Sarkar Debmalya, Das Namrata, Saikh Md Minarul, Biswas Prosenjit, Das Solanky, Das Sukhen, Hoque Nur Amin, Basu Ruma
Department of Physics, Jadavpur University, Kolkata, West Bengal 700032, India.
General Degree College at Pedong, Kalimpong, West Bengal 734311, India.
ACS Omega. 2021 Oct 25;6(43):28710-28717. doi: 10.1021/acsomega.1c03374. eCollection 2021 Nov 2.
Energy harvesting from natural resources has gained much attention due to the huge increase in the demand for portable electronic devices and the shortage of conventional energy resources in general. In the present work, the fabrication and realistic applications of a piezoelectric nanogenerator (PENG) using polydimethylsiloxane (PDMS) and the abundantly available, environment-friendly natural fiber (SA) have been discussed. The biocompatible, low-cost SA fibers were flexible enough and showed high piezoelectric properties as active materials in the study. The SA pappus based piezoelectric nanogenerator demonstrated its ability to convert the harvested biomechanical energy into electrical energy from the various mechanical energy sources available in our environment. The SA pappus/PDMS thin film based piezoelectric nanogenerator (SPENG) fabricated in the laboratory showed colossal output performances (open circuit output voltage, ∼81.2 V; short circuit current, ∼1.0 μA) by continuous finger impartation. Uniform output performance was also obtained by the application of uniform force on the devices (e.g., ∼42 V for 5 N force at 10 Hz frequency). The SPENG was capable to charge a 2.2 μF capacitor to 3.2 V within a short time span (16 s) under continuous finger impartation and illuminate 39 commercial high-power blue LEDs that were connected in series. Thus, the fabricated SPENG can be used as a green and portable energy source to power up portable electronic devices. Apart from this, the SPENG may also be used as a self-powered energy supply for pacemakers or different types of health care units if properly improvised.
由于便携式电子设备需求的大幅增长以及常规能源资源总体短缺，从自然资源中获取能量已备受关注。在当前工作中，已讨论了使用聚二甲基硅氧烷（PDMS）和大量可得、环境友好的天然纤维（SA）制造压电纳米发电机（PENG）及其实际应用。在该研究中，具有生物相容性、低成本的SA纤维足够柔韧，并作为活性材料表现出高压电性能。基于SA绒毛的压电纳米发电机展示了其将从我们环境中可用的各种机械能来源收集的生物机械能转化为电能的能力。在实验室制造的基于SA绒毛/PDMS薄膜的压电纳米发电机（SPENG）通过连续手指施加力显示出巨大的输出性能（开路输出电压，约81.2 V；短路电流，约1.0 μA）。通过在器件上施加均匀力（例如，在10 Hz频率下5 N力时约42 V）也获得了均匀的输出性能。在连续手指施加力的情况下，SPENG能够在短时间跨度（16秒）内将一个2.2 μF的电容器充电至3.2 V，并点亮39个串联连接的商用高功率蓝色发光二极管。因此，制造的SPENG可用作绿色且便携式的能量源为便携式电子设备供电。除此之外，如果进行适当改进，SPENG还可作为起搏器或不同类型医疗保健单元的自供电能源供应。
