A review of humidity gradient-based power generator: Devices, materials and mechanisms

Yan, Huping; Liu, Zhen; Qi, Ronghui

doi:10.1016/j.nanoen.2022.107591

Cited by 45 publications

(24 citation statements)

References 98 publications

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“…Generally, several principles of humidity measurement, such as impedance, capacitance, resistance, gravimetric (frequency), optics, fluorescence, and power generation/self-powered, utilize different kinds of conventional and novel materials, e.g., ceramics, polymers, and nanomaterials, as summarized in different reviews [2][3][4][5][6][7][8]. For example, impedimetric sensors comprise a substrate, an electrode, and a humidity-sensitive coating.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Sensitive and Fast Humidity Sensors Based on Direct Laser-Scribed Graphene Oxide/Carbon Nanotubes Composites

Al‐Hamry

Chen

et al. 2023

Nanomaterials

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In this paper, the relative humidity sensor properties of graphene oxide (GO) and graphene oxide/multiwalled nanotubes (GO/MWNTs) composites have been investigated. Composite sensors were fabricated by direct laser scribing and characterized using UV-vis-NIR, Raman, Fourier transform infrared, and X-ray photoemission spectroscopies, electron scanning microscopy coupled with energy-dispersive X-ray analysis, and impedance spectroscopy (IS). These methods confirm the composite homogeneity and laser reduction of GO/MWNT with dominant GO characteristics, while ISresults analysis reveals the circuit model for rGO-GO-rGO structure and the effect of MWNT on the sensor properties. Although direct laser scribing of GO-based humidity sensor shows an outstanding response (|ΔZ|/|Z| up to 638,800%), a lack of stability and repeatability has been observed. GO/MWNT-based humidity sensors are more conductive than GO sensors and relatively less sensitive (|ΔZ|/|Z| = 163,000%). However, they are more stable in harsh humid conditions, repeatable, and reproducible even after several years of shelf-life. In addition, they have fast response/recovery times of 10.7 s and 9.3 s and an ultra-fast response time of 61 ms when abrupt humidification/dehumidification is applied by respiration. All carbon-based sensors’ overall properties confirm the advantage of introducing the GO/MWNT hybrid and laser direct writing to produce stable structures and sensors.

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Section: Introductionmentioning

confidence: 99%

Ultra-Sensitive and Fast Humidity Sensors Based on Direct Laser-Scribed Graphene Oxide/Carbon Nanotubes Composites

Al‐Hamry

Chen

et al. 2023

Nanomaterials

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“…Humidity sensor is an important and widely used signal data acquisition devices that can quickly respond to relative humidity changes of environment in real‐time. Humidity sensor has widely applied in electronics, automotive, medical, agriculture, forestry, and animal husbandry fields 1–3 . In recent years, accompanying with development of digital information technology, there appears stronger demand for higher performance humidity sensors with high sensitivity, low humidity hysteresis, and stability to certain an extreme conditions 4,5 …”

Section: Introductionmentioning

confidence: 99%

“…Humidity sensor has widely applied in electronics, automotive, medical, agriculture, forestry, and animal husbandry fields. [1][2][3] In recent years, accompanying with development of digital information technology, there appears stronger demand for higher performance humidity sensors with high sensitivity, low humidity hysteresis, and stability to certain an extreme conditions. 4,5 It is well known that humidity sensitive material is the key of humidity sensor technology.…”

Section: Introductionmentioning

confidence: 99%

Enhancing anti‐thermal hysteresis ability, response stability and sensitivity of polymer humidity sensor by in‐situ crosslinking curing method

Xiong

et al. 2023

J of Applied Polymer Sci

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Compared with room temperature, the responsive curve of polymer humidity sensor usually presents a nonlinear shift and distortion at higher temperature conditions, this will sharply decrease the accuracy and working stability of polymer humidity sensor. In this paper, an organic-inorganic cross-linked interpenetrating network (c-IPN) between silocane compounds and acrylic prepolymer resin has been constructed to prepare a c-IPN humidity-sensitive material by in-situ crosslinking reaction. The results shows that the prepared c-IPN polymer humidity sensor shows more sensitive in range of 30-90% RH, with higher linearity coefficient of 0.9996 and lower hysteresis coefficient of 1.25% RH. And the c-IPN polymer humidity sensor exhibits more higher stability at higher temperature than that at room temperature. Meanwhile, the temperature coefficient of the c-IPN polymer humidity sensor can decrease to 0.53% RH/ C, along with temperature hysteresis curve linear coefficient increase to (R 2 = À0.999), when (3-aminopropyl) triethoxysilane is used at dosage of 10 wt.% druing crosslinking reaction. This study presents a feasible practical technical solution for developing novel high-performance polymer humidity-sensitive materials and its humidity sensors at wider temperature range.

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“…It has been more than 100 years since electromagnetic generators based on large dams and water turbines were used to generate electricity from hydropower. In the past decade, various miniaturized and flexible nanogenerators, which can effectively collect energy from natural water and be used for various small electronic devices, have attracted more and more interest. − These studies directly generate electricity through the electrical coupling between materials and various forms of water, including fluid, ,− droplet, , moisture, − waves, etc. The solid–liquid coupling shows a superior technology with high flexibility and eco-friendly development.…”

Section: Introductionmentioning

confidence: 99%

Nanofluidic Membrane with Spent Battery Residues for Efficient Energy Generation

Guo,

Xiong,

Han

et al. 2023

ACS Omega

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Harvesting energy in the ambient environment has become a dominant energy source and is promising toward a sustainable perspective. However, developing an energy generator with readily available raw materials and continuous output performance remains a challenge. Herein, we have demonstrated that a nanofluidic membrane with an asymmetric structure device (ASD) design by using available raw materials spent battery residues can achieve continuous power generation. The ASD can generate a voltage of ∼0.5 V by dropping 0.1 mL of water. Detailed experimental results reveal that ions in water play a synergistic role in enhancing output performance. By dropping 0.1 mL of seawater, the power output of ∼46.67 mW m–2 can be readily derived with voltage of ∼0.7 V. The work opens a viable way to generate electric power by environmental energy with facile structure design and easy-to-access materials. The output energy will greatly promote practical applications such as the power supply of low-power devices.

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A review of humidity gradient-based power generator: Devices, materials and mechanisms

Cited by 45 publications

References 98 publications

Ultra-Sensitive and Fast Humidity Sensors Based on Direct Laser-Scribed Graphene Oxide/Carbon Nanotubes Composites

Ultra-Sensitive and Fast Humidity Sensors Based on Direct Laser-Scribed Graphene Oxide/Carbon Nanotubes Composites

Enhancing anti‐thermal hysteresis ability, response stability and sensitivity of polymer humidity sensor by in‐situ crosslinking curing method

Nanofluidic Membrane with Spent Battery Residues for Efficient Energy Generation

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