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Related Concept Videos

Capacitors01:15

Capacitors

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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.
When a voltage source is connected to a capacitor, positive and negative charges accumulate on the opposite plates. This accumulation generates a potential difference that equals the product of the...
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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

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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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Series and Parallel Capacitors01:14

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Capacitors, fundamental components in electronic circuits, can be connected in series and/or parallel configurations. Each configuration has different impacts on the overall behavior of the circuit.
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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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RC Circuits: Charging A Capacitor01:30

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A circuit containing resistance and capacitance is called an RC circuit. A capacitor is an electrical component that stores electric charge by storing energy in an electric field. Consider a simple RC circuit having a DC (direct current) voltage source ε, a resistor R, a capacitor C, and a two-way position switch. In the circuit, the capacitor can be charged or discharged depending on the position of the switch.
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Updated: Nov 18, 2025

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
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Catechol-Coordinated Framework Film-based Micro-Supercapacitors with AC Line Filtering Performance.

Tianliang Yu1,2, Youfu Wang2, Kaiyue Jiang2,3

  • 1meso-Entropy Matter Lab, Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou, 213164, China.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 10, 2021
PubMed
Summary
This summary is machine-generated.

Researchers developed thin-film coordination polymer frameworks (CPFs) for micro-supercapacitors (MSCs). These novel MSCs demonstrate high energy density and alternating current (AC) line filtering capabilities.

Keywords:
alternating current line filteringcatecholcoordination polymer frameworkcoppermicro-supercapacitor

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Coordination polymer frameworks (CPFs) offer stable structures and porosity for various applications.
  • Preparing thin-film CPFs for energy devices is challenging due to substrate incompatibility and stringent fabrication conditions.

Purpose of the Study:

  • To develop a novel method for preparing thin-film CPFs.
  • To fabricate and characterize film-based micro-supercapacitors (MSCs) using the developed CPFs.
  • To evaluate the electrochemical performance and AC line filtering capabilities of the fabricated MSCs.

Main Methods:

  • A CPF film was synthesized via coordination of an anisotropic ligand and Cu(II) at a liquid-liquid interface.
  • Film-based MSCs were fabricated using high-energy scribing and electrolyte soaking.
  • Electrochemical performance, including volumetric specific capacitance and energy density, was measured.
  • Alternating current (AC) line filtering performance and resistance-capacitance (RC) constant were evaluated.

Main Results:

  • The fabricated MSCs achieved a high volumetric specific capacitance of 121.45 F/cm³.
  • The volumetric energy density reached 52.6 mWh/cm³, surpassing most reported CPF-based MSCs.
  • The device demonstrated notable AC line filtering performance (-84.2° at 120 Hz) and a low RC constant of 0.08 ms.

Conclusions:

  • A new method for preparing thin-film CPFs at a liquid-liquid interface was established.
  • The developed CPF-based MSCs exhibit excellent electrochemical performance and AC line filtering capabilities.
  • This work opens avenues for advanced thin-film CPF applications in energy storage and electronic devices.