Biological Nanofibrous Generator for Electricity Harvest from Moist Air Flow

Li, Mingjie; Zong, Lu; Yang, Weiqing; Li, Xiankai; You, Jun; Wu, Xiaochen; Li, Zehui

doi:10.1002/adfm.201901798

Cited by 147 publications

(174 citation statements)

References 38 publications

(31 reference statements)

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“…In particular, the use of biomacromolecules such as chitosan, cellulose, and silk fibroins is emerging in recent years as an effective approach toward the fabrication of bulk bioinspired materials offering a combination of biocompatibility, low environmental impact, and high performance in multiple applications. [ 15a,85 ]…”

Section: Recent Trends In Freeze‐casting Materialsmentioning

confidence: 99%

Freeze Casting: From Low‐Dimensional Building Blocks to Aligned Porous Structures—A Review of Novel Materials, Methods, and Applications

2020

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Freeze casting, also known as ice templating, is a particularly versatile technique that has been applied extensively for the fabrication of well‐controlled biomimetic porous materials based on ceramics, metals, polymers, biomacromolecules, and carbon nanomaterials, endowing them with novel properties and broadening their applicability. The principles of different directional freeze‐casting processes are described and the relationships between processing and structure are examined. Recent progress in freeze‐casting assisted assembly of low dimensional building blocks, including graphene and carbon nanotubes, into tailored micro‐ and macrostructures is then summarized. Emerging trends relating to novel materials as building blocks and novel freeze‐cast geometries—beads, fibers, films, complex macrostructures, and nacre‐mimetic composites—are presented. Thereafter, the means by which aligned porous structures and nacre mimetic materials obtainable through recently developed freeze‐casting techniques and low‐dimensional building blocks can facilitate material functionality across multiple fields of application, including energy storage and conversion, environmental remediation, thermal management, and smart materials, are discussed.

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Section: Recent Trends In Freeze‐casting Materialsmentioning

confidence: 99%

Freeze Casting: From Low‐Dimensional Building Blocks to Aligned Porous Structures—A Review of Novel Materials, Methods, and Applications

2020

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“…Some biomaterials including proteins nanowires and biological nanofibers of cellulose, chitin, silk fiboin, and amyloid have been developed to enable the generation of electricity in a moist environment. [40,90]…”

Section: Biofibermentioning

confidence: 99%

“…Enhanced sweating is also symptomatic of physiological conditions such as anxiety, asthma, sunstroke and dyspnea, and could be monitored from a MEG attached to the skin (Figure 15f). [90] A self-powered water leakage detector based on TiO 2 nanowires with a microsecond response time has also been developed to monitor and trace small amounts of liquid leakage (Figure 15g). [212] In another application, MEGs can also be used for information storage.…”

Section: Sensorsmentioning

confidence: 99%

“…With a variety of different functional groups, these biological nanofibers are either negatively charged or positively charged and the zeta potential can be tuned through specific production procedures (Figure 10b). [ 90 ] When nanofibers are exposed to a moist air flow, a balance of water condensation (also including hydrophilic absorption) on the inlet side of air flow and evaporation (also including vapor molecule diffusion) occurs on the other outlet side of air flow. As the surface of nanofibers is charged, there is a streaming current when the water molecules diffuse from the inlet to the outlet side.…”

Section: Selection Of Materials For Harvesting Energy From Moisturementioning

confidence: 99%

Section: Selection Of Materials For Harvesting Energy From Moisturementioning

confidence: 99%

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Moisture‐Enabled Electricity Generation: From Physics and Materials to Self‐Powered Applications

et al. 2020

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Ongoing efforts to develop this energy have led to the creation of a variety of novel technologies based on photovoltaic, [12,13] piezoelectric, [14,15] triboelectric, [16,17] and thermoelectric principles. [18,19] Devices based on these technologies are readily incorporated into self-powered, battery-free electronic systems. This also acts to eliminate the harm to the environment caused by the use of conventional batteries. [20,21] As recyclable resource, water is not only indispensable to life but also constitutes the largest energy carrier on Earth (Figure 1a). As 71% of the Earth's surface is covered by water and 35% of solar energy incident on the Earth is absorbed by water, petawatts of energy are received in this way. [22] As the water resource is clean and sustainable, the energy contained in even a small fraction of the water on Earth can meet the current global energy demand if this energy can be efficiently harvested. Terrestrial water exists in vapor and liquid form including moisture, rain, clouds, lakes, rivers, and oceans. It also forms the basis for biological systems. Even though there is a long history of electricity generation from running water, most technologies only utilize the gravitational and kinetic energy in liquid water. [23] Such systems are inherently incompatible with the development of self-powered devices. The development of nanomaterials has enabled technology for the extraction of electrical energy from moisture, leading to The exploration of the utilization of sustainable, green energy represents one way in which it is possible to ameliorate the growing threat of the global environmental issues and the crisis in energy. Moisture, which is ubiquitous on Earth, contains a vast reservoir of low-grade energy in the form of gaseous water molecules and water droplets. It has now been found that a number of functionalized materials can generate electricity directly from their interaction with moisture. This suggests that electrical energy can be harvested from atmospheric moisture and enables the creation of a new range of self-powered devices. Herein, the basic mechanisms of moisture-induced electricity generation are discussed, the recent advances in materials (including carbon nanoparticles, graphene materials, metal oxide nanomaterials, biofibers, and polymers) for harvesting electrical energy from moisture are summarized, and some strategies for improving energy conversion efficiency and output power in these devices are provided. The potential applications of moisture electrical generators in self-powered electronics, healthcare, security, information storage, artificial intelligence, and Internet-of-things are also discussed. Some remaining challenges are also considered, together with a number of suggestions for potential new developments of this emerging technology.

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Covalent Cross‐Links Enable the Formation of Ambient‐Dried Biomass Aerogels through the Activation of a Triazine Derivative for Energy Storage and Generation

Tang

Zhang

et al. 2022

Adv Funct Materials

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Aerogels hold promises as lightweight replacements in various applications but are plagued by their fabrication equipment, such as supercritical dryers or lyophilizers that need to work under extreme conditions. This study presents a covalent chemistry approach to strengthen cellulose nanofibers (CNF) with carboxymethylated chitosan (CMCs) to produce aerogels by ambient drying. The cross-linking and gelation of the CNF and CMCs solutions are triggered by a triazine derivative, 4-(4,6-Dimethoxy[1.3.5]triazin-2-yl)-4-methylmorpholinium chloride hydrate, to form an amide bond. This approach leads to robust hydrogels that can resist capillary force during the ambient volatilization process and are turned into aerogels by freezing, solvent thawing and exchange, and ambient drying. The lightweight aerogels exhibit desirable qualities, including superior mechanical performance, a low density of 12.0 mg cm −3 , and low shrinkage of 10.1%. The presented CMCs/ CNF aerogels can also serve as a helpful carrier for conductive polymer, poly (3,4-ethylene dioxythiophene):tosylate, through in situ polymerization to demonstrate their applications. These conductive aerogels are used for highperformance supercapacitors and moisture-enabled electrical generators. This study provides inspiration and a reliable approach for the elaborately structural design of aerogels at ambient conditions and endows application prospects in energy storage and generation opportunities.

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Biological Nanofibrous Generator for Electricity Harvest from Moist Air Flow

Cited by 147 publications

References 38 publications

Freeze Casting: From Low‐Dimensional Building Blocks to Aligned Porous Structures—A Review of Novel Materials, Methods, and Applications

Freeze Casting: From Low‐Dimensional Building Blocks to Aligned Porous Structures—A Review of Novel Materials, Methods, and Applications

Moisture‐Enabled Electricity Generation: From Physics and Materials to Self‐Powered Applications

Covalent Cross‐Links Enable the Formation of Ambient‐Dried Biomass Aerogels through the Activation of a Triazine Derivative for Energy Storage and Generation

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