Sunlight‐Coordinated High‐Performance Moisture Power in Natural Conditions

Bai, Jiaxin; Huang, Yaxin; Wang, Haiyan; Guang, Tianlei; Liao, Qihua; Cheng, Huhu; Deng, Shanhao; Li, Qikai; Shuai, Zhigang; Qu, Liangti

doi:10.1002/adma.202103897

Cited by 88 publications

(78 citation statements)

References 59 publications

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“…[7][8][9][10][11] In principle, MEGs convert considerable chemical potential energy released by gas-liquid moisture migration in air into useful electric power by constructing oxygen gradient conformation in graphene oxide or water gradient in homogenous polymer films and proteins. [1,12,13] Many methods have been attempted to improve their output performance, including asymmetrical structure, [14,15] chemical modification, [16,17] interface mediation, [18] heterogeneous system, [9] sunlight-coordinated moisture-electricity, [19] and new materials. [20,21] Since 2015, Qu et al has pioneered the work from graphene-based MEGs [22,23] with instantaneous output signal, followed by polymer-based MEGs with continuous power generation.…”

Section: Doi: 101002/adma202200693mentioning

confidence: 99%

Ionic Hydrogel for Efficient and Scalable Moisture‐Electric Generation

et al. 2022

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The progress of spontaneous energy generation from ubiquitous moisture is hindered the low output current and intermittent operating voltage of the moisture‐electric generators. Herein a novel and efficient ionic hydrogel moisture‐electric generator (IHMEG) is developed by rational combination of poly(vinyl alcohol), phytic acid, and glycerol‐water binary solvent. Thanks to the synergistic effect of notable moisture‐absorption capability and fast ion transport capability in the ionic hydrogel network, a single IHMEG unit of 0.25 cm2 can continuously generate direct‐current electricity with a constant open‐circuit voltage of ≈0.8 V for over 1000 h, a high short‐current density of 0.24 mA cm−2, and power density of up to 35 µW cm−2. Of great importance is that large‐scale integration of IHMEG units can be readily accomplished to offer a device with voltage up to 210 V, capable of directly driving numerous commercial electronics, including electronic ink screen, metal electrodeposition setup, and light‐emitting‐diode arrays. Such prominent performance is mainly attributed to the enhanced moisture‐liberated proton diffusion proved by experimental observation and theoretical analysis. The ionic hydrogel with high cost‐efficiency, easy‐to‐scaleup fabrication, and high power‐output opens a brand‐new perspective to develop a green, versatile, and efficient power source for Internet‐of‐Things and wearable electronics.

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Section: Doi: 101002/adma202200693mentioning

confidence: 99%

Ionic Hydrogel for Efficient and Scalable Moisture‐Electric Generation

et al. 2022

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“…In summary, all-biobased G.s -PSII HPEGs exhibited a broadly workable range of ambient humidity (10~90%RH) under full-spectrum light, which was promising for potential applications in most parts of the world. In addition, these HPEGs generated considerable output electricity under a relatively low light intensity (0.5~1.5 mW/cm 2 ) in comparison to other HPEGs (100~200 mW/cm 2 ) documented in the literature [ 18 , 44 ], which further boosted the all-weather applications of G.s -PSII HPEGs. In addition, the maximum power density (1.24 W/m 2 ) was generated under a light intensity of 100 mW/cm 2 , surpassing all HEGs reported hitherto.…”

Section: Discussionmentioning

confidence: 87%

All-Biobased Hydrovoltaic-Photovoltaic Electricity Generators for All-Weather Energy Harvesting

Ren

et al. 2022

Research

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Hygroelectricity generators (HEGs) utilize the latent heat stored in environmental moisture for electricity generation, but nevertheless are showing relatively low power densities due to their weak energy harvesting capacities. Inspired by epiphytes that absorb ambient moisture and concurrently capture sunlight for dynamic photosynthesis, we propose herein a scenario of all-biobased hydrovoltaic-photovoltaic electricity generators (HPEGs) that integrate photosystem II (PSII) with Geobacter sulfurreducens (G.s) for simultaneous energy harvesting from both moisture and sunlight. This proof of concept illustrates that the all-biobased HPEG generates steady hygroelectricity induced by moisture absorption and meanwhile creates a photovoltaic electric field which further strengthens electricity generation under sunlight. Under environmental conditions, the synergic hydrovoltaic-photovoltaic effect in HPEGs has resulted in a continuous output power with a high density of 1.24 W/m2, surpassing all HEGs reported hitherto. This work thus provides a feasible strategy for boosting electricity generation via simultaneous energy harvesting from ambient moisture and sunlight.

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“…Briefly, PSSA with abundant hydrophilic functional groups (i.e., -SO 3 H) plays a role in water absorption and mobile H + ions dissociation in response to vapor. 14 PSSA/PEDOT:PSS serves as the ion provider for thermodiffusion. 15 FeCN 4À/3À , as a redox couple, undergoes reversible reactions under a temperature difference.…”

Section: Characterization and Electrical Performance Of The Vhgmentioning

confidence: 99%

“…2(f) and Tables S1, S2, ESI, † the output performance of VHG was much higher than that of most power-generating devices reported previously based on either water adsorption or temperature difference under the same conditions. 9,11,12,14,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][32][33][34]36,38,40,41,[43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61]…”

Section: Characterization and Electrical Performance Of The Vhgmentioning

confidence: 99%