Shin, Youn-Hwan Jung, Inki Park, Hyunchul Pyeon, Jung Joon Son, Jeong Gon Koo, Chong Min Kim, Sangtae Kang, Chong-Yun 2024-01-19T21:33:44Z 2024-01-19T21:33:44Z 2021-09-05 2018-10 2072-666X https://pubs.kist.re.kr/handle/201004/120834 The fatigue resistance of piezoelectric PVDF has been under question in recent years. While some report that a significant degradation occurs after 10(6) cycles of repeated voltage input, others report that the reported degradation originates from the degraded metal electrodes instead of the piezoelectric PVDF itself. Here, we report the piezoelectric response and remnant polarization of PVDF during 10(7) cycles of repeated compression and tension, with silver paste-based electrodes to eliminate any electrode effect. After applying repeated tension and compression of 1.8% for 10(7) times, we do not observe any notable decrease in the output voltage generated by PVDF layers. The results from tension experiments show stable remnant polarization of 5.5 C/cm(2), however, the remnant polarization measured after repeated compression exhibits a 7% decrease as opposed to the tensed PVDF. These results suggest a possible anisotropic response to stress direction. The phase analyses by Raman spectroscopy reveals no significant change in the phase content, demonstrating the fatigue resistance of PVDF. English MDPI POLARIZATION FATIGUE FILMS PHASE Mechanical Fatigue Resistance of Piezoelectric PVDF Polymers Article 10.3390/mi9100503 1 MICROMACHINES, v.9, no.10 MICROMACHINES 9 10 scie scopus 000448554800029 2-s2.0-85054597522 Chemistry, Analytical Nanoscience & Nanotechnology Instruments & Instrumentation Physics, Applied Chemistry Science & Technology - Other Topics Instruments & Instrumentation Physics Article POLARIZATION FATIGUE FILMS PHASE ferroelectric PVDF piezoelectric mechanical fatigue resistance remnant polarization