Surface charge density-dependent performance of Ni–Al layered double hydroxide-based flexible self-powered generators driven by natural water evaporation

Tian, Jiahao; Zang, Yunhao; Sun, Jingchang; Qu, Jiangying; Gao, Feng; Liang, Gongying

doi:10.1016/j.nanoen.2020.104502

Cited by 64 publications

(51 citation statements)

References 43 publications

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“…It is reported that the UIO‐66 synthesized with the acid modulator (e.g., acetic acid) possesses numerous defects due to missing of organic linkers, resulting in unsaturated coordination of the Zr clusters [ 29,32 ] and subsequently the positively charged surface of UIO‐66. [ 33 ] Similar to the previously reported materials with positively charged surface, [ 13–16 ] since there are negatively charged OH − ions in water, EDLs with the excess OH − ions can form in the capillary channels. Therefore, when the water molecules move through the capillary channels driven by the water evaporation, the collective movement of negatively charged OH − ions results in a high electric potential at the bottom electrode and a low electric potential at the top electrode (Figure 3a).…”

Section: Figuresupporting

confidence: 75%

“…It has been recently found that the natural water evaporation can generate a continuous output of electric energy on a porous carbon black film. [ 6 ] However, this research field is still at infancy stage, and only a few materials, including carbon‐based materials [ 6–12 ] and several metal oxides (hydroxides), [ 13–16 ] have been demonstrated to show such capability. Therefore, it is highly desired to further develop other suitable materials in this emerging field of clean energy harvesting.…”

Section: Figurementioning

confidence: 99%

“…[ 6,13,14 ] Second, the surface of material possesses high zeta potential, resulting in high concentration of counterions within the EDLs. [ 10,15 ]…”

Section: Figurementioning

confidence: 99%

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Rational Design of MOF‐Based Hybrid Nanomaterials for Directly Harvesting Electric Energy from Water Evaporation

et al. 2020

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The continuous exploration of clean‐energy technology is critical for the sustainable development of society. The recent work on the electric energy harvesting from water evaporation has made a significant contribution to the utilization of clean energy for self‐powering systems. Here, a novel metal–organic‐framework‐based hybrid nanomaterial is delicately designed and synthesized by the growth of UIO‐66 nanoparticles on 2D AlOOH nanoflakes. Due to the combined merits from the 2D morphology, which is inherited from the AlOOH nanoflakes, and the high surface potential, which originates from the UIO‐66 nanoparticles, the device made of the AlOOH/UIO‐66 hybrid nanomaterials can harvest electric energy from natural water evaporation. An open‐circuit voltage of 1.63 ± 0.10 V can be achieved on the prototype devices made of the hybrid nanomaterial. As a proof‐of‐concept application, a small electric appliance, e.g., a digital calculator, is powered up by a 3 × 3 device array connected in a combined series–parallel configuration.

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Section: Figuresupporting

confidence: 75%

Section: Figurementioning

confidence: 99%

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Rational Design of MOF‐Based Hybrid Nanomaterials for Directly Harvesting Electric Energy from Water Evaporation

et al. 2020

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“…In the era of smart devices and bioinspired sensor networks, LDHs and related compounds have been demonstrated to play multiple roles, starting, for example, from green nanogenerators for realizing self-powered sensors. In this field, it is worth to mention the work by Cui et al [131], and those by Sun et al [132] and Tian et al [133], who realized a water-driven triboelectric nanogenerator (WD-TENG) and a natural water evaporation (NWE) driven generator, respectively, to harvest energy from water, the most abundant substance on our planet. Briefly, in the first approach, the realization followed a bottom-up strategy, by directly growing a well oriented MgAl-LDH nanosheet network on a metal substrate (Figure 10a).…”

Section: Nanogenerators and Physical Sensorsmentioning

confidence: 99%

“…The performance of the NWEG was reasonably supposed to be regulated by the surface charge density (dc), the hydrophilic character and the presence of nanochannels or pores in the NG active layer, which are easily tunable intrinsic properties in the case of LDHs. In a successive work [133] the same group reported on the relationship between dc and the NWEG performance by precisely tuning dc of NiAl-LDHs in the range of 2.52-4.59 e/nm 2 , by adjusting the molar ratio of Al 3+ to Ni 2+ . Another fundamental element in the fabrication of sensor systems is represented by the energy storage units.…”

Section: Nanogenerators and Physical Sensorsmentioning

confidence: 99%

Layered Double Hydroxides in Bioinspired Nanotechnology

et al. 2020

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Layered Double Hydroxides (LDHs) are a relevant class of inorganic lamellar nanomaterials that have attracted significant interest in life science-related applications, due to their highly controllable synthesis and high biocompatibility. Under a general point of view, this class of materials might have played an important role for the origin of life on planet Earth, given their ability to adsorb and concentrate life-relevant molecules in sea environments. It has been speculated that the organic–mineral interactions could have permitted to organize the adsorbed molecules, leading to an increase in their local concentration and finally to the emergence of life. Inspired by nature, material scientists, engineers and chemists have started to leverage the ability of LDHs to absorb and concentrate molecules and biomolecules within life-like compartments, allowing to realize highly-efficient bioinspired platforms, usable for bioanalysis, therapeutics, sensors and bioremediation. This review aims at summarizing the latest evolution of LDHs in this research field under an unprecedented perspective, finally providing possible challenges and directions for future research.

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Hierarchical Oriented Metal–Organic Frameworks Assemblies for Water‐Evaporation Induced Electricity Generation

Wang

et al. 2021

Adv Funct Materials

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Advances in metal–organic frameworks (MOFs) are stimulating interest in water‐evaporation induced electricity generation. Establishing design principles for desirable MOFs and revealing the structure‐activity relationship is essential to development of this field. Around this key issue, herein the concept of “hierarchical oriented MOFs” is proposed and the Cu(BDC‐OH) MOFs are organized into hierarchical oriented assemblies by successively using methods of hydrolysis, anion exchange reaction, and heteroepitaxy growth. It is discovered that this hierarchical oriented Cu(BDC‐OH) assemblies‐based generator containing long‐ranged ordered microporous channels exhibits a voltage of 0.6 V and electricity output of 1.56 nW cm–2 in the natural state of water evaporation. Finite element analysis and density functional calculation elucidate that hierarchical oriented structure of Cu(BDC‐OH) MOFs with certain surface charge density have an “aggregation effect,” dominating the final output voltages. This work not only offers valuable theoretical guidance for exploring self‐assembly of MOFs superstructures and water‐evaporation induced electricity generation, but also may open interesting perspectives for understanding some fundamental questions about structure‐activity relationship in MOFs materials science.

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Surface charge density-dependent performance of Ni–Al layered double hydroxide-based flexible self-powered generators driven by natural water evaporation

Cited by 64 publications

References 43 publications

Rational Design of MOF‐Based Hybrid Nanomaterials for Directly Harvesting Electric Energy from Water Evaporation

Rational Design of MOF‐Based Hybrid Nanomaterials for Directly Harvesting Electric Energy from Water Evaporation

Layered Double Hydroxides in Bioinspired Nanotechnology

Hierarchical Oriented Metal–Organic Frameworks Assemblies for Water‐Evaporation Induced Electricity Generation

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