Piezoelectric Materials and Energy Harvesting Technologies

Piezoelectric materials convert mechanical stress into electrical charge and vice versa, enabling direct energy transduction without intermediate moving parts. Traditional piezoceramics such as lead zirconate titanate (PZT) offer high electromechanical coupling but are brittle and contain toxic lead. Recent advances in piezopolymers—most notably poly(vinylidene fluoride) (PVDF) and its copolymers—and in nanocomposites have opened pathways to flexible, lightweight harvesters. Engineering of crystalline phases, interfaces and nanostructures permits optimisation of piezoelectric constants, mechanical resilience and device form factors. Hybrid approaches integrate piezoelectric, triboelectric and ferroelectric phenomena to broaden ambient energy capture from vibrations, sound, human motion and fluid flow. Applications span self-powered sensors for the Internet of Things, structural health monitoring, biomedical stimulators and environmental devices. Scalable fabrication techniques—electrospinning, hot-pressing, template-assisted growth—are key to translating laboratory prototypes into robust, wearable and embedded harvesters with global sustainability impact.

Research from Nature Portfolio

Recent studies have demonstrated that electrospun piezoelectric nanofibre webs can serve as highly sensitive acoustic sensors. By optimising fibre orientation and β-phase content in poly(vinylidene fluoride), devices detect low-frequency sound with sensitivity exceeding that of commercial films, enabling precise noise monitoring and environmental sensing in compact, flexible formats.

Other work has focused on wearable piezoelectric nanogenerators derived from electrospun PVDF-HFP blended with cobalt-doped ZnO nanoparticles. Increased β-phase crystallinity and dielectric permittivity yield output voltages in the volt range under mechanical deformation. The resulting flexible generators demonstrate robust energy conversion for self-powered wearable electronics and biomedical stimulators.

Piezoelectric Materials and Energy Harvesting Technologies publication trend

The graph below shows the total number of articles in piezoelectric materials and energy harvesting technologies across all publications each year (not limited to Nature Index journals).

Technical terms

Piezoelectricity: Generation of electrical charge in response to applied mechanical stress.

Ferroelectricity: Presence of a spontaneous electric polarization reversible by an external electric field.

β-phase (PVDF): Crystalline polymorph with aligned dipoles that maximises piezoelectric response in poly(vinylidene fluoride).

Electrospinning: Technique to produce fine polymer fibres by applying a high-voltage electric field to a polymer solution.

Nanogenerator: Device that harvests energy at the nanoscale, typically using piezoelectric, triboelectric or pyroelectric effects.

Triboelectric effect: Generation of electrical charge through frictional contact between dissimilar materials.

References

1. Smart and Multifunctional Materials Based on Electroactive Poly(vinylidene fluoride): Recent Advances and Opportunities in Sensors, Actuators, Energy, Environmental, and Biomedical Applications. Chemical Reviews (2023).
2. Recent progress in electrospun polyvinylidene fluoride (PVDF)-based nanofibers for sustainable energy and environmental applications. Progress in Materials Science (2025).
3. Convenient folding‐hot‐pressing fabrication and enhanced piezoelectric properties of high β‐phase‐content poly(vinylidene fluoride) films. Interdisciplinary Materials (2024).
4. Properties and Applications of the β Phase Poly(vinylidene fluoride). Polymers (2018).
5. Multiscale-structuring of polyvinylidene fluoride for energy harvesting: the impact of molecular-, micro- and macro-structure. Journal of Materials Chemistry A (2017).
6. High-sensitivity acoustic sensors from nanofibre webs. Nature Communications (2016).
7. Stretchable Electrospun PVDF-HFP/Co-ZnO Nanofibers as Piezoelectric Nanogenerators. Scientific Reports (2018).
8. Piezoelectric Materials for Energy Harvesting and Sensing Applications: Roadmap for Future Smart Materials. Advanced Science (2021).