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Energy Stored in a Capacitor

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.

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Related Experiment Video

Updated: Jun 1, 2026

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

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

Published on: January 7, 2022

CeO2 nanoparticles/graphene nanocomposite-based high performance supercapacitor.

Yi Wang¹, Chun Xian Guo, Jiehua Liu

¹School of Chemical and Biomedical Engineering & Centre for Advanced Bionanosystems, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore.

Dalton Transactions (Cambridge, England : 2003)

|May 20, 2011

Summary

A novel cerium oxide nanoparticles/graphene nanocomposite was developed for enhanced supercapacitor performance. This material demonstrates high specific capacitance and power density due to synergistic effects between cerium oxide and graphene.

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Published on: July 3, 2025

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Last Updated: Jun 1, 2026

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

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

Published on: January 7, 2022

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions

Published on: July 3, 2025

Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Supercapacitors are crucial energy storage devices.
Graphene and cerium oxide nanoparticles (CeO2) are promising materials for supercapacitors.
Developing advanced nanocomposites can improve supercapacitor performance.

Purpose of the Study:

To fabricate and characterize a cerium oxide nanoparticles/graphene nanocomposite.
To investigate the supercapacitor performance of the fabricated nanocomposite.
To understand the synergistic effects contributing to enhanced performance.

Main Methods:

Deposition of cerium oxide (CeO2) nanoparticles onto a three-dimensional graphene material.
Electrochemical characterization of the resulting nanocomposite for supercapacitor applications.

Main Results:

The CeO2 nanoparticles/graphene nanocomposite exhibited high specific capacitance.
The nanocomposite demonstrated a high power density.
A strong synergistic effect was observed, enhancing performance.

Conclusions:

The fabricated CeO2 nanoparticles/graphene nanocomposite shows excellent potential for supercapacitor applications.
Improved conductivity of CeO2 and better graphene utilization contribute to the observed synergistic effects.
This work highlights the promise of nanostructured composites for advanced energy storage.