Frequency-independent self-powered sensing based on capacitive impedance matching effect of triboelectric nanogenerator
Frequency-independent self-powered sensing based on capacitive impedance matching effect of triboelectric nanogenerator
复制标题
基于摩擦纳米发电机电容阻抗匹配效应的频率无关自供电传感
DOI：
10.1016/j.nanoen.2019.103984
复制
发表时间：
2019-11
期刊：
影响因子：
17.6
通讯作者：
Sun Xuhui
中科院分区：
文献类型：
--
作者：
Xie Xinkai;Zhang Yi;Chen Chen;Chen Xiaoping;Yao Ting;Peng Mingfa;Chen Xinjian;Nie Baoqing;Wen Zhen;Sun Xuhui
智能物联网（IoT）的发展需要大量独立的传感器，而传感器的供电问题阻碍了其发展。在这项工作中，我们提出了一个概念的频率无关的自供电传感技术的基础上的电容阻抗匹配效应的摩擦纳米发电机（TENG）。当TENG的本征电容恒定并与外部容性负载匹配时，输出电压仅与外部容性负载有关，而不受TENG工作频率的影响。在所提出的系统中，垂直触点分离TENG的输出电压仅在10 pF至10 nF的负载电容范围内从~140 V明显变化到~5 V，而电压在宽范围内的不同移动频率下不变化。通过用基于甘油液滴的电容式温度传感器代替外部电容负载，可以实现可量化的温度传感和与频率无关的高温报警系统。该自供电传感系统在传感材料的广泛选择性和不同运动频率下的高可靠性方面取得了重大进展，显示了其在智能可穿戴传感电子学中的广阔应用前景。
The advance of intelligent Internet of Things (IoT) requires a large number of independent sensors, while the power supply of the sensors has hindered its development. In this work, we present a concept of frequency-independent self-powered sensing technology based on the capacitive impedance matching effect of triboelectric nanogenerator (TENG). When the intrinsic capacitance of the TENG is constant and matched with an external capacitive load, the output voltage is only related to the external capacitive load and not affected by the working frequency of TENG. In a proposed system, the output voltage of a vertical contact-separation TENG distinctly changes from ~140 V to ~5 V only with a load capacitance ranging from 10 pF to 10 nF, while the voltage does not change at different moving frequencies in a wide range. By replacing the external capacitive load with a glycerol-droplet based capacitive temperature sensor, both quantifiable temperature sensing and frequency-independent high temperature alarming system can be realized. Significant progresses in broad selectivity for sensing materials and high reliability under different motion frequencies are present in this self-powered sensing system, revealing the promising application prospects in intelligent wearable sensing electronics.
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