부산대학교 도서관

The application prospects of piezoelectric vibration energy harvesters (PVEH) hinge significantly on two crucial parameters: vibration acceleration and output power. Historically, predominant research efforts have been directed toward the design of innovative structures or the augmentation of piezoelectric film thickness, making it challenging to surpass the existing limits. This paper reports a cutting-edge PVEH distinguished by its remarkable performance capabilities and its exceptional adaptability to ultra-low startup acceleration environments, achieving a remarkable minimum acceleration of 0.02g and the highest normalized power density of 9.305 μWmm -3 g -2 , surpassing conventional counterparts. This exceptional capability bestows upon it significant potential across a diverse spectrum of application domains, thus offering robust support for the advancement of self-sustaining energy systems in the future.