A self-sustaining pyroelectric nanogenerator driven by water vapor

Gao, Fengxian; Li, Wanwan; Wang, Xiaoqian; Fang, Xiaodong; Ma, Mingming

doi:10.1016/j.nanoen.2016.02.011

Cited by 87 publications

(43 citation statements)

References 32 publications

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“…As the external loading resistance increased, the peak output power first ascended and reached a maximum value of ≈55 nW with the resistance of 40 MΩ, after which the peak output power descended. This trend was similar to the trend reported for the PVDF film by other research groups 39,40. The maximum power density could be calculated as high as ≈104 μW m −2 .…”

Section: Resultssupporting

confidence: 91%

Bioinspired Temperature Regulation in Interfacial Evaporation

Jiang

Shen

Zhang

et al. 2020

Adv Funct Materials

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Human skin shows self‐adaptive temperature regulation through both enhanced heat dissipation in high temperature environments and depressed heat dissipation in cold environments. Inspired by such thermal regulation processes, an interfacial material system with self‐adaptive temperature regulation in the solar‐driven interfacial evaporation system, which can exhibit automatic temperature oscillation to enable pyroelectricity generation while producing water vapor, is reported. The bioinspired interface system is designed with the combination of a thermochromism‐based temperature regulator consisting of tungsten‐doped vanadium dioxide nanoparticles and a polymeric pyroelectric thin film of polyvinylidene fluoride. Under the simulated solar illumination with power density of 1.1 kW m−2, the bioinspired interfacial evaporation system achieves a self‐adaptive temperature oscillation with the maximum temperature difference of ≈7 °C and this system can simultaneously generate water vapor as well as electricity with an evaporation efficiency of 71.43% and a maximum output electrical power density of 104 µW m−2, respectively. The study demonstrates a design of thermal management at the interface of solar‐driven evaporation system to exhibit a self‐adaptive temperature oscillation and offers an alternative approach for the multifunctional harvesting of solar energy.

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Section: Resultssupporting

confidence: 91%

Bioinspired Temperature Regulation in Interfacial Evaporation

Jiang

Shen

Zhang

et al. 2020

Adv Funct Materials

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“…Based on these characteristics, the sequential solar‐driven hygroscopic water harvesting technology based on the interfacial heating is expected to be used for freshwater production, particularly for areas that lack direct access to clean water. Additionally, due to the high photothermal conversion efficiency, interfacial heating is promising to be widely used in other fields, such as solar desalination, [ 101,108,124,138–144 ] wastewater treatment, [ 66,76,98,99,104,112,113,116,118,122,145–152 ] high‐salinity brine treatment, [ 153 ] power generation, [ 154–156 ] synergistic solar electricity‐water generation, [ 157 ] etc.…”

Section: Resultsmentioning

confidence: 99%

Advances in Solar‐Driven Hygroscopic Water Harvesting

Zhuang

Wang

et al. 2020

Global Challenges

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Water scarcity is one of the greatest global challenges at this time. Significant efforts have been made to harvest water from the air, due to widely available water sources present in the atmosphere. Particularly, solar‐driven hygroscopic water harvesting based on the adsorption–desorption process has gained tremendous attention because of the abundance of solar energy in combination with substantial improvements in conversion efficiency enabled by advanced sorbents, improved photothermal materials, interfacial heating system designs, and thermal management in recent years. Here, recent developments in atmospheric water harvesting are discussed, with a focus on solar‐driven hygroscopic water harvesting. The diverse structural designs and engineering strategies that are being used to improve the rate of the water production, including the design principles for sorbents with high adsorption capacity, high‐efficiency light‐to‐heat conversion, optimization of thermal management, vapor condensation, and water collection, are also explored. The current challenges and future research opportunities are also discussed, providing a roadmap for the future development of solar‐driven hygroscopic water harvesting technology.

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“…[ 1 ] The wearable exoskeletons are rapidly increasing toward assistive purposes, which are designed to promote the functional activities at home, community, and society. [ 2,3 ]…”

Section: Introductionmentioning

confidence: 99%

Design of a Human Lower Limbs Exoskeleton for Biomechanical Energy Harvesting and Assist Walking

et al. 2020

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Powered exoskeletons are used to assist walking, but carrying a huge power supply system will bring inconvenience to humans. Passive exoskeletons lack control and accurate energy management. The muscles of the leg work periodically during walking. When the legs are swinging down after they are lifted to the highest point, it is gravity that works on the human body, and it does not require extra energy. Therefore, this article describes a wearable human lower limb energy harvesting and transmission exoskeleton (EHTE) to achieve biomechanical energy during walking; to achieve the energy harvest, management, and migration. The EHTE is mounted on the thigh and the flat spiral springs are used to create the energy from leg swings. The springs periodically store and release energy, to reduce the energy consumed by human muscles, improving walking efficiency. A prototype device is designed to evaluate its performance. The test shows that the EHTE can provide nearly 7 N force for the contralateral ankle joint. The results demonstrate that the EHTE can provide physical support for patients with lower limb dyskinesia and improve their mobility independently.

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A self-sustaining pyroelectric nanogenerator driven by water vapor

Cited by 87 publications

References 32 publications

Bioinspired Temperature Regulation in Interfacial Evaporation

Bioinspired Temperature Regulation in Interfacial Evaporation

Advances in Solar‐Driven Hygroscopic Water Harvesting

Design of a Human Lower Limbs Exoskeleton for Biomechanical Energy Harvesting and Assist Walking

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