Enhancing electricity generation from water evaporation through cellulose-based multiscale fibers network

Enhancement of water evaporation-induced electricity generation performance in multiscale fibers network (MFN) by photothermal conversion effect. [Display omitted] •Controlled preparation of dual 1D size-differentiated building blocks.•Effective water transport via hierarchical pore structure.•High...

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Veröffentlicht in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2024-10, Vol.498, p.155872, Article 155872
Hauptverfasser: Kong, Haoran, Li, Yuting, Yan, Jin, Liu, Xiang, Xiang, Mingxue, Wang, Qinhuan, Wang, Yu
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Sprache:eng
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Zusammenfassung:Enhancement of water evaporation-induced electricity generation performance in multiscale fibers network (MFN) by photothermal conversion effect. [Display omitted] •Controlled preparation of dual 1D size-differentiated building blocks.•Effective water transport via hierarchical pore structure.•High charge and hydrophilicity promote the selective ion transport.•Enhanced evaporation via photothermal effect to increase output performance.•Synergistic effect of mass transfer/phase transition and ion/electron migration. Harvesting energy from the water − solid interface through natural water evaporation provides a promising approach for generating sustainable electricity to power self-powered electronics. Advancing the bio-based hydrovoltaic materials enhances sustainability, with wood as a viable candidate due to the inherent hydrophilic and charged properties. However, current wood-based water evaporation-induced electricity generators (WEIGs) mainly depend on the “top-down” construction strategies. Wherein, the improvement of power density is constrained by the limited structural regulation, nondiverse building blocks, and monolithic enhancement mechanisms. Here, the high-performance wood-based WEIGs based on multiscale fibers network (MFN) are reported by embedding the Ti4O7 nanofibers (T4NF) inside the assemblies of TEMPO-oxidized cellulose nanofibrils (TOCNF) through a “bottom-up” route. Benefiting from the large specific surface area, high surface potential, and photothermal effect of conductive T4NF, the WEIG achieves a high short-circuit current of ∼13.7 μA while delivering ∼0.94 V open-circuit voltage. This work presents an efficient method to boost performance while understanding the impact of functional MFN on water evaporation.
ISSN:1385-8947
DOI:10.1016/j.cej.2024.155872