Utilizing Linear Polymers to Optimize Remanent Polarization and Construct Multilayer Interfaces to Obtain...

Area of Science:

• Materials Science
• Polymer Science
• Electrical Engineering

Background:

• Polyvinylidene fluoride (PVDF) is a ferroelectric polymer used in energy dielectric applications.
• High-polarization PVDF suffers from low efficiency due to high residual polarization.
• Developing efficient and stable dielectric materials is crucial for advanced energy storage.

Purpose of the Study:

• To enhance the charge-discharge efficiency of PVDF-based dielectrics.
• To investigate the effect of incorporating linear polycarbonate (PC) into PVDF.
• To optimize multilayer structures for improved dielectric performance.

Main Methods:

• Fabrication of multilayer PC-PVDF-PC (CPC) films with varying PC content.
• Characterization of polarization, remanent polarization (Dr), and breakdown strength.
• Evaluation of charge-discharge efficiency and energy density under high electric fields.

Main Results:

• Incorporating PC into PVDF optimizes remanent polarization, maintaining it within a small range.
• Multilayer CPC films with a high proportion of PC exhibit excellent charge-discharge efficiency.
• Achieved an energy density of 11.48 J/cm³ and 92.4% efficiency at 610 kV/mm.

Conclusions:

• The PC-PVDF-PC multilayer structure effectively enhances dielectric properties for energy storage.
• The developed flexible organic films are suitable for flexible energy storage devices.
• This approach offers a pathway to high-performance, efficient ferroelectric polymer dielectrics.