Related Experiment Video
Updated: May 10, 2025
10:40
A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
8.2K
High entropy modulated quantum paraelectric perovskite for capacitive energy storage
Yongbo Fan1, Wanbo Qu2, Haifa Qiu1
1Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China.
Nature Communications
|April 23, 2025
Summary
We developed a novel high entropy material for electric vehicle capacitors, achieving stable, field-independent energy storage. This breakthrough offers high energy density and efficiency for next-generation power systems.
Area of Science:
- Materials Science
- Electrochemistry
- Solid State Physics
Background:
- Electrostatic capacitors are vital for electric vehicle (EV) power systems.
- Current EV capacitors use ferroelectric oxides with field-dependent permittivity, limiting performance.
- A need exists for advanced dielectrics with stable, high energy storage capabilities.
Purpose of the Study:
- To design a high entropy modulated dielectric material for stable, field-independent energy storage.
- To enhance energy density and efficiency in electrostatic capacitors for EVs.
- To explore quantum paraelectric-ferroelectric/antiferroelectric matrices for energy storage applications.
Main Methods:
- High entropy modulation design in a quantum paraelectric-ferroelectric/antiferroelectric matrix.
- Material processing for defect-less microstructure and versatile polar regions.
- Electrochemical analysis and finite-element simulation to determine breakdown strength.
Main Results:
- Achieved a recoverable energy density (Wrec) of 13.3 J/cm³ with 92.4% efficiency (η).
- Demonstrated stable, field-independent energy charge/discharge response across a wide voltage range.
- Engineered a breakdown strength (Eb) of 750 kV/cm in the bulk perovskite material.
Conclusions:
- The high entropy design offers a new pathway for high-performance dielectrics in energy storage.
- Quantum paraelectrics show significant promise for advanced energy storage applications.
- The developed material is suitable for device scale-up, advancing EV power systems.
Related Concept Videos
01:12Energy Stored in a Capacitor
3.5K
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.
3.5K
01:10Energy Stored in Capacitors
386
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.
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
By integrating the equation that relates voltage and current in a capacitor, one can derive an equation for the voltage across the capacitor at any given time. This equation is crucial in understanding and predicting the behavior of capacitors in...
386
01:25MOS Capacitor
625
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...
625
01:31Dielectric Polarization in a Capacitor
4.5K
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...
4.5K
01:26Energy Stored in a Capacitor: Problem Solving
1.0K
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...
1.0K
01:18Capacitor With A Dielectric
3.8K
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.
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
3.8K