Laboratory of Electrical Engineering and Ferroelectricity, Institut National des Sciences Appliquees de Lyon, France.
IEEE Trans Ultrason Ferroelectr Freq Control. 2011 Jan;58(1):30-42. doi: 10.1109/TUFFC.2011.1771.
Harvesting systems capable of transforming unused environmental energy into useful electrical energy have been extensively studied for the last two decades. The recent development of electrostrictive polymers has generated new opportunities for harvesting energy. The contribution of this study lies in the design and validation of electrostrictive polymer- based harvesters able to deliver dc output voltage to the load terminal, making the practical application of such material for self-powered devices much more realistic. Theoretical analysis supported by experimental investigations showed that an energy harvesting module with ac-to-dc conversion allows scavenging power up to 7 μW using a bias electric field of 10 V/μm and a transverse strain of 0.2%. This represents a power density of 280 μW/cm(3) at 100 Hz, which is much higher than the corresponding values of most piezo-based harvesters.
在过去的二十年中，人们广泛研究了能够将未使用的环境能量转化为有用电能的采集系统。最近电致伸缩聚合物的发展为能量采集带来了新的机遇。这项研究的贡献在于设计和验证了能够向负载端提供直流输出电压的电致伸缩聚合物采集器，使得此类材料在自供电设备中的实际应用更加现实。实验研究支持的理论分析表明，采用交流到直流转换的能量采集模块，利用 10 V/μm 的偏置电场和 0.2%的横向应变，可以采集高达 7 μW 的功率。这代表在 100 Hz 时的功率密度为 280 μW/cm(3)，远高于大多数基于压电的采集器的相应值。
