Sustainable and flexible hydrovoltaic power generator for wearable sensing electronics

Li, Lianhui; Hao, Mingming; Yang, Xianqing; Sun, Fuqin; Bai, Yuanyuan; Ding, Haiyan; Wang, Shuqi; Zhang, Ting

doi:10.1016/j.nanoen.2020.104663

Cited by 126 publications

(111 citation statements)

References 38 publications

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“…1c mark when the capillary front rise to E1, E2, and E3, respectively. It can be found that the voltage is merely generated between electrodes across the capillary front of the ethanol film, which is in sharp contrast to water evaporation induced voltage which occurs in each neighbouring electrodes within the water capillary region and increases with increasing distance from the bulk water 4,12,13 ( Supplementary Fig. 9).…”

Section: And 5)mentioning

confidence: 99%

“…The streaming potential, a classic electrokinetic phenomenon in which an electric voltage can be generated when an electrolyte is driven through a narrow channel under a pressure gradient 15,16 , plays an important role in previous experiments of evaporation induced electricity 3,4,[6][7][8][9][10][11][12][13][14] . The dashed lines in Fig.…”

Section: And 5)mentioning

confidence: 99%

“…Harvesting energy from liquid evaporation has significant potential for green energy owing to the ubiquity of evaporation 1,2,5 . Evaporation has been widely used to drive microfluidic flow within porous films to generate electric power 3,4,[6][7][8][9][10][11][12][13][14] mainly based on the classic streaming potential effect 15,16 . However, the interactions between materials and evaporating molecules have been rarely investigated.…”

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Evaporating Potential

Fang

et al. 2020

Preprint

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Evaporation induced electric potential in functional materials has been promoting the emergence of a new discipline, hydrovoltaics1,2, but the phenomena have been widely ascribed to streaming potential related classic electrokinetic effects3,4. Here we show that evaporation in ambient environment can directly generate a sustainable voltage of up to 1 V with a current density of around 20 nA cm-2 from a porous carbon black film without contribution from streaming potential. Multi-electrode measurements confirm that the evaporating potential is generated mainly within the precursor ahead of the main capillary front. Detailed theoretical and experimental analyses indicate that the evaporating potential following the quadratic distribution arises from molecule evaporation induced carrier transfer in the precursor film. This new finding should lay a solid foundation for the emerging hydrovoltaics.

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Section: And 5)mentioning

confidence: 99%

Section: And 5)mentioning

confidence: 99%

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confidence: 99%

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Evaporating Potential

Fang

et al. 2020

Preprint

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Research progress of power generation device drivenby water evaporation

Niu¹,

Li²

2020

Chin. Sci. Bull.

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Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

Guo

Xiao

Gao

et al. 2021

Adv Funct Materials

134

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Electronic skin (e‐skin) is driving significant advances in flexible electronics as it holds great promise in health monitoring, human–machine interfaces, soft robotics, and so on. Flexible sensors that can detect various stimuli or have multiple properties play an indispensable role in e‐skin. Despite tremendous research efforts devoted to flexible sensors with excellent performance regarding a certain sensing mode or property, emerging e‐skin demands multifunctional flexible sensors to be endowed with the skin‐like capability and beyond. Considering outstanding superiorities of electrical conductivity, chemical stability, and ease of functionalization, carbon materials are adopted to implement multifunctional flexible sensors. In this review, the latest advances of carbon‐based multifunctional flexible sensors with regard to the types of detection modes and abundant properties are introduced. The corresponding preparation process, device structure, sensing mechanism, obtained performance, and intriguing applications are highlighted. Furthermore, diverse e‐skin systems by integrating current cutting‐edge technologies (e.g., data acquisition and transmission, neuromorphic technology, and artificial intelligence) with carbon‐based multifunctional flexible sensors are systematically investigated in detail. Finally, the existing problems and future developing directions are also proposed.

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Sustainable and flexible hydrovoltaic power generator for wearable sensing electronics

Cited by 126 publications

References 38 publications

Evaporating Potential

Evaporating Potential

Research progress of power generation device drivenby water evaporation

Recent Advances in Carbon Material‐Based Multifunctional Sensors and Their Applications in Electronic Skin Systems

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