Mechanical micro-energy harvesting is a promising technology that could provide energy to small-scale sensors and other microelectronics without the need for traditional power sources. One such mechanism, called the piezoelectrochemical (PEC) effect, is of particular interest because many PEC systems have higher theoretical energy densities than other mechanical energy harvesters. This energy-harvesting mechanism has been demonstrated in multiple systems, including commonly used electrodes for lithium-ion batteries. However, due to the large variety of materials, it is difficult to consistently compare the utility of PEC systems, which makes the selection and optimization of PEC energy harvesters challenging. Here, we propose using figures of merit including short-circuit current ($\text{Δ}{I}_{SC})$, open-circuit voltage ($\text{Δ}{V}_{OC}),$fill factor ($FF$), and efficiency (${\eta }_{EC}$), which provide a unifying scheme to quantify the performance of different PEC systems. We experimentally validate this approach and demonstrate ways to increase voltage and current outputs of these harvesters.

机械微能量收集是一种有前途的技术，可以在不使用传统电源的情况下为小型传感器和其他微电子提供能量。其中一种被称为压电电化学（PEC）效应的机制特别受关注，因为许多PEC系统具有比其他机械能量收集器更高的理论能量密度。这种能量收集机制已在多种系统中得到了证明，包括用于锂离子电池的常用电极。但是，由于材料种类繁多，很难始终如一地比较PEC系统的效用，这使PEC能量收集器的选择和优化面临挑战。在这里，我们建议使用包括短路电流（$\text{Δ}{\mathrm{一世}}_{\mathrm{小号}C}）$， 开路电压 （$\text{Δ}{V}_{ØC}），$填充因子（$FF$）和效率（${\eta }_{ËC}$），它提供了一个统一的方案来量化不同PEC系统的性能。我们通过实验验证了这种方法并演示了增加这些收割机的电压和电流输出的方法。