Die Rolle ferroelektrischer Film-Energiespeicherkondensatoren

ferroelektrischer Zustand, in ferroelektrischen Kristallen das Vorhandensein eines elektrischen Dipolmoments auch bei Abwesenheit eines äußeren Feldes. Ursache ist, daß der Schwerpunkt der positiven Ladungen des Kristalls nicht mit dem der negativen Ladungen zusammenfällt. Oberhalb der

How can flexible ferroelectric thin films improve energy storage properties?

Moreover, the energy storage properties of flexible ferroelectric thin films can be further fine-tuned by adjusting bending angles and defect dipole concentrations, offering a versatile platform for control and performance optimization.

What is a freestanding ferroelectric film?

Freestanding ferroelectric films, such as BaTiO 3 (BTO) and BiFeO 3 (BFO), obtained through methods like wet etching or laser lift-off, can be folded nearly 180° without damage and exhibit remarkable piezoelectric, flexoelectric, and flexo-photovoltaic effects.

What is the recoverable energy storage density of PZT ferroelectric films?

Through the integration of mechanical bending design and defect dipole engineering, the recoverable energy storage density of freestanding PbZr 0.52 Ti 0.48 O 3 (PZT) ferroelectric films has been significantly enhanced to 349.6 J cm −3 compared to 99.7 J cm −3 in the strain (defect) -free state, achieving an increase of ≈251%.

Does mechanical bending improve the energy storage density of ferroelectric thin films?

Therefore, the structural design involving the mechanical bending of bilayer films, as depicted in Figure 1a, proves highly effective in significantly augmenting both the energy storage density and efficiency of the thin film system for the majority of ferroelectric thin films.

Which ferroelectric materials improve the energy storage density?

Taking PZT, which exhibits the most significant improvement among the four ferroelectric materials, as an example, the recoverable energy storage density has a remarkable enhancement with the gradual increase in defect dipole density and the strengthening of in-plane bending strain.

Can ferroelectrics be used for energy storage?

A brief overview on ferroelectrics for energy storage applications has been given in the previous sections. Great progresses have been made in ferroelectric polymer capacitors, ferroelectric oxide capacitors, and antiferroelectric thin film capacitors.