Surface charge density is the key factor for developing high performance triboelectric nanogenerators (TENG). The previously invented excitation TENG provides a most efficient way to achieve maximum output of device. Herein, criteria quantitatively evaluate contact efficiency and air breakdown model on are established enhance density. theoretical results further verified by systematic experiments. A average up 2.38 mC m

Abstract Non-contact triboelectric nanogenerator (TENG) enabled for both high conversion efficiency and durability is appropriate to harvest random micro energy owing the advantage of low driving force. However, output (<10 μC m −2 ) non-contact TENG caused by drastic charge decay limits its application. Here, we propose a floating self-excited sliding (FSS-TENG) amplification between rotator stator achieve self-increased density, air breakdown model given maximum density. The density up...

The sliding mode triboelectric nanogenerator (S-TENG) is an effective technology for in-plane low-frequency mechanical energy harvesting. However, as surface modification of tribo-materials and charge excitation strategies are not well applicable this mode, output performance promotion S-TENG has no breakthrough recently. Herein, we propose a new strategy by designing shielding layer alternative blank-tribo-area enabled space-accumulation (CSA) enormously improving the density S-TENG. It...

Abstract Owing to the advantages of integration and being magnet-free light-weight, switched-capacitor-convertor plays an increasing role compared traditional transformer in some specific power supply systems. However, high output impedance switching loss largely reduces its efficiency, due imperfect topology transistors. Herein, we propose a fractal-design based switched-capacitor-convertors with characteristics including conversion minimum impedance, electrostatic voltage applicability. As...

The triboelectric nanogenerator (TENG) is an emerging technology for ambient mechanical energy harvesting, which provides a possibility to realize wild environment monitoring by self-powered sensing systems. However, TENGs are limited in some practical applications as result of their low output performance (low charge density) and durability (material abrasion). Herein, ultrarobust high-performance rotational TENG enabled automatic mode switching (contact at speed noncontact high speed)...

In human-machine interaction, robotic hands are useful in many scenarios. To operate via gestures instead of handles will greatly improve the convenience and intuition interaction. Here, we present a magnetic array assisted sliding triboelectric sensor for achieving real-time gesture interaction between human hand hand. With finger's traction movement flexion or extension, can induce positive/negative pulse signals. Through counting pulses unit time, degree, speed, direction finger motion be...

Improving the output energy and durability of triboelectric nanogenerators (TENGs) remains a considerable challenge for their practical applications. Owing to interface effect triboelectrification electrostatic induction, thinner films with higher dielectric constants yield output; however, they are not durable Herein, surface is changed into volume by adopting millimeter-thick film an inner porous network structure so that charges can hop in state network. Charge migration inside key factor...

Boosting output charge density is top priority for achieving high-performance triboelectric nanogenerators (TENGs). The charge-excitation strategy demonstrated to be a superior approach acquire high density. Meanwhile, the molecular behaviors in dielectric under strong electric field from bring new physics that are worth exploring. Here, rapid self-polarization effect of polar material by superhigh TENG reported, which permittivity realizes self-increase saturation, and thus enhances...

To enhance the durability of triboelectric nanogenerator (TENG), liquid lubrication has been used to reduce mechanical abrasion. However, as charge transportation behavior in dielectric is not clearly understood, output energy still low although some improvements have reported. Herein, behaviors by self-excited suspension (LS-TENG) are systematically investigated. The important role solid-liquid triboelectrification effect, charge-liquid transmission and dissipation homogeneous induction...

Abstract Triboelectric nanogenerators (TENGs) are regarded as a promising technology to convert ambient low‐frequency mechanical energy into electricity for distributed power supply. Although TENGs based on triboelectrification (TE) of metal–dielectric and air breakdown have the advantage direct current (DC) output, unidirectional single‐channel output mode limits their utilization efficiency. Here, bidirectional double‐channel (BDC‐TENG) TE dielectric–dielectric local corona discharge is...

The charge trapping failure effect ensures that the actual output efficiency of a excitation-triboelectric nanogenerator (CE-TENG) reaches 100%, and thus achieves record-high density 4.13 mC m −2 .

By coupling the charge leakage effect and ternary dielectric triboelectrification effect, our work improves overall performance of DC-TENGs creates new records in average power density, peak factor output density.

Abstract As the most extensive natural energy on earth, ocean wave is regarded as a difficult to be fully and efficiently utilized because of its low frequency multi‐direction movement. Herein, versatile blue triboelectric nanogenerator (VBE‐TENG) fabricated by using dual‐mode output terminals with charge excitation strategy reported, which can harvest varying water‐wave effectively. Benefiting from rolling ball specific track compression rebound characteristics spring sheet steel, carrier...

Abstract Although high permittivity of inorganic materials (possibly two orders larger than organic polymers) is theoretically considered as ideal triboelectric materials, their leakage property and low contact potential difference with metal electrodes lead to failure obtain charge density. Besides, the internal space accumulation a result defect levels reduces output density causes dielectric loss or even breakdown under injection in charge‐excitation nanogenerator (CE‐TENG). Herein, this...

Abstract The newly invented triboelectric nanogenerator (TENG) is deemed to be a more efficient strategy than an electromagnetic generator (EMG) in harvesting low‐frequency (<2 Hz) water wave energy. Various TENGs with different structures and functions for blue energy have been developed, which can roughly divided into two types: liquid–solid contact electrification fully enclosed solid–solid TENGs. Robustness packaging are critical factors the development of toward practical...

An inverting TENG realizes the AC mode based on triboelectrification and air-breakdown by setting alternating polarity distribution areas, exhibits unique feature in that both width ratio amplitude of signals can be tuned.

We proposed a universal design strategy of matched inductor for TENG with parameters studied from both theory and experiments systematically. The results show giant performance improvement system.

Abstract Although charge excitation is an effective approach to achieve high density for triboelectric nanogenerators (TENGs), output limited by air‐breakdown. Due capacitor structure, there are two ways reduce the influence of air‐breakdown in TENG: decrease thickness and increase permittivity dielectric film. Obviously, more reliable applications. Herein, a double‐layer TENG shared with one floating metal electrode proposed, on which injected self‐excitation circuit. An ultrafast...

Abstract The charge space‐accumulation effect is one of most effective strategies to boost output performance the sliding mode triboelectric nanogenerator (TENG) with AC output, by which shielding layer greatly prevents air breakdown on interface and blank triboarea dissipation its surface promotes accumulation. However, speed depends properties materials these charges are lost in air. Herein, a novel strategy proposed capture space accumulation area for further enhancing TENG. DC electrodes...

Abstract Utilizing the static friction of rolling rod/ball is an effective strategy to address mechanical durability in sliding mode triboelectric nanogenerators (TENGs), but its line/point contact seriously reduces output performance. Herein, a high and ultra‐durable TENG achieved by belt method. Compared with previous rod (R‐TENG), electric performance (RB‐TENG) increases nearly 3.8 times. The maximum power density RB‐TENG reaches ≈ 280 W m ‐2 self‐charge excitation management, charge...

Abstract The modification of triboelectric materials is an important means to improve the output performance nanogenerator (TENG), and surface charge or ion implantation effective way among many methods. However, enhancement via optimizing still limited. Herein, a fast injection technique based on air breakdown effect reported, which utilizes excitation circuit realize directional accumulation charge. Consequently, density Polyimide (PI) film after reaches 880 µC m ‐2 , highest series...