The inclusion of electroactive β-phase in Sn~(2+) incorporated PVDF composite film for improving dielectric properties and piezoelectric energy generation

摘要

Low content (0.5 wt. %) of dihydrate tin chloride (Sn~(2+)) salt leads to inclusion of 98 % electroactive phase in poly(vinylidene fluoride) (PVDF), out of this a high yield of piezoelectric β-phase (～49%) is found, which is most desirable for mechanical energy harvesting application. It is also found that Sn~(2+) salt can significantly enhanced the dielectric property of resulting Sn~(2+) incorporated PVDF composite film. Thus, the enhancement of β-phase in the PVDF/Sn~(2+) composite film owns to be a potential material for mechanical energy harvesting application. We have also demonstrated the mechanical energy harvesting capability of the nanogenerator (NG) made with PVDF/Sn~(2+) composite film under repeated human finger touch.