Pvdfctfe energieopslag

What is controllable positive-charged modification of PVDF-CTFE membrane?

This experiment has realized the purpose of controllable positive-charged modification of the PVDF-CTFE membrane, which provides a simple method for surface positive-charged modification of chlorine-containing fluorine materials and is expected to further expand the application field of PVDF-CTFE membrane.

Why does PVDF-TrFE have a high energy density?

The high energy density obtained from PVDF-TrFE is normally accompanied with a high loss factor and leakage current due to its ferroelectric nature, resulting in poor charge–discharge efficiency when used in energy storage systems.

Is PVDF-TrFE a good piezoelectric material?

In terms of longitudinal piezoelectric coefficient (d33), PVDF-TrFE is one of the best organic piezoelectrics with a value of approximately 30–40 pC N⁻¹. However, compared to commercial piezoceramics like PZT (200–600 pC N⁻¹) and BaTiO₃ (200 pC N⁻¹), it is still inferior.

How does PVDF-go affect the output voltage?

PVDF-GO 1.5 wt.% shows a notably higher enhancing effect where the electroactive β-phase and γ-phase are recorded to be boosted to ~ 68.13%, as well as piezoelectric coefficient (d 33 ~ 55.57 pC/N). Furthermore, increasing impact force encouraged the output voltage.

What are the electrical properties of PVDF-TrFE?

The electrical properties of PVDF-TrFE are structure dependent and can be tailored by modifying the degree of crystallinity, ratio of crystalline phases, crystallite size, and morphology. These objectives are typically pursued by either processing or composite strategies.

Which FTIR peaks indicate the -phase in PVDF?

In our calculations, peaks at 763 cm -1 are indicative of the α-phase while the 840 cm -1 FTIR peak is commonly associated with the electroactive β-phase and γ-phase in PVDF, as reported in recent studies 53. While the γ-phase is also electroactive, it typically exists in smaller fractions compared to the β-phase 54.