A constant-current generator <i>via</i> water droplets driving Schottky diodes without a rectifying circuit

Li, Yahui; Zhang, Qi; Cao, Yuhong; Kang, Zhipeng; Ren, Han; Hu, Zhiyuan; Gao, Mang; Ma, Xiaole; Yao, Jinyuan; Wang, Yan; Zhang, Congchun; Ding, Guifu; Liu, Junshan; Bao, Jiming; Wang, Hui; Yang, Zhuoqing

doi:10.1039/d3ee02280c

Cited by 7 publications

(3 citation statements)

References 43 publications

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“…Moreover, AC-type DNG would inevitably encounter issues such as phase asynchronization and complex cable connection. To overcome these limitations, scientists have been seeking to develop DC-type DNG, and some breakthroughs have been made in the past three years. − ,, These works include the total-current DNG (TC-DNG) proposed by Dong, Song, and co-workers , and the DNG based on Schottky junction introduced by Yang and co-workers in 2023 . In particular, the TC-DNG by Dong et al is the first DC-type DNG ever reported .…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28]50,51 These works include the total-current DNG (TC-DNG) proposed by Dong, Song, and co-workers 26,27 and the DNG based on Schottky junction introduced by Yang and co-workers in 2023. 28 In particular, the TC-DNG by Dong et al is the first DC-type DNG ever reported. 26 It is based on a paradigm-shifting mechanism which utilizes the total-current of both displacement current and conduction current as the driving forces to generate DC output, and this unique concept has indeed paved a new theoretical path for further development of DNG.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Discovering effective ways to harvest these types of water energies not only contributes to the sustainable development of our society but also meets the substantial demand for distributed energy in the era of the Internet of Things (IoT) . Since its inception in 2006, nanogenerators, including piezoelectric nanogenerator (PENG), triboelectric nanogenerator (TENG), − and droplet-based nanogenerator (DNG), − have evolved into appealing devices for harvesting distributed energy. Among these nanogenerators, DNG undoubtedly stands out as a unique water energy harvesting technology.…”

Section: Introductionmentioning

confidence: 99%

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Droplet Energy Harvesting System Based on Total-Current Nanogenerator

Li,

Ma,

et al. 2024

ACS Appl. Mater. Interfaces

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The droplet-based nanogenerator (DNG) is a highly promising technology for harvesting high-entropy water energy in the era of the Internet of Things. Yet, despite the exciting progress made in recent years, challenges have emerged unexpectedly for the AC-type DNG-based energy system as it transitions from laboratory demonstrations to real-world applications. In this work, we propose a highperformance DNG system based on the total-current nanogenerator concept to address these challenges. This system utilizes the watercharge-shuttle architecture for easy scale-up, employs the field effect to boost charge density of the triboelectric layer, adopts an on-solar-panel design to improve compatibility with solar energy, and is equipped with a novel DC−DC buck converter as power management circuit. These features allow the proposed system to overcome the existing bottlenecks of DNG and empower the system with superior performances compared with previous ones. Notably, with the core architecture measuring only 15 cm × 12.5 cm × 0.3 cm in physical dimensions, this system reaches a record-high open-circuit voltage of 4200 V, capable of illuminating 1440 LEDs, and can charge a 4.7 mF capacitor to 4.5 V in less than 24 min. In addition, the practical potential of the proposed DNG system is further demonstrated through a selfpowered, smart greenhouse application scenario. These demonstrations include the continuous operation of a thermohygrometer, the operation of a Bluetooth plant monitor, and the all-weather energy harvesting capability. This work will provide valuable inspiration and guidance for the systematic design of next-generation DNG to unlock the sustainable potential of distributed water energy for real-world applications.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Droplet Energy Harvesting System Based on Total-Current Nanogenerator

Li,

Ma,

et al. 2024

ACS Appl. Mater. Interfaces

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Achieving High‐Efficiency Wind Energy Harvesting Triboelectric Nanogenerator by Coupling Soft Contact, Charge Space Accumulation, and Charge Dissipation Design

Mu,

He,

Shan

et al. 2023

Adv Funct Materials

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To enhance the durability of a triboelectric nanogenerator (TENG), soft contact is an effective approach due to its flexible and elastic contact mode. However, soft contact is hard to obtain with a large charge density by triboelectrification, resulting in low power output. Herein, a novel blade soft contact TENG (BSC‐TENG), coupling flexible functional blades with shielded electrodes on the rotor, charge accumulation, and charge dissipation design on the stator, is proposed. Extra polishing blades and debris storage grooves are adopted in the BSC‐TENG to further ensure high durability. A remarkable charge density of 328 µC m−2 is achieved, setting a new record for soft contact TENGs. Besides, the output charge remains at 100% even after 200 000 cycles. The wind‐driven BSC‐TENG not only can power 3840 green LEDs and 80 parallel hygrothermometers but also can drive electronic devices for smart farms, establishing self‐powered sensing systems. This work provides a novel strategy for enhancing soft contact TENG output and durability.

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High‐Entropy Ceramics Enhanced Droplet Electricity Generator for Energy Harvesting and Bacterial Detection

Wang,

Wang

et al. 2024

Advanced Materials

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The droplet electricity generator (DEG) is a solid‐liquid triboelectric nanogenerator (TENG) with transistor‐inspired bulk effect, which is regarded as an effective strategy for raindrop energy harvesting. However, further enhancement of DEG output voltage is necessary to enable its widespread applications. In this work, high‐entropy ceramics are integrated into the design of DEG intermediate layer for the first time, achieving a high output voltage of 525 V. High‐entropy ceramics have colossal dielectric constant, which can help to reduce the triboelectric charge decay for DEG. Furthermore, we extensively analyze the effect of factors on DEG output performance when employing high‐entropy ceramics as the intermediate layer, and explore the underlying mechanisms and mathematical models. Lastly, the enhanced output voltage of DEG not only facilitates faster energy harvesting but also enables a novel method for rapid bacterial detection. This work successfully integrates high‐entropy ceramics into DEG design, significantly enhances the output voltage and offers a novel direction for DEG development.This article is protected by copyright. All rights reserved

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A constant-current generator via water droplets driving Schottky diodes without a rectifying circuit

Abstract: This work highlights the regulation of an MSM Schottky barrier by the triboelectric potential, as well as many potential applications arising from this mechanism, including energy harvesters, droplet logic circuits, and fluid signal monitoring.

Cited by 7 publications

References 43 publications

Droplet Energy Harvesting System Based on Total-Current Nanogenerator

Droplet Energy Harvesting System Based on Total-Current Nanogenerator

Achieving High‐Efficiency Wind Energy Harvesting Triboelectric Nanogenerator by Coupling Soft Contact, Charge Space Accumulation, and Charge Dissipation Design

High‐Entropy Ceramics Enhanced Droplet Electricity Generator for Energy Harvesting and Bacterial Detection

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