable electronics.
  • The use of Na ion-doped ionic liquid and MoO3 offers a promising pathway for advanced transient energy storage.
  • Potential applications include smart agriculture, implantable sensors, and wearable devices, enabling eco-friendly electronics.