Enhanced energy storage in high-entropy ferroelectric polymers

Area of Science:

• Materials Science
• Condensed Matter Physics
• Polymer Science

Background:

• Relaxor ferroelectrics are crucial for energy storage but face limitations in energy density due to early polarization saturation.
• Existing ferroelectric polymers and nanocomposites exhibit reduced polarization, hindering their application in high-performance electronics.

Purpose of the Study:

• To overcome the limitations of current relaxor ferroelectrics for energy storage.
• To enhance the energy density and polarizability of ferroelectric polymers.

Main Methods:

• Inducing a high-entropy superparaelectric phase in relaxor ferroelectric polymers using low-dose proton irradiation.
• Combining theoretical calculations and experimental investigations to understand the underlying mechanisms.

Main Results:

• Proton irradiation resulted in delayed polarization saturation, reduced ferroelectric loss, and improved polarizability.
• The formation of new chemical bonds via irradiation-induced reactions was identified as key to the high-entropy state.
• The modified polymers achieved an enhanced intrinsic energy density of 45.7 J cm⁻³ at room temperature.

Conclusions:

• The study introduces a novel high-entropy superparaelectric phase in ferroelectric polymers via proton irradiation.
• This approach significantly enhances energy storage capabilities, outperforming existing materials.
• The findings pave the way for developing next-generation high-performance ferroelectric polymers.