Nanostructured versus flat compact electrode for triboelectric nanogenerators at high humidity

Karimi, Masoume; Seddighi, Sadegh; Mohammadpour, Raheleh

doi:10.1038/s41598-021-95621-3

Cited by 25 publications

(13 citation statements)

References 76 publications

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“…The RH dependence of the SM-TVNG output has also been analyzed (Figure d). An increased and then decreased tendency was discovered with the increase of RH, which is quite different from those of TENGs, where they decreased always as a whole . It is believed that the surface state density of 4H-SiC increases, the Schottky barrier increases, and the carrier driving force as a result of the built-in electric field increases with the increase of RH, resulting in an increase of the electronic output. , If the RH surpasses 80%, the surface Schottky barrier becomes extremely high as a result of the filling of vast water vapor and the probability of the electronic transition is reduced; thus, the output is reduced.…”

Section: Resultsmentioning

confidence: 92%

Wear-Resisting and Stable 4H-SiC/Cu-Based Tribovoltaic Nanogenerators for Self-Powered Sensing in a Harsh Environment

Xia

Luo

et al. 2022

ACS Appl. Mater. Interfaces

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Tribovoltaic nanogenerators (TVNGs) are an emerging class of devices for high-entropy energy conversion and mechanical sensing that benefit from their outstanding real-time direct current output characteristics. Here, a self-powered TVNG was fabricated using a small-area 4H-SiC semiconductor wafer and a large-area copper foil. Thus, the cost of materials remains low compared to devices employing large-scale semiconductors. The 4H-SiC/metal-TVNGs (SM-TVNGs) presented here are sensitive to vertical force and sliding velocity, making them appropriate for mechanical sensing. Notably, owing to the modulated bindingtons and surface states, these SM-TVNGs performed well in a harsh environment, namely, in high-temperature and high-humidity conditions. In addition, the SM-TVNGs exhibited an excellent wear-resisting property. On these bases, we designed a self-powered and real-time monitoring device able to estimate the number of staff present in various areas of a deep mining site, a high-temperature and high-humidity environment. This work not only discloses basic physics behind the tribovoltaic effect but also sheds light on possible applications of SM-TVNGs for wearresisting and stable mechanical sensors in harsh environments.

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Section: Resultsmentioning

confidence: 92%

Wear-Resisting and Stable 4H-SiC/Cu-Based Tribovoltaic Nanogenerators for Self-Powered Sensing in a Harsh Environment

Xia

Luo

et al. 2022

ACS Appl. Mater. Interfaces

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“…For this reason, the contact area is often maximized by different types of micro-or nanosurface structuring techniques. [39,40] In this work, each layer was produced in the form of fiber mats by electrospinning in order to achieve fibrils with diameters ranging from <100 nm up to ≈1 µm. Electrospinning is one of the simplest, versatile, efficient, scalable, and cost-effective methods for producing sub-micrometer fibers and high surface area nonwoven mats.…”

Section: Resultsmentioning

confidence: 99%

A Forest‐Based Triboelectric Energy Harvester

et al. 2022

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Triboelectric nanogenerators (TENGs) are a new class of energy harvesting devices that have the potential to become a dominating technology for producing renewable energy. The versatility of their designs allows TENGs to harvest mechanical energy from sources like wind and water. Currently used renewable energy technologies have a restricted number of materials from which they can be constructed, such as metals, plastics, semiconductors, and rare‐earth metals. These materials are all non‐renewable in themselves as they require mining/drilling and are difficult to recycle at end of life. TENGs on the other hand can be built from a large repertoire of materials, including materials from bio‐based sources. Here, a TENG constructed fully from wood‐derived materials like lignin, cellulose, paper, and cardboard, thus making it 100% green, recyclable, and even biodegradable, is demonstrated. The device can produce a maximum voltage, current, and power of 232 V, 17 mA m–2, and 1.6 W m–2, respectively, which is enough to power electronic systems and charge 6.5 µF capacitors. Finally, the device is used in a smart package application as a self‐powered impact sensor. The work shows the feasibility of producing renewable energy technologies that are sustainable both with respect to their energy sources and their material composition.

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“…The top positive layer is designed with the dimension of 1 μm diameter and 0.2 μm thickness, the same act as the terminal also. The two opposite dielectric polarity layers are separated with a 0.915 mm interval. − …”

Section: Methodsmentioning

confidence: 99%

Effective Modeling and Numerical Simulation of Triboelectric Nanogenerator for Blood Pressure Measurement Based on Wrist Pulse Signal Using Comsol Multiphysics Software

Venugopal

Shanmugasundaram

2022

ACS Omega

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Among the wearable sensor family, the triboelectric nanogenerator has excellent potential in human healthcare systems due to its small size, self-powered, and low cost. Here is the design and simulation of the triboelectric nanogenerator using the 3D model in COMSOL Multiphysics software for blood pressure measurement. As a reliable indicator of human physiological health, blood pressure (BP) has been utilized in more and more cases to predict and diagnose potential diseases and the dysfunction caused by hypertension. The main focus of this study is to prognosis and preserve human health against BP. It is one of the significant challenges in predicting and diagnosing BP in the human lifestyle. The self-powered triboelectric nanogenerator can diagnose BP using the wrist pulse pressure. To optimize the performance of the modeled triboelectric nanogenerator, the known wrist pulse pressure is applied explicitly, which converts the applied pressure into an equivalent electrical signal across the output terminals. An output open circuit voltage for the applied pulse pressure is 26 V. The generated output electrical signal is proportional to the applied pulse pressure, which is used to know the BP range. It ensures that the triboelectric nanogenerator is an opted sensor to sense the minute nadi pressure signal. This work validates that the simulated model has the potential to act as several health care monitors such as respiratory rate, heart rate, glucose range, joint motion sensing, gait, and CO 2 detectors.

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Nanostructured versus flat compact electrode for triboelectric nanogenerators at high humidity

Cited by 25 publications

References 76 publications

Wear-Resisting and Stable 4H-SiC/Cu-Based Tribovoltaic Nanogenerators for Self-Powered Sensing in a Harsh Environment

Wear-Resisting and Stable 4H-SiC/Cu-Based Tribovoltaic Nanogenerators for Self-Powered Sensing in a Harsh Environment

A Forest‐Based Triboelectric Energy Harvester

Effective Modeling and Numerical Simulation of Triboelectric Nanogenerator for Blood Pressure Measurement Based on Wrist Pulse Signal Using Comsol Multiphysics Software

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