Improved Output Performance of Triboelectric Nanogenerator by Fast Accumulation Process of Surface Charges

Li, Yanhong; Zhao, Zhihao; Liu, Lu; Zhou, Linglin; Liu, Di; Li, Shaoxin; Chen, Shengyang; Dai, Yejing; Wang, Jie; Wang, Zhong Lin

doi:10.1002/aenm.202100050

Cited by 84 publications

(82 citation statements)

References 33 publications

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“…Despite the TENGs based on absorbent materials generate more triboelectric charges in high humidity conditions, their surface charge densities are still relatively low due to the limitation of their intrinsic triboelectrification property. More recently, fast charge accumulation [33] and charge excitation strategy [34] are proposed to break through the limitation of triboelectrification, realizing a high charge density of ≈2.20 and 2.38 mC m −2 at 30% relative humidity (RH) and 5% RH, respectively. However, under high humidity state (e.g., 90%…”

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confidence: 99%

Achieving Ultrahigh Effective Surface Charge Density of Direct‐Current Triboelectric Nanogenerator in High Humidity

Liu

Zhao

et al. 2022

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As an emerging energy‐harvesting technology, the triboelectric nanogenerator (TENG) is considered a powerful driving force toward the new‐era of Internet of Things and artificial intelligence, but its output performance is dramatically influenced by environmental humidity. Herein, a direct current TENG (DC‐TENG) based on the triboelectrification effect and electrostatic breakdown is reported to address the problem of output attenuation in high humidity environments for the conventional TENGs. It is found that high humidity not only enhances the sliding triboelectrification effect of hydrophobic triboelectric materials, but also promotes the electrostatic breakdown process for DC‐TENG, thus contributing to the improvement of DC‐TENG output. Furthermore, taking poly(vinyl chloride) film as the friction layer, the effective surface charge density of DC‐TENG with microstructure‐designed electrode achieves a milestone value of ≈2.97 mC m−2 under 90% relative humidity, which is almost 1.42‐fold larger than that under 30% RH. This work not only establishes an effective methodology to boost the output performance of TENG in a high humidity environment, but also establishes a foundation for its practical applications in large‐scale energy harvesting.

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confidence: 99%

Achieving Ultrahigh Effective Surface Charge Density of Direct‐Current Triboelectric Nanogenerator in High Humidity

Liu

Zhao

et al. 2022

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“…8 and 9. In addition, the influence of the capacitance value in VMC on excitation charge is also tested 48 . To have a faster excitation speed, five small capacitances are chosen for comparison as shown in Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

High performance floating self-excited sliding triboelectric nanogenerator for micro mechanical energy harvesting

et al. 2021

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Non-contact triboelectric nanogenerator (TENG) enabled for both high conversion efficiency and durability is appropriate to harvest random micro energy owing to the advantage of low driving force. However, the low output (<10 μC m−2) of non-contact TENG caused by the drastic charge decay limits its application. Here, we propose a floating self-excited sliding TENG (FSS-TENG) by a self-excited amplification between rotator and stator to achieve self-increased charge density, and the air breakdown model of non-contact TENG is given for a maximum charge density. The charge density up to 71.53 μC m−2 is achieved, 5.46 times as that of the traditional floating TENG. Besides, the high output enables it to continuously power small electronics at 3 m s−1 weak wind. This work provides an effective strategy to address the low output of floating sliding TENG, and can be easily adapted to capture the varied micro mechanical energies anywhere.

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“…[3] Besides, harvesting the renewable environmental energy is also an important strategy in achieving the maximum charge density of 2.20 mC m −2 with a higher permittivity film in thickness of 9 µm by elevating the contact efficiency to 82%. [16] Besides, we also analyzed the air breakdown model of the CE-TENG based on Paschen's law, [15] which shows that charge excitation is also limited by air breakdown, and the maximum charge density of the TENG increases with the increase in the relative permittivity of the triboelectric material and with the decrease in the thickness of the dielectric film. However, if the thickness of dielectric film is further reduced, the dielectric film will be vulnerably damaged by stress and break down by high voltage, which is not useful for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Achieving Remarkable Charge Density via Self‐Polarization of Polar High‐k Material in a Charge‐Excitation Triboelectric Nanogenerator

Shan

et al. 2022

Advanced Materials

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Boosting output charge density is top priority for achieving high-performance triboelectric nanogenerators (TENGs). The charge-excitation strategy is demonstrated to be a superior approach to acquire high output charge density. Meanwhile, the molecular charge behaviors in the dielectric under a strong electric field from high charge density bring new physics that are worth exploring. Here, a rapid self-polarization effect of a polar dielectric material by the superhigh electric field in a charge-excitation TENG is reported, by which the permittivity of the polar dielectric material realizes self-increase to a saturation, and thus enhances the output charge density. Consequently, an ultrahigh charge density of 3.53 mC m −2 is obtained with 7 µm homemade lead zirconate titanate−poly(vinylidene fluoride) composite film in the atmosphere with 5% relative humidity, which is the highest charge density for TENGs with high durability currently. This work provides new guidance for dielectric material optimization under charge excitation to boost the output performance of TENGs toward practical applications.

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Improved Output Performance of Triboelectric Nanogenerator by Fast Accumulation Process of Surface Charges

Cited by 84 publications

References 33 publications

Achieving Ultrahigh Effective Surface Charge Density of Direct‐Current Triboelectric Nanogenerator in High Humidity

Achieving Ultrahigh Effective Surface Charge Density of Direct‐Current Triboelectric Nanogenerator in High Humidity

High performance floating self-excited sliding triboelectric nanogenerator for micro mechanical energy harvesting

Achieving Remarkable Charge Density via Self‐Polarization of Polar High‐k Material in a Charge‐Excitation Triboelectric Nanogenerator

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