Useful spontaneous hygroelectricity from ambient air by ionic wood

Li, Yang; Cui, Jiedong; Shen, Hao-Yu; Liu, Chaocheng; Wu, Pei‐Lin; Qian, Zhiyun; Duan, Yulong; Liu, Detao

doi:10.1016/j.nanoen.2022.107065

Cited by 38 publications

(26 citation statements)

References 42 publications

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“…22 Li et al 23 reported a wood aerogel based on balsa wood with 18 MPa longitudinal yield strength in compression, which is a consequence of significantly higher density compared to this work. 23 Panels d and e of Figure 6 present the compressive stress− strain curves of NW and NW-Aerogel along the longitudinal direction. Panels d-1 to d-3 and e-1 to e-3 of Figure 6 show the compressive strain fields measured by mirror-assisted MV-DIC during loading.…”

Section: Mechanical Propertiesmentioning

confidence: 59%

“…Initial success was demonstrated by partial cell wall dissolution and regeneration through DMAc/LiCl or ionic liquid (IL) treatment of delignified wood, resulting in anisotropic wood aerogels with nanofibrillated networks filling the lumina. Further maintaining lignin as an interfiber bonding agent in the structure enhanced mechanical strength significantly while simplifying the process by eliminating the delignification step . However, the shaping of such wood aerogel is limited and the shape-memory function attempted here has never been reported.…”

Section: Introductionmentioning

confidence: 99%

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Strong, Shape-Memory Lignocellulosic Aerogel via Wood Cell Wall Nanoscale Reassembly

et al. 2023

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Polymer shape-memory aerogels (PSMAs) are prospects in various fields of application ranging from aerospace to biomedicine, as advanced thermal insulators, actuators, or sensors. However, the fabrication of PSMAs with good mechanical performance is challenging and is currently dominated by fossil-based polymers. In this work, strong, shape-memory bio-aerogels with high specific surface areas (up to 220 m2/g) and low radial thermal conductivity (0.042 W/mK) were prepared through a one-step treatment of native wood using an ionic liquid mixture of [MTBD]+[MMP]−/DMSO. The aerogel showed similar chemical composition similar to native wood. Nanoscale spatial rearrangement of wood biopolymers in the cell wall and lumen was achieved, resulting in flexible hydrogels, offering design freedom for subsequent aerogels with intricate geometries. Shape-memory function under stimuli of water was reported. The chemical composition and distribution, morphology, and mechanical performance of the aerogel were carefully studied using confocal Raman spectroscopy, AFM, SAXS/WAXS, NMR, digital image correlation, etc. With its simplicity, sustainability, and the broad range of applicability, the methodology developed for nanoscale reassembly of wood is an advancement for the design of biobased shape-memory aerogels.

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Section: Mechanical Propertiesmentioning

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Strong, Shape-Memory Lignocellulosic Aerogel via Wood Cell Wall Nanoscale Reassembly

et al. 2023

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“…12 If water flows through a confined space narrow enough such that there is an overlap of the EDL, the counter ions will be transported generating a streaming current. 13 Accordingly, porous materials with hydrophilic micro-/nanochannels such as wood, 14,15 textiles, [16][17][18][19][20] membranes, [21][22][23] 2D materials such as molybdenum disulfide, 24,25 MXenes 26,27 or metal-organic frameworks (MOFs) 28 have been leveraged to maximize streaming current. In particular, carbon-based materials including carbon black, 17,18,29,30 carbon nanotubes, 31 and reduced graphene oxide 21,32 have been considered as suitable candidates for the active electrodes in moisture-driven power generation devices because of their high electrical conductivity, ease of preparation and wide availability.…”

Section: Introductionmentioning

confidence: 99%

CNT-functionalized electrospun fiber mat for a stretchable moisture-driven power generator

et al. 2023

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“…Cu foils corrode in salty water but have still been used by accident or mistake as the electrodes. 9 , 14 , 17 , 24 , 25 Unfortunately, the contributions made by the corrosion of Cu to the output of WEIGs have not been properly acknowledged. We report here the purposeful use of corroding Cu, steel (St), or Al electrodes to construct Galvanic WEIGs.…”

Section: Introductionmentioning

confidence: 99%

“…The harvesting or the need to determine accurately the magnitude of the streaming current has required the use of “inert” electrodes, including graphite (C) electrodes, in the fabrication of WEIGs. Cu foils corrode in salty water but have still been used by accident or mistake as the electrodes. ,,,, Unfortunately, the contributions made by the corrosion of Cu to the output of WEIGs have not been properly acknowledged. We report here the purposeful use of corroding Cu, steel (St), or Al electrodes to construct Galvanic WEIGs.…”

Section: Introductionmentioning

confidence: 99%

Empowerment of Water-Evaporation-Induced Electric Generators via the Use of Metal Electrodes

et al. 2022

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As water rises in the pores of a partially immersed porous film due to capillary action, it carries along ions that are dissociated from the pore walls, generating a streaming current and potential. The water and current flows are sustained due to water evaporation from the unsubmerged surfaces. Traditionally, inert graphite (C) electrodes are used to construct water-evaporation-induced generators (WEIGs) that harness this electricity. WEIGs are environmentally friendly but have weak power outputs. Herein, we report on C/metal WEIGs that feature C top electrodes and metal bottom electrodes, as well as metal/metal WEIGs. Operating in a NaCl solution that facilitates the Galvanic corrosion of the metal (Cu, steel, and Al) electrodes, these Galvanic WEIGs outperform a C/C WEIG by thousands of times in power output. Equally interestingly, the asymmetric environments and potential differences between the two electrodes of a WEIG facilitate metal corrosion and fabrication of compact Galvanic WEIGs. This study clearly shows that one should choose electrodes with caution for the construction of true WEIGs.

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Useful spontaneous hygroelectricity from ambient air by ionic wood

Cited by 38 publications

References 42 publications

Strong, Shape-Memory Lignocellulosic Aerogel via Wood Cell Wall Nanoscale Reassembly

Strong, Shape-Memory Lignocellulosic Aerogel via Wood Cell Wall Nanoscale Reassembly

CNT-functionalized electrospun fiber mat for a stretchable moisture-driven power generator

Empowerment of Water-Evaporation-Induced Electric Generators via the Use of Metal Electrodes

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