エレクトレットによる非定常熱環境発電に関する研究

本文提出了一种驻极体增强型热释电能量采集器，该热释电能量采集器采用一种新型的热力学循环，可以有效地从温度波动中采集能量。PMN-PT具有高热释电系数、低介电常数和高电阻率，是一种很有前途的候选材料。热释电系数和介电常数的场依赖性被验证，并且对于34 MV/m的PMN-PT，可以预期52%的标度卡诺效率。PMN-PT的一致和高功率输出已被证实与各种热输入信号。在20 mHz 18 °C温度循环下获得0.03 mJ/cm 2K的能量密度，而由于0.5 MV/m的低场，定标卡诺效率被限制为0.42%。薄膜结构是通过驻极体的高电场实现高效率的关键。

An electret-enhanced pyroelectric energy harvester has been proposed in this study with a novel thermodynamic cycle to effectively harvest energy from temperature fluctuations.PMN-PT is a promising candidate with a high pyroelectric coefficient, low permittivity, and high resistivity. Field dependence of pyro-coefficient and permittivity is verified, and 52% scaled Carnot efficiency can be expected for PMN-PT with 34 MV/m. The consistent and high power output of PMN-PT has been confirmed with various thermal input signals. Energy density of 0.03 mJ/cm2K is obtained with a 20 mHz 18 °C temperature cycle, while the scaled Carnot efficiency is limited to 0.42 % due to a low field of 0.5 MV/m. The thin-film structure is the key to realizing high efficiency via high field from the electret.