Spontaneous energy generation at the air–hydrogel interface with ultrahigh ion activity

Liu, Shanshan; Yang, Rongjie; Tong, Yunguang; Luo, Zisheng; Su, Bin; Lin, Xingyu

doi:10.1039/d2ta05221k

Cited by 6 publications

(7 citation statements)

References 50 publications

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“…e) A comparison of the output performance and stretchable performance of the SMEG with report MEGs. [ 24,28,36–43 ]…”

Section: Resultsmentioning

confidence: 99%

“…e) A comparison of the output performance and stretchable performance of the SMEG with report MEGs. [24,28,[36][37][38][39][40][41][42][43] hydrogel was first investigated (Figure S7, Supporting Information). As shown in Figure 2e, without adding any LiCl, a pure hydrogel can generate a voltage and current of ≈0.1 V and 3 μA, this could be attributed to the migration of protons dissociated from agarose (AG) induced by water evaporation, and the current output was increased with the increase of ion concentration because of the higher charge density and the lower resistance.…”

Section: Influencing Factors Of Fsmeg Output Performancementioning

confidence: 99%

“…d) A continuous recording of open-circuit voltage and short-circuit current of an FSMENG for 9000 s (25 ± 2 °C, RH 40 ± 5%). e) A comparison of the output performance and stretchable performance of the SMEG with report MEGs [24,28,[36][37][38][39][40][41][42][43].…”

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confidence: 99%

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High‐Performance Fully Stretchable Moist‐Electric Generator

Wen,

Sun,

Xie

et al. 2023

Adv Funct Materials

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The emerging moist‐electric generation that can harvest energy from the atmosphere moisture to power the next‐generation wearable electronics has attracted great attention recently. However, currently developed moist‐electric generators (MEGs) are hard to be fully stretchable owing to the lack of essential material properties and the restriction of the device construction. Here, stretchable hygroscopic ionic hydrogel and carbon black‐coated cotton knitted fabric are employed with a pair of symmetric Cu electrodes on top and bottom to fabricate a fully stretchable moist‐electric generator (FSMEG). The prepared FSMEG simultaneously achieves outstanding stretchability of 400%, sustained short‐circuit current of 50 µA, and open‐circuit voltage of 0.3 V, demonstrating superior comprehensive performances among current MEGs. The remarkable performances of FSMEG can be ascribed to the decreased crystallinity of ionic hydrogel and the synergistic effect of water evaporation force and redox reaction on electrodes. Of great importance is that large‐scale integration of FSMEG units is capable of driving electronics including calculators, light‐emitting‐diodes, and even cell phones. Beyond power generation, FSMEG also successfully exhibits practical application in self‐powered pressure sensing and weight identification. The optimal properties and design concepts of FSMEG provide new insight for designing next‐generation high‐performance hydroelectric harvesting devices with wide applications.

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“…e) A comparison of the output performance and stretchable performance of the SMEG with report MEGs. [ 24,28,36–43 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Influencing Factors Of Fsmeg Output Performancementioning

confidence: 99%

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High‐Performance Fully Stretchable Moist‐Electric Generator

Wen,

Sun,

Xie

et al. 2023

Adv Funct Materials

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“…26,27 Sodium alginate (SA) is a natural polysaccharide with excellent stability, biocompatibility, adhesion, and safety. 13,[28][29][30] Although SA itself has no ability to conduct electricity, it can bind to metal cations such as sodium and calcium. The selfassembly of SA is induced by these metal cations, resulting in a denser interior and facilitating the free movement of electrons.…”

Section: Introductionmentioning

confidence: 99%

“…22,27,28 SA, PVA and other materials will degrade naturally under specific circumstances of microorganisms. [30][31][32] This process will release carbon dioxide and water, hence avoiding environmental pollution. It is deemed as the top choice for producing eco-friendly polymer materials.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, robust and conductive eco-friendly self-assembling hydrogel: a novel material for electromagnetic shielding

Xu,

Pei,

Zhan

et al. 2023

New J. Chem.

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Patterned Coating of Ionic Diode Arrays Toward Flexible Moist‐Electric Generators to Power Wireless Sensor Nodes

Yao,

Lu,

et al. 2023

Adv Funct Materials

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Ubiquitous moisture is attractive for developing sustainable mobile power sources. However, how to endow moisture‐electric generators (MEGs) with fine design, mass customization, high power output, and foldability is still a largely unsolved problem. In this work, based on the Patterned Coating method, use is made of modulated carbon nanotube, nano‐Al2O3, and liquid metal inks to design and fabricate MEGs with properties required for their applications. A single MEG of the ionic diode type thus fabricated can generate an open‐circuit voltage (VOC) of 1.03 V and a short‐circuit current density (JSC) of 47.77 µA cm−2. Through large‐area integrated fabrication, an array containing 160 MEGs can generate a VOC of 154.1 V, and an array containing 100 MEGs can produce a short‐circuit current of 1.95 mA. In addition, the excellent wearability of MEG is verified by analyzing its electrical output performance after subjecting it to 800 cycles of bending deformations. The simple and cost‐saving fabrication technology issued from the work opens new perspectives for MEG applications and paves a path to their industrialization. For example, the customizable ionic diode arrays can meet the on‐demand power supply requirements of wireless sensor network nodes in the Internet of Things.

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Spontaneous energy generation at the air–hydrogel interface with ultrahigh ion activity

Abstract: Spontaneous and continuous collection of water energy from the natural environment provides an ingenious alternative for green electricity technologies. However, power generation using hygroscopic materials usually decays quickly in a...

Cited by 6 publications

References 50 publications

High‐Performance Fully Stretchable Moist‐Electric Generator

High‐Performance Fully Stretchable Moist‐Electric Generator

Mechanical, robust and conductive eco-friendly self-assembling hydrogel: a novel material for electromagnetic shielding

Patterned Coating of Ionic Diode Arrays Toward Flexible Moist‐Electric Generators to Power Wireless Sensor Nodes

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