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Biocompatible CaTiO3-PVDF composite-based piezoelectric nanogenerator for exercise evaluation and energy harvesting
Nano Energy ( IF 17.6 ) Pub Date : 2022-08-08 , DOI: 10.1016/j.nanoen.2022.107682
Swati Panda, Sugato Hajra, Haejin Jeong, Basanta Kumar Panigrahi, Phakkhananan Pakawanit, Deepak Dubal, Seonki Hong, Hoe Joon Kim

Biocompatible energy-harvesting platforms can significantly promote the development of self-powered devices to improve the human lifestyle. However, the low power of these devices is a bottleneck and requires an alternative power source. Herein, we have developed calcium titanate (CTO) perovskite-based polymeric composite (polyvinylidene fluoride (PVDF)) as a piezoelectric nanogenerator (PENG) to be used as a power source. X-ray tomography images confirm that CTO particles are well dispersed inside the PVDF matrix. It is realized that the electrical output of the device increases with the addition of CTO in PVDF. The maximum device performance was observed for 8 wt. % CTO-PVDF composite film with an output voltage of 20 V, current of 250 nA, and power density of 0.19 μW/cm2 at 108 Ω. The PENG delivered a consistent output and could charge commercial capacitors demonstrating its potential as a sustainable power source. Moreover, the biocompatibility of CTO-PVDF film was validated by NIH3T3 cells. The CTO-PVDF composite-based PENG device was installed in the heel area to collect the signal generated from the skipping practice of individuals. The digital signal processing techniques and the artificial neural network (ANN) were utilized to detect the skipping patterns. Such a self-powered activity tracker unit will correctly monitor human health, preventing severe chronic conditions such as knee pain, calf strain, and plantar fasciitis.



中文翻译:

用于运动评估和能量收集的生物相容性 CaTiO3-PVDF 复合压电纳米发电机

生物相容性能量收集平台可以显着促进自供电设备的发展,从而改善人类生活方式。然而,这些设备的低功耗是一个瓶颈,需要替代电源。在此,我们开发了钛酸钙(CTO)钙钛矿基聚合物复合材料(聚偏二氟乙烯(PVDF))作为压电纳米发电机(PENG)用作电源。X 射线断层扫描图像证实 CTO 颗粒很好地分散在 PVDF 基质内。可以看出,随着在 PVDF 中添加 CTO,器件的电输出会增加。观察到 8 wt 的最大器件性能。% CTO-PVDF复合薄膜,输出电压20 V,电流250 nA,10 8时功率密度0.19 μW/cm 2Ω。PENG 提供了稳定的输出,可以为商用电容器充电,展示了其作为可持续电源的潜力。此外,通过NIH3T3细胞验证了CTO-PVDF薄膜的生物相容性。基于 CTO-PVDF 复合材料的 PENG 装置安装在脚跟区域,以收集个人跳绳练习产生的信号。数字信号处理技术和人工神经网络(ANN)被用来检测跳跃模式。这种自供电活动跟踪器单元将正确监测人类健康,预防严重的慢性疾病,如膝盖疼痛、小腿拉伤和足底筋膜炎。

更新日期:2022-08-08
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