Giant Energy Harvesting by Pyroelectric Effect in Relaxor Ferroelectric Terpolymer Poly(vinylidene fluoride-trifluoroethylene-chlorofluoroethylene)
Author(s): ZHU Hong-ying, WANG Xiang-hu, WANG Zhi-jie, WANG Jun, GUO Qun-chao
Pages: 538-542
Year: 2016 Issue: 5
Journal: Chinese Journal of Luminescence
Keyword: energy harvesting; pyroelectricity; terpolymer; P(VDF-TrFE-CFE); temperature fluctuation;
Abstract: Energy harvesting was investigated in relaxor ferroelectric terpolymer P( VDF-TrFE-CFE) by pyroelectric effect. Original energy was the temperature fluctuations. Due to the non-linear die-lectric property in the vicinity of polarization mechanism transition of nanopolar regions, we can har-vest energy by operating Ericsson cycle. Experimental results show that the best energy harvesting temperature range is from 20 to -20 ℃. Ericssion cycle was simulated using the unipolar cycle at different temperatures. Two modes of energy harvesting were presented and analyzed:modeⅠmaxi-mizing and modeⅡminimizing harvested energy, modeⅠis idealized, by applying a low voltage, the harvested energy can reach nearly maximum. The explanation of the two modes was given from the view of microstructure. Temperature and electric field dependence was also given, at 100 kV· mm-1 , temperature from 20 to -20 ℃, giant energy can be harvested around 3 483 mJ · cm-3 . Compared with the single crystals, the advantages, such as the harvested energy increased by 10 times, working temperature decreased to room temperature, and the material flexibility, make it pos-sible as a good candidate for energy harvesting.
Pages: 538-542
Year: 2016 Issue: 5
Journal: Chinese Journal of Luminescence
Keyword: energy harvesting; pyroelectricity; terpolymer; P(VDF-TrFE-CFE); temperature fluctuation;
Abstract: Energy harvesting was investigated in relaxor ferroelectric terpolymer P( VDF-TrFE-CFE) by pyroelectric effect. Original energy was the temperature fluctuations. Due to the non-linear die-lectric property in the vicinity of polarization mechanism transition of nanopolar regions, we can har-vest energy by operating Ericsson cycle. Experimental results show that the best energy harvesting temperature range is from 20 to -20 ℃. Ericssion cycle was simulated using the unipolar cycle at different temperatures. Two modes of energy harvesting were presented and analyzed:modeⅠmaxi-mizing and modeⅡminimizing harvested energy, modeⅠis idealized, by applying a low voltage, the harvested energy can reach nearly maximum. The explanation of the two modes was given from the view of microstructure. Temperature and electric field dependence was also given, at 100 kV· mm-1 , temperature from 20 to -20 ℃, giant energy can be harvested around 3 483 mJ · cm-3 . Compared with the single crystals, the advantages, such as the harvested energy increased by 10 times, working temperature decreased to room temperature, and the material flexibility, make it pos-sible as a good candidate for energy harvesting.
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