1：Experimental Design and Method Selection:

The study used the (1-x)BiScO3-xPbTiO3 system prepared by traditional solid-state reaction method. Multiple in-situ techniques were employed, including in-situ high-temperature piezoelectric measurement, XRD, dielectric permittivity measurement, P-E loops, and strain measurements.

2：Sample Selection and Data Sources:

Ceramics with compositions x=

3：55, 60, 63, 64, 65, 70 were prepared. Samples were poled and aged before measurements. List of Experimental Equipment and Materials:

Equipment includes SEM (Hitachi S4800), XRD (Bruker D8 advance), LCR analyzer (Agilent E4980A), ferroelectric tester (Premier II, Radiant Technologies Inc), photonic sensor (2100, MTI), in-situ Berlincourt-type d33 meter, shaker, muffle furnace, and ANSYS R

4：0 software. Materials include oxide powders (Pb3O4, TiO2, Sc2O3, Bi2O3), zirconia balls, alcohol, silver paste, silicone oil, alumina crucible, and stainless steel for cantilever. Experimental Procedures and Operational Workflow:

Powders were mixed, calcined, milled, pressed, and sintered. Electrical properties were measured after electrode coating and poling. In-situ measurements were conducted with temperature control and equilibration steps. Cantilever energy harvesters were assembled and tested under vibration.

5：Data Analysis Methods:

Data were analyzed using Smile View Software for grain size, Gaussian-Lorentz fitting for XRD, Rayleigh analysis for piezoelectric contributions, and ANSYS simulation for stress analysis.