Models for 31-Mode PVDF Energy Harvester for Wearable Applications

Table 1

Properties of the PVDF materials.

Material property	Symbol	Value
Relative permittivity	𝜀𝑟	9.5 ± 1
Resistivity	𝜌𝑟	10^11 Ω·m
Mass density	𝜌	1.78 g/cm^3
Piezoelectric constant	𝑑31	17 × 10^−12 C/N
Elastic modulus	𝑌	2500 MPa
Planar Poisson’s ratio	𝜐	0.3
Yield strength	𝜎𝑠	45~55 MPa