Frequency-independent self-powered sensing based on capacitive impedance matching effect of triboelectric nanogenerator

Xie, Xinkai; Zhang, Yi; Chen, Chen; Chen, Xiaoping; Yao, Tianxiang; Peng, Mingfa; Chen, Xinjian; Nie, Baoqing; Wen, Zhen; Sun, Xuhui

doi:10.1016/j.nanoen.2019.103984

Cited by 51 publications

(27 citation statements)

References 34 publications

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“…As for working mechanism, it mainly depends on the coupling effect of triboelectrification and electrostatic induction. [ 38–41 ] As shown in Figure 2e, when a force is applied, the two triboelectric layers come into contact with each other, resulting in the transfer of free electrons between the surfaces of the two triboelectric layers to a potential well. As the distance between the two triboelectric layers increases, a smaller barrier is formed and electrons remain moving between the surfaces.…”

Section: Resultsmentioning

confidence: 99%

Blue Energy Collection toward All‐Hours Self‐Powered Chemical Energy Conversion

Zhai

Wen

Chen

et al. 2020

Advanced Energy Materials

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The conversion and transmission of blue energy in the ocean are critical issues. By employing triboelectric nanogenerators (TENGs), blue energy can be harvested but the corresponding electricity transmission and storage are still great challenges. In this work, an automatic high‐efficiency self‐powered energy collection and conversion system is proposed that converts blue energy to chemical energy. A gear‐driven unidirectional acceleration TENG is designed to convert disordered and low‐frequency water wave energy to low voltage and high current DC output. The output bias from the TENG can be used to drive a Ti–Fe2O3/FeNiOOH based photoelectrochemical cell under sunlight to produce hydrogen. Moreover, under the situation without sunlight, the self‐powered system can be automatically switched to another working state to charge a Co3O4 based lithium‐ion battery. The hydrogen production rate reaches to 4.65 µL min‐1 under sunlight at the rotation speed of 120 rpm. The conversion efficiency of the whole system is calculated to be 2.29%. The system triggered by photoswitches can automatically switch between two working states with or without sunlight and convert the blue energy to either hydrogen energy or battery energy for easy storage and transmission, which widens the future applications for blue energy.

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Section: Resultsmentioning

confidence: 99%

Blue Energy Collection toward All‐Hours Self‐Powered Chemical Energy Conversion

Zhai

Wen

Chen

et al. 2020

Advanced Energy Materials

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“…[136] If a resistive or capacitive sensor is in a series connection with TENG, the output of the sensor would change with the capacitance variation of the sensor because of impedance matching between TENG and the load sensor. [136,137] In this case, TENG can only work as the power supply and the load sensor can act as the sensing component. It helps separate the triboelectric component and sensing component, which gives more choices for the triboelectric materials of TENG and ensures the sensing system more stable.…”

Section: Temperature Monitoringmentioning

confidence: 99%

“…In 2019, Xie et al introduced a self-powered temperature sensing system based on the capacitive impedance matching effect of TENG, as illustrated in Figure 13. [137] First, a conventional TENG (Figure 13a) was fabricated with copper, PTFE, and Kapton. The equivalent circuit diagram of the impedance matching system is displayed in Figure 13b, in which a capacitive sensor is in series connection with TENG.…”

Section: Temperature Monitoringmentioning

confidence: 99%

“…[114][115][116][117]131,132] Third, to increase the stability and provide more selections of triboelectric materials, TENGs are integrated with other sensors to constitute an impedance matching system or a hybrid system. [132,135,137] TENGs show great potential in healthcare electronics, but there is still a certain distance between experiments and practical applications. Further development of self-powered healthcare systems can be achieved by getting over these limitations.…”

Section: Conclusion and Prospectsmentioning

confidence: 99%

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Advances in Healthcare Electronics Enabled by Triboelectric Nanogenerators

Chen

Xie

Liu

et al. 2020

Adv Funct Materials

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104

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The treatment, diagnosis, and monitoring of diseases have attracted more and more attention in recent years. Healthcare electronics help effectively treat and real-time monitor diseases. Triboelectric nanogenerators (TENGs) show great potential for healthcare applications because of their superiority including low cost, flexible structures, and self-powered property. Herein, the recent key advancements in TENG-based healthcare applications are comprehensively reviewed. TENGs could not only harvest the mechanical energy from the body to make electrical stimulation but also generate different electrical signals in response to external stimuli. Integrated systems combined with TENGs and other sensors could also promote sensing stability. The materials, structures, working mechanisms, and performance of each application are discussed. The existing limitations and prospects for further TENG-based healthcare are finally put forward.

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“…Additionally, by utilizing the generated electrical signals, self-powered active sensors based on TENG have been developed for detecting motion, pressure, resonant, sleep monitoring, ion concentration, temperature, tilt of direction, and angle [18][19][20][21][22][23][24][25][26][27]. In particular, various models have been studied for self-powered sensors measuring wind speed and direction [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

A Self-Powered and Low Pressure Loss Gas Flowmeter Based on Fluid-Elastic Flutter Driven Triboelectric Nanogenerator

Phan

Wang

et al. 2020

Sensors

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A self-powered and low pressure loss gas flowmeter is presently proposed and developed based on a membrane’s flutter driven triboelectric nanogenerator (TENG). Such a flowmeter, herein named “TENG flowmeter”, is made of a circular pipe in which two copper electrodes are symmetrically fixed and a nonconductive, thin membrane is placed in the middle plane of the pipe. When a gas flows through the pipe at a sufficiently high speed, the membrane will continuously oscillate between the two electrodes, generating a periodically fluctuating electric voltage whose frequency can be easily measured. As demonstrated experimentally, the fluctuation frequency (fF) relates linearly with the pipe flow mean velocity (Um), i.e., fF ∝ Um; therefore, the volume flow rate Q (=Um × A) = C1fF + C2, where C1 and C2 are experimental constants and A is the pipe cross-sectional area. That is, by the TENG flowmeter, the pipe flow rate Q can be obtained by measuring the frequency fF. Notably, the TENG flowmeter has several advantages over some commercial flowmeters (e.g., vortex flowmeter), such as considerable lower pressure loss, higher sensitiveness of the measured flow rate, and self-powering. In addition, the effects of membrane material and geometry as well as flow moisture on the flowmeter are investigated. Finally, the performance of the TENG flowmeter is demonstrated.

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Frequency-independent self-powered sensing based on capacitive impedance matching effect of triboelectric nanogenerator

Cited by 51 publications

References 34 publications

Blue Energy Collection toward All‐Hours Self‐Powered Chemical Energy Conversion

Blue Energy Collection toward All‐Hours Self‐Powered Chemical Energy Conversion

Advances in Healthcare Electronics Enabled by Triboelectric Nanogenerators

A Self-Powered and Low Pressure Loss Gas Flowmeter Based on Fluid-Elastic Flutter Driven Triboelectric Nanogenerator

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