Graphene Based Triboelectric Nanogenerators Using Water Based Solution Process
Graphene Based Triboelectric Nanogenerators Using Water Based Solution Process
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DOI：
10.3389/fphy.2021.742563
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发表时间：
2021-10
期刊：
影响因子：
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通讯作者：
I. Domingos;A. Neves;M. Craciun;H. Alves
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文献类型：
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作者：
I. Domingos;A. Neves;M. Craciun;H. Alves
个人电子产品的快速发展对便携式和可持续电源提出了挑战性的要求。例如，在可穿戴技术中，可穿戴体域网的概念将身体运动和生命体征监测协同在一起。为此，一个关键方面是可持续的便携式能源，随时随地可用，如摩擦电纳米发电机（TENG）所产生的。这种技术通常需要高成本的工艺和材料，并且仍然遭受低功率输出，以及由于具有可变强度的电荷生成刺激而导致的不稳定的输出值。在这项工作中，我们提出了TENG使用剪切剥离的石墨烯作为电极，以及通过简单的溶液工艺沉积的活性摩擦电层。石墨烯与聚合物如聚二甲基硅氧烷（PDMS）的组合用于使用低成本溶液加工方法生产TENG器件。使用循环物理刺激测试器械发电，以便更好地控制和了解器械输出。当以1.5 Hz刺激时，这些材料的摩擦电响应分别显示出约233 V和731 nA的开路电压（Voc）和短路电流（Isc）。在200 MΩ的负载下实现了13.14 μW/cm 2的功率密度，与用铝和PDMS制成的器件相比，这可以高出40倍。这些结果表明，使用接触和位置传感器的健康和安全应用的自可持续的可穿戴便携式纳米发电机的低成本摩擦电设备的解决方案过程的潜力。
A rapid development in personal electronics has raised challenging requirements for portable and sustainable power sources. For example, in wearable technologies, the concept of wearable body area network brings body motion and vital signs monitoring together in synergy. For this, a key aspect is sustainable portable energy, available anywhere, at any time, as generated by triboelectric nanogenerators (TENG). This technology usually demands high-cost processes and materials and still suffer from low power output, as well as unstable output values due to charge generating stimulus with variable intensities. In this work, we present TENGs using shear exfoliated graphene as electrodes as well as active triboelectric layer deposited by a simple solution process. Graphene in combination with polymers such as polydimethylsiloxane (PDMS) were used to produce TENG devices using low-cost solution processing methods. Device electrical power generation was tested with a cyclic physical stimulus for better control and understanding of device output. The triboelectric response of these materials showed open circuit voltages (Voc) and short-circuit currents (Isc)of approximately 233 V and 731 nA respectively when stimulated at 1.5 Hz. A power density of 13.14 μW/cm2 under a load of 200 MΩ was achieved, which can be 40 times higher when compared to devices made with aluminum and PDMS. These results demonstrate the potential of solution process for low-cost triboelectric devices for self-sustainable wearable portable nanogenerators on health and security applications using contact and positional sensors.