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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.
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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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Capacitors play a crucial role in car radios, where they filter and store frequencies to ensure clear signal reception. Essentially serving as energy storage devices, capacitors store energy within their electric field and are composed of two parallel conducting plates separated by a dielectric.
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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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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

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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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Ultrastretchable MXene Microsupercapacitors.

Menglu Wang1, Shuxuan Feng1, Chong Bai1

  • 1College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.

Small (Weinheim an Der Bergstrasse, Germany)
|February 24, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed ultrastretchable microsupercapacitors using crumpled MXene microelectrodes for advanced deformable electronics. These devices offer high capacitance and exceptional durability under extreme stretching, enabling self-powered wearable applications.

Keywords:
MXenemicrosupercapacitorsstretchable electronicsstretchable energy storage deviceswearable electronics

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Area of Science:

  • Materials Science
  • Energy Storage
  • Nanotechnology

Background:

  • Microsupercapacitors are key for miniaturized energy storage in flexible electronics.
  • Two-dimensional (2D) transition metal carbides (MXenes) offer excellent conductivity and processability for electrode materials.

Purpose of the Study:

  • To create an ultrastretchable microsupercapacitor with enhanced deformability using MXene microelectrodes.
  • To investigate the electrochemical performance and mechanical stability of the developed microsupercapacitors under various strain conditions.

Main Methods:

  • Fabrication of interdigitated MXene microelectrodes with crumpled surface textures.
  • Characterization of electrochemical properties (specific capacitance) and mechanical stability (stretchability, cycle life).
  • Integration of microsupercapacitors into a self-powering circuit to drive an LED array.

Main Results:

  • Achieved high specific capacitance (≈185 mF cm⁻²).
  • Demonstrated ultrahigh stretchability up to 800% area strain with ≈89.7% capacitance retention after 1000 cycles.
  • Confirmed stable charging-discharging capability under dynamic stretching and successful powering of an LED array in wearable settings.

Conclusions:

  • The crumpled MXene microsupercapacitors exhibit superior stretchability and stable energy storage for deformable electronics.
  • The developed design strategy offers a pathway for creating robust, high-performance energy storage devices based on 2D nanomaterials.
  • These advancements pave the way for self-powered wearable technologies and advanced electronic systems.