Condensed droplet-based electricity generation via water-phase change

Shin, Gunsub; Yong, Hyungseok; Chung, Jihoon; Cho, Eunho; Ju, Jonghyun; Lin, Zong‐Hong; Kim, Dongseob; Lee, Hyungsoon; Koo, Bonwook; Lee, Sang‐Min

doi:10.1016/j.nanoen.2020.105713

Cited by 18 publications

(15 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In striking contrast to conventional design limited by interfacial effect, such a process exhibits a signature of bulk effect, leading to an increase in electrical outputs by several orders of magnitude. In spite of the boosted output performance, the transient output of this droplet‐based electricity generator is in the format of pulse, and typically has a duration time of several milliseconds, which is susceptible to low average electrical output 27‐36 . Although the average electrical output can be improved by increasing the frequency of liquid droplet impinging through reducing the empty interval between two neighboring pulses, an undesirable situation arises when the droplet falling on the surface could not be shed away immediately.…”

Section: Introductionmentioning

confidence: 99%

Harvesting energy from high‐frequency impinging water droplets by a droplet‐based electricity generator

Wang

Song

et al. 2021

EcoMat

View full text Add to dashboard Cite

Harvesting energy from water, in the form of raindrops, river, and ocean waves, is of considerable importance and has potential applications in self‐powered electronic devices and large‐scale energy needs. Recently, the droplet‐based electricity generator has shown an increase by several orders of magnitude in electrical output, overcoming the drawback of traditional droplet‐based device limited by interfacial effects. Despite this exciting result, the output performance of this novel droplet‐based electricity generator is limited by relatively low frequency of impinging droplets owing to the formation of a continuous liquid film at high impact frequency, which might hinder its practical applications. To overcome this challenge, here, we report the design of a superhydrophobic surface based droplet electricity generator, referred to as SHS‐DEG, which can timely shed water droplets from the surface without the formation of liquid film at high impact frequency, and thereby generating enhanced average electrical output. Moreover, our SHS‐DEG exhibits many distinctive advantages over conventional design including robustness, long‐term durability, and power generation stability even in harsh environments. We envision that the ability to harvest electrical energy from water droplets at high impact frequency has promising applications in various energy‐harvesting systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Harvesting energy from high‐frequency impinging water droplets by a droplet‐based electricity generator

Wang

Song

et al. 2021

EcoMat

View full text Add to dashboard Cite

show abstract

“…In this proposed mechanism, there is no need for any further requirement for the droplet as any single steady-state droplet can be harvested in this way which is an amazing flexibility for energy harvesting from water droplets. Furthermore, many effective structures with different mechanisms have been reported for droplets-based nanogenerators such as biodegradable leaves-based structure, [92] the interaction of the liquid droplet with liquid membrane, [93] two superhydrophobic surfaces in sandwiched structured nanogenerator, [94] impinging water droplets harvesting nanogenerator, [95] charge trapping-based nanogenerator, [96] capillary infiltrating approach, [97,98] self-propelled droplet-based harvesting, [99] moving ionic liquid droplet-based nanogenerator, [38] condensed droplets-based nanogenerator, [100] rose petal-based structured, [101] superhydrophobic cellular-paper-based structured, [102] through the microporous membrane, [103] ion specificity by flowing water droplets process, [104] and so on. [12,20,105] Addressing the use of chemical compounds in daily life is a constant challenge since the beginning of the scientific revolution.…”

Section: Miscellaneous Structure Of Droplet-based Nanogeneratorsmentioning

confidence: 99%

“…For the first time, Shin et al have fabricated a CDEG that utilizes different phases of water for harvesting energy. [100] The multiple stages of different phases lead to several outputs which have been achieved in consequences during the condensing steps including the nucleation, growth, shedding, sweeping, separation, and drop-off. Besides, their relationship among outputs, heat flux, and rate of condensation has been identified to study the underlying electricity-generating mechanism in every stage.…”

Section: Performances Of Miscellaneous-structured Nanogeneratorsmentioning

confidence: 99%

See 1 more Smart Citation

Water Droplet‐Based Nanogenerators

Hasan

Zhang

et al. 2022

Advanced Energy Materials

View full text Add to dashboard Cite

Water is one of the most sustainable resources in the world, offering an abundance of hydro energy. Getting a large amount of electricity through conventional water energy harvesting is expensive, with complex mechanisms and bulky installation systems. In the case of the small amount of energy for some portable electronic devices and sensor systems, water droplet harvesting as a sustainable energy resource has become a forward‐looking step to meet the future demand for green energy. The ultimate demand for green energy in the future requires all the possible sustainable energy sources surrounding human society. The emerging potential of water droplet‐driven energy‐harvesting nanogenerators can meet a significant portion of the green energy demand. In this review, the recent developments in droplets‐driven nanogenerators for effective energy scavenging is summarized. It also includes an extensive discussion about the device structures from the material selection and output performance aspects. This review also gives a brief discussion on the applications of droplet‐based nanogenerators and outlines the future possibilities via the current improvement in designs and fabrication strategies that have been introduced by the field.

show abstract

“…Traditionally, droplets can be fabricated by nozzles, small holes, and agitators in industrial production. In contrast to continuous liquid, dispersed droplets have larger surface areas under the same volume, and thus droplets can accelerate the speed of both physical and chemical reactions at the interface, including heat exchange [3][4][5], extraction, and redox reaction [6,7]. For example, in a diesel engine, diesel oil is atomized into droplets through the nozzle and fully mixed with the air to ensure full combustion [8].…”

Section: Introductionmentioning

confidence: 99%

Responsive Liquid Metal Droplets: From Bulk to Nano

et al. 2022

View full text Add to dashboard Cite

Droplets exist widely in nature and play an extremely important role in a broad variety of industrial processes. Typical droplets, including water and oil droplets, have received extensive attention and research, however their single properties still cannot meet diverse needs. Fortunately, liquid metal droplets emerging in recent years possess outstanding properties, including large surface tension, excellent electrical and thermal conductivity, convenient chemical processing, easy transition between liquid and solid phase state, and large-scale deformability, etc. More interestingly, liquid metal droplets with unique features can respond to external factors, including the electronic field, magnetic field, acoustic field, chemical field, temperature, and light, exhibiting extraordinary intelligent response characteristics. Their development over the past decade has brought substantial breakthroughs and progress. To better promote the advancement of this field, the present article is devoted to systematically summarizing and analyzing the recent fundamental progress of responsive liquid metal droplets, not only involving droplet characteristics and preparation methods, but also focusing on their diverse response behaviors and mechanisms. On this basis, the challenges and prospects related to the following development of liquid metal droplets are also proposed. In the future, responsive liquid metal droplets with a rapid development trend are expected to play a key role in soft robots, biomedicine, smart matter, and a variety of other fields.

show abstract

Condensed droplet-based electricity generation via water-phase change

Cited by 18 publications

References 20 publications

Harvesting energy from high‐frequency impinging water droplets by a droplet‐based electricity generator

Harvesting energy from high‐frequency impinging water droplets by a droplet‐based electricity generator

Water Droplet‐Based Nanogenerators

Responsive Liquid Metal Droplets: From Bulk to Nano

Contact Info

Product

Resources

About