Ju Qianqian, Zu Guoqing, Wu Hui, Yang Xijia
Key Laboratory of Advanced Structural Materials, Ministry of Education & School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, P. R. China.
School of Mechanical, Materials, Mechatronic and Biomedical Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
ACS Appl Mater Interfaces. 2024 Oct 9;16(40):54412-54422. doi: 10.1021/acsami.4c10157. Epub 2024 Sep 30.
As science and technology advance, people are increasingly inclined to use sustainable and portable wearable electronic devices. The traditional supporting power source, batteries, suffers from issues of flexibility and lifespan, severely constraining the development of wearable devices. Alternatively, the self-powered system, serving as a power source, can effectively collect energy from the surrounding environment, achieving maintenance-free operation and high adaptability, which has attracted widespread research. The coaxial fiber-structured self-powering system proposed in this study is based on a supercapacitor (SC) and a triboelectric nanogenerator (TENG). The carbon fiber (CF) has polyaniline (PANI) and rGO connected to it, and a friction layer of silicone rubber is wrapped around the outside. The conductivity of the fiber was increased by multiple PANI graftings, and a coaxial fiber-type TENG with a 2 mm diameter was created. Following weaving, the TENG displays a high power density of 576 mW m and an open-circuit voltage of 160 V and a short-circuit current of 9 μA. In addition, the flexible fiber-shaped supercapacitor uses NiAl-LDHs@CF as the negative electrode and AC@CF as the positive electrode, showing a specific capacitance of up to 281.4 mF cm. Furthermore, the SC and TENG are assembled into a coaxial self-power supply system, which has excellent performance and shows extensive potential applications in the field of wearable device power supply.
随着科学技术的进步，人们越来越倾向于使用可持续且便携的可穿戴电子设备。传统的支持电源，即电池，存在灵活性和寿命方面的问题，严重制约了可穿戴设备的发展。相比之下，作为电源的自供电系统能够有效地从周围环境中收集能量，实现免维护运行和高适应性，这引起了广泛的研究。本研究中提出的同轴纤维结构自供电系统基于超级电容器（SC）和摩擦纳米发电机（TENG）。碳纤维（CF）连接有聚苯胺（PANI）和还原氧化石墨烯（rGO），并且在外部包裹有硅橡胶摩擦层。通过多次聚苯胺接枝提高了纤维的导电性，并制造出了直径为2毫米的同轴纤维型TENG。编织后，TENG显示出576 mW m的高功率密度、160 V的开路电压和9 μA的短路电流。此外，柔性纤维状超级电容器使用NiAl-LDHs@CF作为负极，AC@CF作为正极，显示出高达281.4 mF cm的比电容。此外，将SC和TENG组装成同轴自供电系统，该系统具有优异的性能，并在可穿戴设备电源领域显示出广泛的潜在应用。
