Comparative study on the floating electrode effects of multi-layered ceramic/polymer composite films for piezoelectric energy harvester

The ceramic/polymer composite films have been attracting much attention to use flexible energy harvester owing to their high dielectric property and flexibility. However, these films are still not enough to use power source of... [ view full abstract ]

The ceramic/polymer composite films have been attracting much attention to use flexible energy harvester owing to their high dielectric property and flexibility. However, these films are still not enough to use power source of energy harvester due to their low electrical properties. By adding floating electrode into the ceramic/polymer composite films, we believe to solve these problems of low output voltage and energy. In this paper, after the fabrication of multi-layered 0.675Pb(Mg_1/3Nb_2/3)O₃–0.325PbTiO₃ (PMN-PT)/polymer composite films, the effects of floating electrode (reduced graphene oxide (rGO), Cu, Ag and etc.) on the properties of multi-layered PMN-PT/polymer composites are examined by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD) measurements. Then, output voltage and energy are compared and analyzed in the presence and absence of floating electrodes on composite films.