With the rapid development of the Internet of Things, there exists an urgent necessity for high performance piezoelectric energy harvesters to facilitate the construction of more efficient wireless sensor systems. However, the development of piezoelectric energy harvesters with high power density remains a major challenge. In this study, we present a synergistic design strategy aimed at improving the output performance of piezoelectric energy harvesters. Micro-pores with low permittivity were introduced into the ceramics to improve the piezoelectric key parameters, including the piezoelectric voltage coefficient (