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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
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An approach to classification and capacitance expressions in electrochemical capacitors technology
Silvia Roldán1, Daniel Barreda, Marcos Granda
1Instituto Nacional del Carbón, INCAR-CSIC, Apdo. 73, 33080-Oviedo, Spain. riqui@incar.csic.es.
Physical Chemistry Chemical Physics : PCCP
|November 22, 2014
Summary
This study proposes a systematic classification for supercapacitors based on charge storage and electrode materials. It clarifies terminology and explains capacitance calculations for better understanding of these electrochemical energy storage devices.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- The increasing variety of electrochemical capacitors necessitates a standardized classification system.
- Current terminology for supercapacitors (symmetric, asymmetric, hybrid) lacks consistent definition.
- Understanding supercapacitor behavior requires a systematic approach to device characterization.
Purpose of the Study:
- To propose a rational classification system for supercapacitors.
- To clarify and standardize terminology related to supercapacitor types.
- To rationalize the selection of mathematical expressions for capacitance calculation.
Main Methods:
- Classification based on charge storage mechanism and electrode active material.
- Clarification of internationally accepted terminology (symmetric, asymmetric, hybrid).
- Analysis of electrode potential evolution during galvanostatic cycling.
Main Results:
- A systematic classification framework for supercapacitors is presented.
- Standardized definitions for symmetric, asymmetric, and hybrid supercapacitors are provided.
- Guidance on selecting appropriate capacitance calculation methods based on device characteristics is offered.
Conclusions:
- The proposed classification facilitates a better understanding of supercapacitor behavior.
- Standardized terminology and calculation methods aid in systematic device analysis.
- Electrode potential evolution is a key indicator for fundamental supercapacitor performance understanding.
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