Related references
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Haitao Wang et al.
Summary: Effective strategies for improving the performance of a droplet-based electricity generator (DEG) are proposed, including introducing an intermediate layer of cyclic transparent optical polymer (CYTOP) by adjusting the thickness, injecting ionized ions into the surface, and increasing the surface area. Positive effects of the introduction of a CYTOP layer on outputs, especially with a greater thickness, surface ionized-air modification, and larger surface area, were observed, which could promote the practical application of DEG in energy harvesting.
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Summary: Contact electrification (or triboelectrification) is a universal phenomenon that occurs between any two materials or two phases of materials. The current output varies when different materials come into contact. The tribovoltaic effect, discovered in recent years, refers to the direct current flowing between the top electrode of a p-type semiconductor and the bottom of an n-type semiconductor when they slide against each other. This effect is caused by the generation of electron-hole pairs at the PN junction, due to the energy released from the formation of new chemical bonds at the interface during mechanical sliding. The tribovoltaic nanogenerator, based on this effect, has potential applications.
Review
Chemistry, Physical
Wasim Akram et al.
Summary: The single electrode mode (SE-mode) of triboelectric nanogenerators (TENGs) is easy to operate and has a simple configuration. This review summarizes the construction, applications, output performances, performance enhancing approaches, and durability of film-based SE-TENGs with various electrode materials and textile-based SE-TENGs with different fabric structures as electrodes. The challenges and future developments in SE-TENGs are also discussed.
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Summary: The composition modulation of the friction layer of triboelectric nanogenerators (TENGs) is of great significance for their output performance. In this study, xMWCNT/CS composite films with multiwalled carbon nanotubes (MWCNTs) as fillers were prepared, and a TENG based on these films was constructed. The introduction of MWCNT fillers significantly improved the dielectric constant of the films, thereby enhancing the output performance of the TENG.
ACS APPLIED MATERIALS & INTERFACES
(2023)
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Summary: Serious climate changes and energy-related environmental problems are critical issues in the world. Triboelectric nanogenerators (TENGs) have become one of the most promising mechanical energy harvesters, offering a solution to reduce carbon emissions and save the environment. Considerable advancements have been made in theory, materials, devices, systems, circuits, and applications in the TENG field, and it has reached the stage of prototype development and commercialization.
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Summary: A new type of TENG with conductive materials as triboelectric layers and electrodes is developed, which greatly increases the output current density and can work stably in high-humidity environments. This provides a new and effective strategy for constructing high-performance TENGs.
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(2023)
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Wencong He et al.
Summary: The charge transportation behaviors in dielectric liquid by self-excited liquid suspension triboelectric nanogenerator (LS-TENG) were systematically investigated. The study found that the solid-liquid triboelectrification effect, charge-liquid transmission and dissipation effect, and the homogeneous dielectric induction effect play important roles in promoting LS-TENG's output performance. LS-TENG with a dual dielectric tribolayer has advantages of slight driving force and long lifetime, achieving a high charge density and significant energy output.
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(2023)
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Summary: This study reports a fast surface charge injection technique based on air breakdown effect, which allows for directional accumulation of charge and improves the output performance of triboelectric nanogenerator. A novel charge transfer mechanism is proposed, and a method for quantifying surface charge density is given.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
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Md Al Mahadi Hasan et al.
Summary: Water droplet-driven energy-harvesting nanogenerators have emerged as a sustainable energy resource that can meet the future demand for green energy. This review summarizes the recent developments in droplets-driven nanogenerators, discusses the device structures and applications, and outlines the future possibilities.
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(2022)
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Yana Xiao et al.
Summary: The addition of graphitic carbon nitride (g-C3N4) enhances the electrical performance of the triboelectric nanogenerator (TENG), making it lightweight, soft, highly porous, and rugged. By gentle hand clapping, the assembled TENG can light up 40 light-emitting diodes and power electronic watches or calculators.
Article
Chemistry, Physical
Xiaoping Chen et al.
Summary: In this study, a MXene/TiO2 hybrid film was prepared as an intermediate layer in a TENG to regulate and store charges, thereby improving the output performance of the TENG.
Article
Chemistry, Multidisciplinary
Qi Zhang et al.
Summary: This study focuses on the performance bottleneck of DEGs, proposing a switch effect based on EDLC and establishing an equivalent circuit model to explain its working mechanism. It is found that a single droplet without pre-charging can generate over 100 V of high voltage, and the output is improved by two orders of magnitude compared to TEI.
ADVANCED MATERIALS
(2021)
Review
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Weon-Guk Kim et al.
Summary: With the rapid growth of the Internet of Things (IoT), the utilization of sensors is projected to surpass 200 billion by 2025. The triboelectric nanogenerator (TENG) has gained significant attention as an energy harvester due to its high output power, eco-friendly fabrication, and customizable working modes. It extracts electrical energy from wasted mechanical energy and offers various operational modes and charge transfer mechanisms for enhancing energy efficiency.
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Chemistry, Physical
Xinkai Xie et al.
Summary: TENG output is limited by air breakdown effect, and optimizing the intermediate layer is crucial for improving output performance. The working mechanisms of different materials and the influences of structural parameters on output deserve further exploration.
Article
Chemistry, Physical
Zhao Wang et al.
Summary: This study presents a simple and efficient energy management strategy for TENGs, enabling ultrahigh voltage and power density outputs. By utilizing an auto-spark switch and standard design of matched transformer, this approach offers the possibility of continuous power supply for TENG in practical applications.
Review
Chemistry, Physical
Haobin Wang et al.
Summary: TENGs, as a new wearable technology that can convert low-frequency mechanical energy into electricity, have advantages in capturing human motion energy, driving wearable devices, and extracting output signal information. Wearable TENGs play important roles in the era of smart Internet of Things, mainly used in sensors, actuators, and human-machine interfaces. The technology has made progress in performance and process levels, with concrete prospects to further enter the market and serve the general public.
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Chemistry, Multidisciplinary
Hai Lu Wang et al.
Summary: In this study, a materials optimization strategy was proposed to improve the performance of triboelectric nanogenerators (TENGs) by optimizing the dielectric constant of a composite material, leading to a significant increase in output power and a decrease in matching impedance. This advancement demonstrates progress towards the practical commercialization of TENGs.
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Chemistry, Physical
Jihoon Chung et al.
Summary: TENG is a new type of generator that can collect mechanical energy, and the dielectric liquid-based self-operating switch triboelectric nanogenerator has a higher power generation efficiency, which can overcome the current limitation of air breakdown.
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Da Zhao et al.
Summary: The universal equivalent circuit model of triboelectric nanogenerators (TENGs) is a crucial tool in the field of energy harvesting and self-powered sensing, providing theoretical guidance for high-performance supply and grid-connected power generation applications. The model establishes electrical standards for the internal circuit of the TENG and demonstrates distinct output characteristics such as constant current, maximum power, and constant voltage regions. Experiments verify that the TENG can be considered a current source with a resistance of mega-ohms and a capacitance of nano-farads.
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Jianlong Wang et al.
Summary: This study presents a method to enhance the output performance of triboelectric nanogenerators (TENGs) using charge clamping, and demonstrates an integrated device based on CC-TENG for wind energy capture.
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(2021)
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Haitao Wang et al.
Summary: An improved EF-TENG with breathable-antibacterial electrode and electrostatic induction enhancement layer was proposed, and a high-performance all-fibrous materials-based triboelectric nanogenerator (AF-TENG) was successfully fabricated and investigated. The AF-TENG achieved a high output voltage of 200 V and current density of 70 mA/m2 within a work area of 90 mm2, and demonstrated excellent performance as a force detective sensor integrated with normal fabrics.
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Jia-Han Zhang et al.
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