In this paper, the + 0.005KNhO: ÷ xwt9`o le02 lead-free piezoelectric ceramics for energy harvesting devices were fabricated by the conventiona] mixed oxide method. The microstructure, dielectric, and piezoelectric properties were investigated as a function of the Te09 addition. All the specimens showed an orthorhombic phase structure. At the composition ceramics doped with 0.1 wt%Te02, the optimum values of da 212 pC/N, d33`g33= 9.54 pm2/N, and kp= 0.448 were obtained, respectively. The results indicate that the composition ceramics is a promising candidate for energy harvesting devices applications.