Moisture-enabled electricity generation from gradient polyoxometalates-modified sponge-like graphene oxide monolith

Liu, Jia; Qi, Yan; Liu, Dongping; Dong, Dapeng; Liu, Dedi; Li, Zheng-Hua

doi:10.1007/s10853-018-3183-6

Cited by 26 publications

(17 citation statements)

References 39 publications

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“…As such, porous GO foam built by freeze-drying exhibits pronounced moisture harvesting ability, in contrast to a filtration-assembled membrane . The integration of hygroscopic salts (e.g., CaCl 2 , LiCl) or polymers ,, (e.g., PAAS, PVA) into the base material such as GO, is also capable of significantly improving the moisture harvesting capability and expands the operating conditions from high humidity to extreme low humidity, such as in deserts. Recently, metal-organic frameworks have also presented a comparable capacity to gather moisture and exhibit excellent long-term stability under arid conditions …”

Section: Chemical-to-electric Wegmentioning

confidence: 99%

“…Diverse materials for high-performance MEG have been developed, including carbon-based materials, ,,,,− inorganic material, − polymers, ,,− and others. − Generally, carbon-based materials, such as GO and porous carbon, show great advantages in the huge surface area and abundant assemblies, applicable to widespread conditions. For example, GO can be easily shaped into films and fibers, acting as wearable electronics or being woven into fabrics with excellent flexibility.…”

Section: Chemical-to-electric Wegmentioning

confidence: 99%

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Emerging Materials for Water-Enabled Electricity Generation

Huang

Cheng

2021

ACS Materials Lett.

105

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Water is one of the most abundant natural resources on Earth, which has attracted huge research interest in the field of energy harvesting and conversion, because of its environmental friendliness and easy access. Through precise regulation of functional materials and elaborate design of the solid/liquid interface, the interactions between water molecules and functional materials enable the generation of considerable electricity, giving researchers an alternative to extract renewable energy from water. In this Perspective, we will systematically discuss the water-enabled electricity generation (WEG) technologies, based on the interactions between functional materials and water. We mainly classify the WEGs into three types: mechanical-to-electric WEG, thermal-toelectric WEG, and chemical-to-electric WEG, according to the energy source of input water and the mode of energy conversion. For each type of WEG, the basic working principles for generating electricity are outlined, accompanied by a summary and comparison of system structures, working types, and performance characteristics. Recent significant progress in terms of the development of functional materials and the design of devices are emphasized. Efficient strategies involving a deep understanding of the solid/liquid interface and the structure of electric double layer, kinetics of ions adsorption, migration and diffusion or combination thereof, are also discussed. Then, we survey nascent fields promising to advance the development of WEGs, particularly in the area of self-powered and wearable electronics. The general requirements for developing next-generation functional materials for high-performance WEGs are further concluded, as well as standards for WEG's performance testing. The scientific and technological challenges and opportunities of WEG are finally addressed for future studies and practical applications.

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Section: Chemical-to-electric Wegmentioning

confidence: 99%

Section: Chemical-to-electric Wegmentioning

confidence: 99%

Emerging Materials for Water-Enabled Electricity Generation

Huang

Cheng

2021

ACS Materials Lett.

105

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“…68 Similarly, polyoxometalates (phosphotungstic acid (HPW)) are rich in mobile heteropolyanion and counter cation units and can also be used to modify spongy GO, so as to construct composite hydrovoltaic devices. 67 Hydrovoltaic generators using wet gas to generate electricity need to construct an oxidation functional group gradient, and the ion gradient is the main power generation mechanism. In addition to generating electricity by using moisture, GO-based hydrovoltaic generators can also be directly kept in water to generate electricity by evaporation, without constructing an ion gradient.…”

Section: Devicesmentioning

confidence: 99%

Graphene oxide as a versatile platform for emerging hydrovoltaic technology

Jiao

et al. 2022

J. Mater. Chem. A

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“…At present, many exciting results have been achieved in this field, showing great application foregrounds in wearable electronic devices and passive detection. Methods of achieving energy conversion include the following: humidity induces an ion concentration gradient inside the nanomaterial, , evaporation induces the directional movement of water molecules in nanotubes, − etc. One of the critical modes of action, also known as ionovoltaic, is droplet movement on the surface of nanofilms.…”

Section: Introductionmentioning

confidence: 99%

Origin of Enhanced Electricity Generation on Magnéli Phase Titanium Suboxide Nanocrystal Films

Wang

et al. 2021

ACS Appl. Energy Mater.

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The energy conversion process caused by relative motion of droplets and nanofilms has aroused widespread attention. However, the mechanism is still unclear, especially regarding the modification of the nanomaterial itself. In this study, we found that by annealing TiO 2 in a H 2 atmosphere at different temperatures, the Magneĺi phase titanium suboxide can be prepared with a lot of oxygen vacancies. Oxygen vacancies not only form negative charge centers inside the film, which enhance the attraction of Na + , but also increase the carrier concentration. By increasing the oxygen vacancy concentration, the measured V OC value was increased by ∼5 times and I SC by ∼30 times. Furthermore, a universal film preparation process was developed for the large-scale production of flexible energy conversion units based on the simple sol−gel method. Experimental results show that the prepared energy conversion unit has excellent performance of collecting rainwater energy and show a stable and continuous V OC output of ∼600 mV, combined with the surface hydrophobic treatment technology.

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Moisture-enabled electricity generation from gradient polyoxometalates-modified sponge-like graphene oxide monolith

Cited by 26 publications

References 39 publications

Emerging Materials for Water-Enabled Electricity Generation

Emerging Materials for Water-Enabled Electricity Generation

Graphene oxide as a versatile platform for emerging hydrovoltaic technology

Origin of Enhanced Electricity Generation on Magnéli Phase Titanium Suboxide Nanocrystal Films

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