This Collection brings together articles discussing different dielectrics, including polymers, nanocomposites, bulk ceramics, and thin films, for energy storage applications.
Ensuring reliable and safe operation of high-power electronic devices necessitates the development of high-quality dielectric nano-capacitors with high recoverable energy density (URec) and efficiency (η) at low applied electric fields (E)/voltages.
One may increase the energy density of dielectric materials via enhancing the dielectric constant and/or breakdown strength of the dielectric materials. Polymers have the advantages of lightweight, ease of processing, large scalability and high breakdown, but suffer from low dielectric constant.
In the following, we will discuss both extrinsic and intrinsic polymer dielectrics, and suggest viable intrinsic dielectric polymers for high energy and low loss dielectric capacitor applications.
Here we report a molecular topology design for dielectric polymers with mechanical bonds that overcomes this obstacle, where cyclic polyethers are threaded onto the axles of various polyimides.
This Collection brings together articles discussing different dielectrics, including polymers, nanocomposites, bulk ceramics, and thin films, for energy storage applications.
This work offers a new strategy for the fabrication of all organic polymer dielectrics for realizing high discharged energy density and high discharging efficiency simultaneously.
We propose a microstructural strategy with dendritic nanopolar (DNP) regions self-assembled into an insulator, which simultaneously enhances breakdown strength and high-field polarizability and minimizes energy loss and thus markedly improves energy storage performance and stability.
1 Introduction Electrostatic capacitors are broadly used in inverters and pulse power system due to its high insulation, fast response, low density, and great reliability. [1 - 6] Polymer materials, the main components of electrostatic capacitors, have the advantages of excellent flexibility, high voltage resistance and low dielectric loss, but the insulation and energy storage characteristics
The research status of different energy storage dielectrics is summarized, the methods to improve the energy storage density of dielectric materials are analyzed and the development trend is prospected.
1 Introduction Electrostatic capacitors are broadly used in inverters and pulse power system due to its high insulation, fast response, low density, and great reliability. [1 - 6] Polymer materials, the main components of electrostatic
In this paper, we first introduce the research background of dielectric energy storage capacitors and the evaluation parameters of energy storage performance. Then, the research status of ceramics, thin films, organic polymers, and organic–inorganic nanocomposites for energy storage is
We propose a microstructural strategy with dendritic nanopolar (DNP) regions self-assembled into an insulator, which simultaneously enhances breakdown strength and high-field polarizability and minimizes energy loss and
Conclusions and outlook In summary, high energy density and low loss polymer dielectrics are highly desired for electric energy storage applications in the power frequency range (100 to 10 6 Hz). Rich condensed matter physics is involved in the development of next generation dielectric polymeric materials.
Selecting a polymer with a higher glass transition temperature (Tg) as the matrix is one of the effective ways to increase the upper limit of the polymer operating temperature. However, current high- Tg polymers have limitations, and it is difficult to meet the demand for high-temperature energy storage dielectrics with only one polymer.
Nature Materials 24, 1074–1081 (2025) Cite this article High-temperature capacitive energy storage demands that dielectric materials maintain low electrical conduction loss and high discharged energy density under thermal extremes.
An ideal energy storage dielectric should fit the requirements of high dielectric constant, large electric polarization, low-dielectric loss, low conductivity, large breakdown strength, and high fatigue cycles, and thermal stability, etc. However, it is very challenging for a single dielectric to meet these demanding requirements.
The energy storage dielectrics include ceramics, thin films, polymers, organic–inorganic composites, etc. Ceramic capacitors have the advantages of high dielectric constant, wide operating temperature, good mechanical stability, etc., such as barium titanate BaTiO 3 (BT) , strontium titanate SrTiO 3 (ST) , etc.
High-temperature capacitive energy storage demands that dielectric materials maintain low electrical conduction loss and high discharged energy density under thermal extremes. The temperature capability of dielectric polymers is limited to below 200 °C, lagging behind requirements for high-power and harsh-condition electronics.
