清華大學材料科學與工程研究院《材料科學論壇》學術報告

報告時間：2024年7月3日上午10:30

報告人：Qiming Zhang, Professor of PSU, USA

報告地點：清華大學逸夫技術科學樓A205學術報告廳

邀請人：南策文院士

報告題目：Polymer Ferroelectrics for Energy Conversion

報告簡介：

Polymeric ferroelectrics are distinguished by their high pliability, easy fabrication into complicated shapes, mechanical robustness, and polar active nature. Ferroelectricity in polymers was discovered around the 1970s in poly (vinylidene fluoride), which has served as a platform for efficient cross-coupling between electrical, mechanical, and thermal energies. Such ferroelectric soft materials and their polar active derivatives undergo a change in electrical polarization in response to general forces (mechanical stresses or temperature changes) and vice versa, enabling a series of physical effects, including piezoelectric and electrostriction, electrocaloric and pyroelectric, and a variety of dielectric and ferroelectric effects. These multifunctional polymeric materials are suitable for many different applications in portable, miniaturized, and wearable electroactive devices applied at human–machine interfaces because of their easy processability into thin, light, tough, and pliable films and fibers.

報告人簡介：

Zhang Qiming, Distinguished Professor at Pennsylvania State University, Fellow of the American Physical Society (APS Fellow), Fellow of the American Materials Society (MRS Fellow), and Fellow of the American Institute of Electrical and Electronics Engineers (IEEE Fellow). Graduated from Nanjing University with a bachelor's degree in 1981; Graduated with a PhD from Pennsylvania State University in 1986; 1988-1991 Assistant Scientist at Brookhaven National Laboratory; 1991-2001 Assistant Researcher, Assistant Professor, Associate Professor, and Professor at Pennsylvania State University; 2006- present, Distinguished Professor of Electrical Engineering and Materials at Pennsylvania State University. Research areas include polymers and nanocomposites for energy storage and high-voltage applications, thermoelectric effects and solid-state cooling equipment, sensors, energy harvesting, polymer thin film devices and microelectromechanical systems, as well as electro-optic and photonic devices.