| 초록 |
Piezoelectric ceramics that converts mechanical energy into electrical energy has been used in various applications such as energy harvesters, self-powered sensors, and healthcare devices. To date, many piezoelectric materials have been synthesized and exploited to fabricate piezoelectric nanogenerators. Composite-based nanogenerators incorporating piezoelectric nanoparticles into soft polymer matrices offer unique advantages over other approaches because the fabrication process is simple and scalable, using low-cost materials. In this study, all-printed flexible piezoelectric energy harvester of interdigitated structure (IDE) based on PZT and Ag composite paste is developed by using a simple and facile 3D printing process. By optimization of rheological properties of composite paste, we successfully formed the active and electrode layers without interference between them, high temperature annealing and complicated transfer processes. Under periodically mechanical deformations, we optimized the output performance of flexible piezoelectric nanogenerator as a function of poling voltage, strain rate, and strain speed. Our proposed approach is a remarkable improvement in the composite-based nanogenrator research for self-powered flexible energy source to realize the wearable electronics and sensors. |
