Energy harvesting by nonlinear capacitance variation for a relaxor ferroelectric poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) terpolymer

Abstract

The present letter describes the investigation of the electrostatic energy harvesting through nonlinear capacitance variation caused by changes in temperature for a poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene) [P(VDF-TrFE-CFE)] terpolymer. Owing to the electric tunability of the terpolymer, the harvested energy can-using an Ericsson cycle-be simulated from permittivity under a dc electric field. When going from 25 to 0 °C, it was found, from simulation, that the harvested energy increased up to 240 mJ/cm3 when raising the electric field at 80 kV/mm. Experimental measurement was also carried out, thus confirming the feasibility of electrostatic energy harvesting through low temperature Ericsson cycle.

Improvement of the recoverable energy storage density and efficiency by utilizing the linear dielectric response in ferroelectric capacitors

“…(6), an equivalent e r for PNZT thin films of about 108 was obtained, which is close to the measured value at high field mentioned above. Both the directly measured and calculated dielectric permittivity are higher than their counterparts for materials having dielectric permittivity lower than 100, e.g., polymer, 22 composite, 23 and linear dielectric material. 4 In summary, we improved the dielectric strength, RES density, and efficiency of PZT4060 thin films by donor doping (Nb 5þ ).…”

Pyroelectric waste heat energy harvesting using the Olsen cycle on Pb(Zr, Ti)O3-Pb(Ni, Nb)O3 ceramics

“…), single crystals (e.g., PMN-PT, 18,35,36 PZN-PT 20,21 ), and polymers (e.g., PVDF-TrFE 3,16,22,[37][38][39][40] ). Each material can be operated in different temperature ranges centered around their Curie temperature.…”

An analysis of lead-free (Bi0.5Na0.5)0.915-(Bi0.5K0.5)0.05Ba0.02Sr0.015TiO3 ceramic for efficient refrigeration and thermal energy harvesting

“…Moreover, the governing conditions of lead-based ferroelectrics indicate that most of these provide a high energy density under the application of large applied electric fields, e.g. P(VDF-TrFE: 4-60 MV/m 23,31,42,47,49,50 ; PLZT (0.2-7.5 MV/m) 43 . This clearly indicates that the lead-free composition understudy is a thermal energy harvesting material of interest based on the maximum energy harvesting and the low applied electric fields within similar temperature ranges.…”