A portable device for water-sloshing-based electricity generation based on charge separation and accumulation

Chung, Jihoon; Heo, Deokjae; Cha, Kyunghwan; Lin, Zong‐Hong; Hong, Jinkee; Lee, Sang‐Min

doi:10.1016/j.isci.2021.102442

Cited by 8 publications

(5 citation statements)

References 34 publications

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“…Based on the sloshing of the liquid in the cup, Chung et al developed a portable water-sloshing-based TENG. [143] Figure 13d demonstrates the composition of this device, which included a cylindrical PFA shell, with four electrodes covering the shell and a center electrode hanging on the top of the cup. The charge accumulation in water, induced by its contact with the PFA shell during cup sloshing, produces a transient high voltage when the water contacts the center electrode.…”

Section: Wave-driven Liquid-solid Tengmentioning

confidence: 99%

“…[ 127] Flowing water PTFE Single-electrode mode 45 μW Munirathinam et al [ 131] FEP Freestanding mode 27.6 μW Zhang et al [ 63] PTFE (Ti-mesh) Single-electrode mode 4.48 μW Park et al [ 133] PTFE Freestanding mode 19.1 μW Kim et al [ 134] Waves PTFE Freestanding mode 0.98 mW Li et al [ 137] PTFE Freestanding mode 1.03 mW Zhao et al [ 139] FEP Single-electrode mode 101.5 μW X u e t a l . [ 140] PFA Freestanding mode 2.68 mW Chung et al [ 143] TENG connects the water and electrodes in closed loops through the center electrode, ultimately generating an instantaneous output. However, the instability of the movement of the cup poses a challenge to the output stability of TENG, limiting its practical application.…”

Section: Wave-driven Liquid-solid Tengmentioning

confidence: 99%

See 1 more Smart Citation

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

Cheng,

Zhang,

et al. 2024

Adv Materials Technologies

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As the increasing scarcity of fossil fuels and the ever‐present need to address environmental concerns are faced, the development of efficient and sustainable energy harvesting techniques gains more and more significance. The liquid–solid triboelectric nanogenerator (TENG) has emerged as a promising solution for harvesting mechanical energy in water. Although the liquid–solid contact electrification technique is studied by numerous researchers, there is still a need to enhance energy harvesting efficiency in liquid–solid TENG. This comprehensive review discusses recent advances in kinetic energy harvesting from water, focusing on the solid–solid and liquid–solid interaction mechanisms when using TENGs as an energy conversion medium. The review summarizes the recent developments in structure design and material improvements, as well as hybridization with other generators as methods of enhancing the output performance of TENG. Besides discussing advancements of TENG, the potential impact and future challenges of liquid–solid TENG are highlighted. This paper provides insight into the current state of knowledge and the future directions of research in the field of liquid–solid TENG energy harvesting.

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Section: Wave-driven Liquid-solid Tengmentioning

confidence: 99%

Section: Wave-driven Liquid-solid Tengmentioning

confidence: 99%

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

Cheng,

Zhang,

et al. 2024

Adv Materials Technologies

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“…However, it is susceptible to additional energy input and complicated processes, which hinders its broad applications. [27][28][29][30][31][32] Despite exciting progress, achieving ultrahigh instantaneous output with reduced charging time still remains challenging. This is because obtaining extraordinarily high instantaneous output necessitates high surface charge density, which inevitably involves a long charging time.…”

Section: Introductionmentioning

confidence: 99%

“…Different from charging from droplets through contact electrification, electrowetting allows for a shortened charging time and high surface charge density. However, it is susceptible to additional energy input and complicated processes, which hinders its broad applications 27–32 …”

Section: Introductionmentioning

confidence: 99%

A droplet‐based electricity generator with ultrahigh instantaneous output and short charging time

Zhang

et al. 2022

Droplet

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The past several years have witnessed the rapid development in effectively transforming randomly distributed water kinetic energy into electrical energy, especially triggered by the emergence of droplet‐based electricity generators (DEG). Despite this, it still suffers from relatively low average power density, which is also achieved at the cost of long charging time, the time to reach stable and saturated surface charge density either through continuous droplet impingement or precharging. Although the harvested energy per droplet in DEG remains as the dominant metric, ultrahigh instantaneous output and short charging time are equally important in some specialized applications such as instantaneous luminescence. Here, we conduct systematical modeling and optimization to build the link between the hydrodynamic and electrical systems, which enables us to determine ultrahigh instantaneous output and short charging time by tailoring parameters such as dielectric layer thickness, droplet ion concentration, and external load. We envision that this strategy in achieving ultrahigh instantaneous output as well as shortening charging time would provide insights and design routes for water energy harvesting.

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“…As portable/wearable electronic technology has rapidly developed and human lifestyle has moved toward the epoch of the Internet of Things, the issue of power supply to electronic devices has emerged [1,2]. Energy harvesting technol-ogy, which can offset energy consumption and complement equipped batteries, is considered a favorable solution for powering various portable/wearable devices with elongated operation durations [3][4][5]. Thus, various energy harvesting devices, such as electromagnetic generators [6,7], piezoelectric nanogenerators [8], and triboelectric nanogenerators (TENGs) [9][10][11], are being investigated by numerous research groups.…”

Section: Introductionmentioning

confidence: 99%

Toward Commercialization of Mechanical Energy Harvester: Reusable Triboelectric Nanogenerator Based on Closed-Loop Mass Production of Recyclable Thermoplastic Fluoropolymer with Microstructures

Ra,

Lee,

Bang

et al. 2023

International Journal of Energy Research

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Triboelectric nanogenerators (TENGs) have been considered a promising energy harvester. However, the wear-induced limited lifetime of the surface structure on fluoropolymeric contact layers of the TENG has been a critical issue in its commercialization because surface structures on soft engineering materials play a key role in enhancing the generation of electricity in TENGs. After the surface structure on the polymeric contact layer is worn out, the layer is required to be replaced with a new one with intact surface structures to reenhance the degraded output performance of the TENG. Herein, injection molding-assisted mass production is applied to manufacture micro/nanoscale surface-structured perfluoroalkoxy alkane (PFA) contact layers, which exhibit easily replaceable but fully recyclable characteristics. The optimized production time is shorter than 1 min, and the unit cost under $1 of manufacturing surface-structured PFA contact layers is achieved. TENG with the fabricated PFA contact layer can generate over 620 V of voltage and up to 12.4 mW of power from solid-solid contact and separation when the contact area is 5 cm × 5 cm and the contact frequency is 10 Hz. The manufactured PFA contact layer can be facilely replaced with a new one before the end of its lifetime to maintain the electrical output of the TENG, and the postused one can be fully recycled via reprocessing as the material for injection molding. Consequently, a tile-floor-based TENG is proposed as a proof-of-concept demonstration to show environmentally friendly and closed-loop production of TENGs.

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A portable device for water-sloshing-based electricity generation based on charge separation and accumulation

Abstract: HighlightsPortable electric generator using water sloshing motion is proposed Quantitative analysis for optimized water generator design was done Electrical power is generated through walking and running motion

Cited by 8 publications

References 34 publications

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

A Comprehensive Review of Advancements and Challenges from Solid–Solid to Liquid–Solid Triboelectric Nanogenerators

A droplet‐based electricity generator with ultrahigh instantaneous output and short charging time

Toward Commercialization of Mechanical Energy Harvester: Reusable Triboelectric Nanogenerator Based on Closed-Loop Mass Production of Recyclable Thermoplastic Fluoropolymer with Microstructures

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