Fully printed planar moisture-enabled electric generator arrays for scalable function integration

He, Tiancheng; Wang, Haiyan; Lü, Bing; Guang, Tianlei; Yang, Ce; Huang, Yaxin; Cheng, Huhu; Qu, Liangti

doi:10.1016/j.joule.2023.04.007

Cited by 43 publications

(17 citation statements)

References 45 publications

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“…Second, the exceptional hygroscopicity of LiCl enables the composite film to further efficiently absorb moisture from the atmosphere and precisely regulate its water absorption ability. ,, This results in a multitude of wrinkle structures that significantly increase the area of interaction with the PTFE film during contact. Third, the introduction of two-dimensional MXene nanosheets simultaneously promotes cross-linking of PVA and the formation of microcapacitor networks in the composite film. , The layered structure amplifies the number of active sites and microcapacitor networks of the sheet resulting in an elevated charge storage capacity and ultimately contributing to heightened outputs of TENG. , Ambient humidity can induce a gradient distribution of mobile hydrogen ions (H) within carbon (C) materials containing oxygen-functional groups, and the concentration gradient drives H migration to generate electrical signals. − This innovative approach improves the electrical conductivity and ion transport efficiency, resulting in enhanced output performance and a linear fit degree with humidity for TENGs. These curve fittings serve as a strong foundation and can pave the way for future curve fittings of PL4M-TENGs functioning as power sources under high humidity conditions.…”

Section: Resultsmentioning

confidence: 99%

Self-Powered TENG with High Humidity Sensitivity from PVA Film Modified by LiCl and MXene

Wang,

Xia,

Yao

et al. 2023

ACS Appl. Mater. Interfaces

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Triboelectric nanogenerators (TENGs) are promising for a variety of applications that require a reliable output performance and stability. In this work, by utilizing the synergistic effect of lithium chloride (LiCl) and MXene, poly(vinyl alcohol) (PVA) based composite films with humidity-sensitive properties were prepared and employed as a friction layer to achieve selfpowered TENGs with enhanced output performance under high humidity. The composite material demonstrates exceptional and stable output performance in the humidity range of 30−95% while exhibiting a strong linear correlation with increasing relative humidity (RH). At 95% RH, its short-circuit current increases up to 31.91 μA, which is three times the output of the TENG fabricated by PVA and PTFE (P-TENG). The rich hydroxyl group in PVA, the strong hygroscopicity of LiCl, and the microcapacitor network provided by MXene nanosheets significantly improve the water absorption capacity and surface roughness of the composite material, resulting in an excellent triboelectric output of TENG. Short-circuit current of the TENG in a wide range of RH (from 50% to 98%) responds very sensitively to humidity fluctuations in the environment and superior adsorption−desorption performance as humidity decreases. Furthermore, TENG regarded as a power supply in high humidity conditions was realized and it can light up 240 LEDs instantaneously with the transfer charge density of TENG reaching 194.37 μC m −2 . This technology presents an effective method for stable energy harvesting and self-powered sensing in fog, the ocean, and other high-humidity environments.

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Section: Resultsmentioning

confidence: 99%

Self-Powered TENG with High Humidity Sensitivity from PVA Film Modified by LiCl and MXene

Wang,

Xia,

Yao

et al. 2023

ACS Appl. Mater. Interfaces

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“…Humidity is a ubiquitous source of stimulation in the environment, storing a tremendous amount of chemical potential that is difficult to utilize. [59][60][61] Traditional humidity actuators can only deform when driven by humidity, converting humidity energy into mechanical energy. [62][63][64] Hydroelectric generators are generally multilayer structures, similar to actuators.…”

Section: Hydroelectric Effectmentioning

confidence: 99%

Soft multi‐layer actuators integrated with the functions of electrical energy harvest and storage

Feng,

Zhou,

Peng

et al. 2024

Chemistry A European J

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Soft multi‐layer actuators are smart, lightweight, and flexible, which can be used in a wide range of fields such as artificial muscles, advanced medical devices, and wearable devices. The research on the actuation property of the soft actuators has made significant progress, paving the way for the controllable motions of the actuators. However, compared with the intelligence and adaptability of life in nature, these actuators still have the problem of insufficient intelligence. The phenomenon is reflected in a lack of continuous supply of energy. Therefore, it has become a development trend to combine functions such as energy harvesting, storage, and conversion with actuators to build intelligent actuators. This concept presents a synopsis of the advancements made in soft actuators that have been coupled with the capabilities of electrical energy harvesting and storage. The design concepts and typical applications of this soft smart actuators are introduced in detail. Finally, the future research directions and applications of smart actuators are prospected from our perspective.

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“…Such an integrated HMEG device easily drove a dynamic electronic ink screen (Figure i). In a follow-up study, his team developed an integrated functional system based on this experiment including an electrical energy generation module, an energy storage supercapacitor, and an electrochromic device . In summary, these studies provided a practical approach for green and sustainable power harvesting and conversion.…”

Section: Electricity Generation From Moisture–solid Interfacesmentioning

confidence: 99%

Advances and Challenges for Hydrovoltaic Intelligence

2023

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In recent years, excessive exploitation and rapid population growth have posed numerous challenges. The climate crisis is deepening because of the unabated use of fossil fuels and the ascendance of greenhouse gas levels, so there is still an urgent need to seek different clean energy sources and electricity generating methods with the purpose of adjusting energy structures and solving environmental problems. In the ubiquitous hydrologic cycle, at least 60 petawatts (1015 W) energy can be supplied, but little of it has yet been utilized. Nowadays, hydrovoltaic intelligence has emerged and exhibited an ecofriendly concept of electricity generation compared with traditional methods with the rise of nanoscience and nanomaterials. Hence, it provides the prospect of upgrading the mode of water energy use, constructing a renewable energy industry, and alleviating environmental issues. In this review, starting by introducing different types of hydrovoltaic effect mechanismsenergy harvesting based on drawing potential of liquids; energy harvesting based on water evaporation, and energy harvesting based on moisture adsorptionwe summarize the fabrication processes, material classifications, intelligent applications, and representative advances in detail. Moreover, the future development trends of hydrovoltaic intelligence and the challenges for improvement in electrical output are further discussed.

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Fully printed planar moisture-enabled electric generator arrays for scalable function integration

Cited by 43 publications

References 45 publications

Self-Powered TENG with High Humidity Sensitivity from PVA Film Modified by LiCl and MXene

Self-Powered TENG with High Humidity Sensitivity from PVA Film Modified by LiCl and MXene

Soft multi‐layer actuators integrated with the functions of electrical energy harvest and storage

Advances and Challenges for Hydrovoltaic Intelligence

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