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首页> 外文期刊>Smart Materials & Structures >High performance of macro-flexible piezoelectric energy harvester using a 0.3PIN-0.4Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) flake array
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High performance of macro-flexible piezoelectric energy harvester using a 0.3PIN-0.4Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) flake array

机译：使用0.3PIN-0.4Pb（Mg1 / 3Nb2 / 3）O-3-0.3PbTiO（3）薄片阵列的高性能大型柔性压电能量收集器

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Harvesting energy from human motion to power wearable devices using flexible piezoelectric energy harvesters is becoming a hot research topic, since this approach could fix the charging problem related to batteries and would do no harm to the environment. Unlike nano-generators, which have a piezoelectric material thickness at the level of a few nm to a few mu m, we present a high-performance macro-flexible piezoelectric energy harvester (MF-PEH) with a piezoelectric material thickness of 45 mu m, based on a 0.3PIN-0.4PMN-0.3PT (PIMNT) long flake array with an optimized cut. The piezoelectric properties of (110)-oriented PIMNT were studied as a function of thickness and compared to those of 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) (PMNT). The electrical properties of this device under different strain and load resistances are studied systematically. The results of our experiment show that under a strain of 0.225%, the open-circuit voltage and short-circuit current of MF-PEH reach levels as high as 23.2 V and 0.105 mA (at an excitation frequency of 1.1 Hz), respectively, with a maximum electric output power of 245 mu W across a piezoelectric materials area of 400 mm(2). We have also used the device to harvest mechanical energy from the motion of human knees and charge a battery successfully. Efficient conversion from mechanical energy to electric energy and large output power demonstrate that our MF-PEH is an important complement to flexible energy harvesters and a potential candidate as a self-powered source for wearable low-power electronics.
机译：使用柔性压电能量收集器将能量从人体运动收集到可穿戴设备中，已成为一个热门研究课题，因为这种方法可以解决与电池相关的充电问题，并且不会对环境造成危害。与纳米发电机的压电材料厚度在几纳米到几微米的水平不同，我们提出了一种高性能的宏观柔性压电能量收集器（MF-PEH），压电材料厚度为45微米，基于具有优化切割效果的0.3PIN-0.4PMN-0.3PT（PIMNT）长片状阵列。研究了（110）取向PIMNT的压电性能随厚度的变化，并与0.7Pb（Mg1 / 3Nb2 / 3）O-3-0.3PbTiO（3）（PMNT）的压电性能进行了比较。系统地研究了该器件在不同应变和负载电阻下的电性能。我们的实验结果表明，在0.225％的应变下，MF-PEH的开路电压和短路电流分别达到23.2 V和0.105 mA（在1.1 Hz的激励频率下），在400 mm（2）的压电材料区域上的最大输出功率为245μW。我们还使用了该设备从膝盖运动中收集机械能并成功为电池充电。从机械能到电能和大输出功率的有效转换表明，我们的MF-PEH是柔性能量收集器的重要补充，并且是可穿戴低功耗电子设备的自供电来源的潜在候选者。

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