Nanopillar- and Nanocone-Structured SrTiO3/PDMS Films for Triboelectric Nanogenerators

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY ACS Applied Nano Materials Pub Date : 2024-06-13 DOI:10.1021/acsanm.4c01713

Xiao Meng, Datai Hui, Shaobo Ge, Shun Zhou, Xiaoying Hu, Dabin Lin* and Weiguo Liu*,

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Abstract

The triboelectric nanogenerator (TENG) is an emerging technology to convert energy for powering electrical devices. Extensive strategies have been studied to enhance the output performance of TENG. Herein, nanopillar- and nanocone-structured SrTiO₃ (STO)/PDMS composite films with different STO concentrations were fabricated as the dielectric layer. The effects of the morphologies of nanostructured composite films produced by the anodic aluminum oxide (AAO) template method on the dielectric and electric properties of the TENG were investigated. The dielectric constant of the structured composite film increased with the concentration of STO nanoparticles and is negligible depending on the frequency from 10² to 10⁶ Hz. The 9 wt % STO/PDMS composite film with a nanocone structure (aspect ratio = 3) shows the highest dielectric constant value at 4.85. The dielectric loss of nanostructured composite films is steady at 0.01 from 1 × 10³ to 1 × 10⁶ Hz. In addition, the electrical performance of TENG with the nanocone-structured composite films is greater than the nanopillar structure based, and the electric properties are promoted with the nanostructure aspect ratio. Meanwhile, the increased STO concentrations of the composite film significantly enhanced the electric properties of TENG as well. The Voc and Isc of TENG reached about 130 V and 1.4 μA with 9 wt % STO/PDMS nanocone-structured (aspect ratio = 3) composite film. Furthermore, the output voltage and charge density of various nanostructured films were numerically calculated using the Finite Element Method (FEM) in COMSOL Multiphysics, which shows good agreement with the experimental results. Finally, the fabricated TENG device was utilized to power the commercial LEDs and electric devices successfully. As the ideal self-powered sensing device, the portable and functional TENG shows attractive potential of application in the field of self-powered sensing systems and flexible devices.

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用于三电纳米发电机的纳米柱状和纳米锥状结构 SrTiO3/PDMS 薄膜

三电纳米发电机（TENG）是一种为电气设备供电的新兴能量转换技术。为了提高 TENG 的输出性能，人们研究了大量策略。在此，研究人员制作了不同STO浓度的纳米柱和纳米锥结构的SrTiO3（STO）/PDMS复合薄膜作为介电层。研究了阳极氧化铝（AAO）模板法制备的纳米结构复合薄膜的形貌对 TENG 介电性质和电性质的影响。结构复合薄膜的介电常数随 STO 纳米粒子浓度的增加而增加，在 102 至 106 Hz 频率范围内可忽略不计。具有纳米锥结构（纵横比 = 3）的 9 wt % STO/PDMS 复合薄膜的介电常数值最高，为 4.85。从 1 × 103 到 1 × 106 Hz，纳米结构复合薄膜的介电损耗稳定在 0.01。此外，纳米锥结构复合薄膜的 TENG 电性能高于基于纳米柱结构的薄膜，并且电性能随纳米结构长宽比的增加而提高。同时，复合薄膜中 STO 浓度的增加也显著提高了 TENG 的电性能。采用 9 wt % STO/PDMS 纳米锥结构（纵横比 = 3）的复合薄膜，TENG 的 Voc 和 Isc 分别达到约 130 V 和 1.4 μA。此外，还使用 COMSOL Multiphysics 中的有限元法（FEM）对各种纳米结构薄膜的输出电压和电荷密度进行了数值计算，结果与实验结果非常吻合。最后，制备的 TENG 器件被成功用于为商用 LED 和电子设备供电。作为理想的自供电传感设备，便携式功能性 TENG 在自供电传感系统和柔性设备领域展现出诱人的应用潜力。

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来源期刊

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.