Related Experiment Video
Updated: Sep 10, 2025

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
Collaborative design of polarization and antiferrodistortion configurations in high energy capacitive relaxor
Kun Wei1, Jianhong Duan1, He Qi2
1College of Electrical and Information Engineering, Hunan University, Changsha, Hunan, China.
Abstract:
Lead-free relaxor ferroelectrics have been regarded as superior candidates for dielectric energy storage applications. Nonetheless, the degradation of energy storage performance resulted from the trade-off between high polarization and low hysteresis in RFEs under superhigh electric fields has become a bottleneck. Here, a chemical framework is established based on NaNbO3-based RFEs, bridging atomic-scale structural control to realize excellent energy storage performance. The framework design leads to unique local lattice distortion with both inhomogeneous polarization and antiferrodistortion configurations, including locally disordered polarization distribution, continuous polarization deflection and the co-existence of ordered and disordered oxygen octahedral tilts, as confirmed by phase-field simulation and scanning transmission electron microscopy. As a result, negligible polarization switching hysteresis as well as the large and delayed saturated polarization simultaneously contribute to the excellent energy storage performance. For instance, two NaNbO3-based RFEs with different compositions show ultrahigh recoverable energy densities of 16.48 and 20.08 J cm-3, respectively, as well as near-zero energy loss (η ~ 90.38% and 95.09%). This work presents new avenues toward designing high-performance lead-free RFEs.
Related Concept Videos
Dielectric Polarization in a Capacitor
Spherical and Cylindrical Capacitor
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
Capacitor With A Dielectric
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Design Example: Capacitance Multiplier Circuit
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
Potential Due to a Polarized Object
Induced Electric Dipoles
Since the absolute value of potential energy holds no physical meaning, its zero value can be chosen as per...

