Related Experiment Video
Updated: Aug 10, 2025
12:00
Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
12.6K
Physicochemical Modeling of Electrochemical Impedance in Solid-State Supercapacitors
Davood Peyrow Hedayati1, Gita Singh2, Michael Kucher1
1Faculty of Engineering, Leipzig University of Applied Sciences, 04277 Leipzig, Germany.
Materials (Basel, Switzerland)
|February 11, 2023
Summary
A physicochemical model accurately simulates solid-state supercapacitor impedance using electrochemical impedance spectroscopy. This approach offers better performance prediction by integrating interfacial properties, though it requires further microscale configuration analysis.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state supercapacitors (SSCs) are crucial for advanced energy storage, utilizing porous carbon electrodes and gel-polymer electrolytes.
- Understanding and simulating SSC impedance is key to enhancing their performance and reliability.
Purpose of the Study:
- To develop and compare mathematical and physicochemical equivalent circuit (EC) models for simulating SSC impedance.
- To evaluate the accuracy and applicability of each model in predicting SSC performance.
Main Methods:
- Electrochemical impedance spectroscopy (EIS) was employed to measure the impedance of SSCs.
- Two EC models were adapted: a conventional mathematical model based on best-fit methods and a physicochemical model incorporating advanced theories.
- Model parameters were fitted and compared with analytically calculated values.
Main Results:
- The physicochemical model demonstrated superior approximation ability with a 3.7% relative error, attributed to its integration of interface impedance.
- This model allows for meaningful correlations between electrical elements and physical properties of the electrode, electrolyte, and interface.
- Discrepancies between fitted and calculated parameters highlight the need for further investigation into SSC microscale configurations.
Conclusions:
- The physicochemical EC model shows significant promise for accurately simulating EIS data in SSCs.
- This model offers the advantage of using physically meaningful parameters derived from material properties.
- Further research is needed to refine the model by addressing uncertainties in the microscale configuration of SSCs.
Keywords:
electrochemical impedance spectroscopy (EIS)equivalent circuit (EC)impedance modelingsolid-state supercapacitor (SSC)More Related Videos
08:59Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
Published on: November 30, 2022
4.6K
08:41Electrochemical Impedance Spectroscopy as a Tool for Electrochemical Rate Constant Estimation
Published on: October 10, 2018
25.0K
Related Concept Videos
01:31Dielectric Polarization in a Capacitor
4.8K
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...
4.8K
01:25MOS Capacitor
894
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...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
894
01:26Energy Stored in a Capacitor: Problem Solving
1.1K
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.
Capacitor-discharge ignition is a type of ignition system commonly found in small engines where the energy released from a capacitor ignites an induction coil that, in turn, fires the spark plug.
To calculate the energy stored in a capacitor of...
Capacitor-discharge ignition is a type of ignition system commonly found in small engines where the energy released from a capacitor ignites an induction coil that, in turn, fires the spark plug.
To calculate the energy stored in a capacitor of...
1.1K
01:19Equivalent Capacitance
371
From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
371
01:27Electrostatic Boundary Conditions in Dielectrics
1.3K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.3K
01:12Energy Stored in a Capacitor
3.7K
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.
3.7K