A novel, flexible dual-mode power generator adapted for wide dynamic range of the aqueous salinity

Li, Lianhui; Gao, Shouwei; Hao, Mingming; Yang, Xianqing; Feng, Sijia; Li, Lili; Wang, Shuqi; Xiong, Zuoping; Sun, Fuqin; Li, Yue; Bai, Yuanyuan; Zhao, Yuelei; Wang, Zuankai; Zhang, Ting

doi:10.1016/j.nanoen.2021.105970

Cited by 53 publications

(65 citation statements)

References 48 publications

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Section: Discussionmentioning

confidence: 99%

“…To address this challenge, the evaporation‐induced generator is combined with a primary battery as a dual‐mode electricity generator (DM‐ENG), exhibiting stable performance even in high salinity conditions (Figure 10c). [ 220 ] In the porous carbon black/PVA film with wettability patterns, the sweat flows in the hydrophilic region to continuously generate a streaming potential, whereas the hydrophobic region that prevents the liquid transport forms a primary battery system. The decrease in streaming potential can be compensated by the primary battery system for the DM‐ENG to maintain stable performance in a wide range of ion concentrations across 10 orders of magnitude.…”

Section: Application Of Surface Wettability In Skin‐interfaced Sensor...mentioning

confidence: 99%

Section: Application Of Surface Wettability In Skin‐interfaced Sensor...mentioning

confidence: 99%

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Surface Wettability for Skin‐Interfaced Sensors and Devices

Wang

Liu

Cheng

et al. 2022

Adv Funct Materials

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The practical applications of skin-interfaced sensors and devices in daily life hinge on the rational design of surface wettability to maintain device integrity and achieve improved sensing performance under complex hydrated conditions. Various bioinspired strategies have been implemented to engineer desired surface wettability for varying hydrated conditions. Although the bodily fluids can negatively affect the device performance, they also provide a rich reservoir of health-relevant information and sustained energy for next-generation stretchable self-powered devices. As a result, the design and manipulation of the surface wettability are critical to effectively control the liquid behavior on the device surface for enhanced performance. The sensors and devices with engineered surface wettability can collect and analyze health biomarkers while being minimally affected by bodily fluids or ambient humid environments. The energy harvesters also benefit from surface wettability design to achieve enhanced performance for powering on-body electronics. This review first summarizes the commonly used approaches to tune the surface wettability for target applications toward skin-interfaced sensors and devices. By considering the existing challenges, one also discusses the opportunities as a small fraction of potential future developments, which can lead to a new class of skin-interfaced devices for use in digital health and personalized medicine.

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Section: Discussionmentioning

confidence: 99%

Section: Application Of Surface Wettability In Skin‐interfaced Sensor...mentioning

confidence: 99%

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Surface Wettability for Skin‐Interfaced Sensors and Devices

Wang

Liu

Cheng

et al. 2022

Adv Funct Materials

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“…Moreover, the ionovoltaic effect mechanism provided an important insight in verifying the origin of electrical energy generation via various water motions. [1][2][3][4][5][6][7][8][36][37][38][39][40][41]…”

Section: Mechanism Of Water-infiltration-induced Electricity Generationmentioning

confidence: 99%

Verification of Carrier Concentration‐Dependent Behavior in Water‐Infiltration‐Induced Electricity Generation by Ionovoltaic Effect

Jin

Park

Yoon

et al. 2021

Small

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Water‐infiltration‐induced power generation has the renewable characteristic of generating electrical energy from ambient water. Importantly, it is found that the carrier concentration in semiconductor constituting the energy generator seriously affect the electricity generation. Nevertheless, few studies are conducted on the influence of semiconductor carrier concentration, a crucial factor on electricity generation. Due to this, understanding of the energy harvesting mechanism is still insufficient. Herein, the semiconductor carrier concentration‐dependent behavior in water‐infiltration‐induced electricity generation and the energy harvesting mechanism by ionovoltaic effect are comprehensively verified. A clue to enhance the electric power generation efficiency is also proposed. When 20 µL of water (NaCl, 0.1 m) infiltrates into a porous CuO nanowires film (PCNF), electric power of ≈0.5 V and ≈1 µA are produced for 25 min. Moreover, the PCNF shows good practicability by generating electricity using various ambient water, turning on LEDs, and being fabricated as a curved one.

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“…However, it is still not clear how the ion current inside the device and the electronic current in the load resistance can be converted to each other. The traditional streaming potential usually relies on the oxidation-reduction reaction of the electrode to convert the ionic current into a continuous electronic current 39,40,43 . However, as mentioned before and shown in Fig.…”

Section: Analysis Of Mechanism and In Uence Factorsmentioning

confidence: 99%

Sustainable power generation for at least one month from ambient humidity using unique nanofluidic diode

Zhang

Yang

Shang

et al. 2021

Preprint

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The continuous energy-harvesting of humidity naturally present in air is attractive for the development of clean energy source for self-sustained systems. Controlling the transport of ionized mobile charge in intelligent nanoporous membrane systems is a promising strategy to convert ambient moisture energy to electricity. However, existing designs still suffer from low output power density. Moreover, these devices can only produce short-term (mostly a few seconds or a few hours, rarely for a few days) voltage and current output in the ambient environment. Effort devoted to pursuing membrane materials with new sustained energy conversion mechanism is urgently needed. Here, we design an ionic diode–type hybrid membrane with carbon nanotube/anodized aluminum asymmetric structure capable of continuously harvesting moisture energy in the ambient environment. Under electric fields, a hybrid membrane exhibits ionic current rectification properties, enabling high energy conversion efficiency in the long run due to steady-state one-way ion transport. Using a synergy between the ion rectification of nanofluidic diode and the built-in electric field induced ionization and charge transfer, one single unit produces a sustained maximum open-circuit-voltage, short-circuit-current, short-circuit-current density, output power density of 1.1V, 7.7µA, 11.3µAcm−2 and 1.3µWcm−2/277µWcm−3, respectively (93% RH, 25℃). Besides, the strong hydrogen bonds and van der Waals forces formed at the interface of asymmetric structure make the hybrid membrane robust in humid environment. In particular, the strategy of adjusting the moisture-based energy-harvesting performance based on the rectification effect of the nanofluidic diode is reported for the first time. Compared with the relevant existing devices, those elaborated by the present work show the longest service life and can generate continuous voltage and current for at least one month, demonstrating the feasibility of long-term power generation in any location with moisture conditions.

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A novel, flexible dual-mode power generator adapted for wide dynamic range of the aqueous salinity

Cited by 53 publications

References 48 publications

Surface Wettability for Skin‐Interfaced Sensors and Devices

Surface Wettability for Skin‐Interfaced Sensors and Devices

Verification of Carrier Concentration‐Dependent Behavior in Water‐Infiltration‐Induced Electricity Generation by Ionovoltaic Effect

Sustainable power generation for at least one month from ambient humidity using unique nanofluidic diode

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