Ferroelectric/ferroelastic switching, which can generate greater charge flows than piezoelectricity for the conversion of mechanical energy into electrical energy, has great potential for novel transducers. In this work, a stress-driven ferroelectric/ferroelastic energy harvester, exploiting internal bias fields in a partially poled ferroelectric, is explored. The harvester is tested and optimized for low-frequency applications, and the effects of electrical load impedance and operating frequency are studied. The device has a simple configuration and offers power density up to about 20 mW/cm³ of active material in the 1–20 Hz frequency range, which is a significant advance over piezoelectric transducers. Additionally, the results show that the energy output at a specific frequency can be optimized through appropriate choice of load impedance, and the optimized cycle works for over $10^7$ cycles at 20 Hz with only slight fatigue degradation, where the peak voltage decreases by 13% and an accompanying 24% drop in average power output. This provides a new perspective for energy harvesting to maximize energy conversion based on ferroelectric/ferroelastic switching with controllable performance.

铁电/铁弹性开关可以产生比压电更大的电荷流，用于将机械能转换为电能，在新型换能器方面具有巨大潜力。在这项工作中，探索了一种应力驱动的铁电/铁弹性能量收集器，它利用部分极化铁电体中的内部偏置场。收割机针对低频应用进行了测试和优化，并研究了电气负载阻抗和工作频率的影响。该设备配置简单，在 1–20 范围内提供高达约 20  mW/cm ³活性材料的功率密度 Hz 频率范围，这是压电换能器的重大进步。Additionally, the results show that the energy output at a specific frequency can be optimized through appropriate choice of load impedance, and the optimized cycle works for over$\mathrm{1个}{0}^7$以 20 Hz 的频率循环，只有轻微的疲劳退化，峰值电压降低 13%，平均功率输出随之下降 24%。这为能量收集提供了一个新的视角，可以基于性能可控的铁电/铁弹性开关来最大化能量转换。