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 .

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...

Energy management strategy is the essential approach for achieving high energy utilization efficiency of triboelectric nanogenerators (TENGs) due to their ultra-high intrinsic impedance. However, proven in practical applications remains low, and output regulation functionality still lacking. Herein, we propose a detailed transfer extraction mechanism addressing voltage charge losses caused by crucial switches circuits. The conversion increased 8.5 times through synergistical optimization...

Recently, utilizing the air breakdown effect in charge excitation strategy proves as an efficient injection technique to increase surface density of dielectric polymers for triboelectric nanogenerators (TENGs). However, quantitative characterization ability trap reverse charges and on startup time secondary self-charge (SSCE) are essential extensive applications. Here, ultra-fast self-injection based a is proposed, standard method quantify trapping de-trapping abilities 23 traditional...

A new type of sliding-TENG with asymmetric electrode design achieves high output performance and ultra-stability by the balance electrostatic shielding charge accumulation for providing power supply to some electrical devices.

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 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 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...

Triboelectric nanogenerator (TENG) is regarded as an effective strategy to convert environment mechanical energy into electricity meet the distributed demand of large number sensors in Internet Things (IoTs). Although TENG based on coupling triboelectrification and air-breakdown achieves a direct current (DC) output, material abrasion bottleneck for its applications. Here, inspired by primary cell DC signal output characteristics, we propose novel structure (PC-TENG) contact electrification...

Triboelectric nanogenerator (TENG) is a promising strategy for harvesting low frequency mechanical energy. However, the bottlenecks of limited electric output by air/dielectric breakdown and poor durability material abrasion seriously restrict its further improvement. Herein, we propose liquid lubrication promoted sliding mode TENG to address both issues. Liquid greatly reduces interface abrasion, high strength charge transmission effect enhance device density. Besides, potential...

Abstract The high surface charge density of triboelectric dielectric materials is the core output performance nanogenerators (TENGs). However, increase in enabled by existing material modification still far from saturation value (σ BS ) limited air breakdown. Here, utilizing directional electric field generated excitation technology voltage‐multiplying circuit, an ultrafast self‐injection strategy proposed. An ordinary contact‐separation TENG with a working frequency 1.5 Hz can realize on...

A novel strategy is proposed for capturing energy lost within the tribo-layer by rationally arranging charge-collecting electrodes, achieving highest output charge density (10.06 mC m −2 ) among various types of TENGs.

Abstract Triboelectric–electromagnetic hybridized nanogenerator (TEHG) is confirmed as an effective energy harvesting for Internet of Things. However, it still a great challenge to gain high‐output triboelectric‐nanogenerator (TENG) and perfectly combine TENG with electromagnetic generator (EMG). Herein, TEHG composed space confined multi‐layer‐stack (SM‐TENG) stack compression promoted flux change EMG proposed. The interaction magnets on the rotor stator makes contact–separation SM‐TENG...

Abstract Currently, the research on improving charge density of charge‐excitation triboelectric nanogenerators (CE‐TENG) mainly focuses surface modification and thinning organic polymer materials. However, to increase durability output, exploration high permittivity high‐thickness inorganic materials is important for extensive applications. Meanwhile, physical mechanism air ionization caused by breakdown during secondary self‐charge excitation (SSCE) needs be explored. Herein, this study...

An inventive semiconductor-free design of insulator-based quasi-TVNG (I-Q-TVNG) ingeniously utilizes the rich tribo-charges on insulator to construct strong tribo-bias attain remarkable performance in voltage, power, stability, and durability.

This work utilizes the UHCSI strategy to quantify ability of 30 conventional tribo-materials trap and de-trap positive/negative charges reveal that polymer's group composition influences states.

This paper summarizes the experimental results from a comprehensive research program to study fundamental stress-strain behavior of concrete confined by various types fiber reinforced polymer (FRP) composite jackets. More than 200 stub columns with 9 FRP jackets were tested under axial compression. The impact different design parameters including plain unconfined strength, composites as well jacket thickness considered in this study. strength enhancement and ductility improvement specimens...

Abstract Triboelectric nanogenerator (TENG), which converts mechanical energy into electrical energy, has become a promising environment harvesting technology. However, traditional TENG, based on the coupling of contact electrification and electrostatic induction, generates alternating current (AC) directly, requires rectifier to obtain direct (DC) before being used drive electronics. There are few methods DC output including rectifier, phase coupling, air breakdown, Schottky contact. But...