Heat and osmosis cooperatively driven power generation in robust two-dimensional hybrid nanofluidic channels

Xiao, Tianliang; Li, Xuejiang; Liu, Zhaoyue; Lu, Bingxin; Zhai, Jing; Diao, Xungang

doi:10.1039/d3ta01306e

Cited by 12 publications

(4 citation statements)

References 50 publications

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“…Excitingly, the heterogeneous membrane has higher strength of 221.6 MP, strain of 3.2% and modulus of 11.3 GPa than that of pure MXene membrane (Figure h, Figure S9). Meanwhile, comparison with most nanofluidic membranes in reported literatures, the mechanical property reaches a relatively high level (Figure i). ,,− …”

mentioning

confidence: 71%

High Strength MXene/PBONF Heterogeneous Membrane with Excellent Ion Selectivity for Efficient Osmotic Energy Conversion

Duan,

Zhou,

et al. 2023

Nano Lett.

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mentioning

confidence: 71%

High Strength MXene/PBONF Heterogeneous Membrane with Excellent Ion Selectivity for Efficient Osmotic Energy Conversion

Duan,

Zhou,

et al. 2023

Nano Lett.

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“…4f). In this case; the surface charge is shown to have minimal effect on ion transport across the membrane, so the ion conductance near the bulk phase and the nanochannel show no ion selectivity [26][27][28] . Due to the increase in EDL thickness with decreasing electrolyte concentration, the EDL overlaps in the nanochannel at electrolyte concentrations below 0.5 M (Fig.…”

Section: Transmembrane Ion Transportmentioning

confidence: 96%

A High-performance Osmotic Energy Conversion Membrane Enabled by Cu2+-crosslinked Polyamide Acid

Zhai,

He,

Wang

et al. 2023

Preprint

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Ion-selective membranes can convert osmotic energy into electrical energy through reverse electrodialysis, thus enabling the generation of sustainable blue energy. However, developing ion-selective membranes with excellent ion selectivity and fast ion transport rates, while also suitable for large-scale production, poses a significant challenge. In this study, we propose a feasible solution on a large scale: an amorphous polymer membrane with sub-nanopore channels made from Cu2+-cross-linked polyamide acid (PAA-Cu). The presence of inherent carboxyl sub-nanochannels in the PAA-Cu membrane (membrane area 390 cm2), combined with the three-dimensional porous interconnected structure formed through Cu2+ coordination, synergistically enhances ion propulsion and selective ion transport properties under the dominating influence of surface charge. By leveraging the energy gradient, the PAA-Cu membrane demonstrates an output power density of 187 W m-2 when subjected to a salinity gradient of 50-fold (0.5 M/0.01 M) KCl. Moreover, it can extract osmotic energy from the diffusion between saline solutions of the same concentration, offering a promising energy harvesting system for industrial wastewater treatment. These findings suggest that the self-supporting PAA-Cu membrane holds great potential for the practical implementation of osmotic energy conversion.

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“…13,14 Achieving these properties often hinge on the chemical structure of ISMs. Recent efforts explored the use of two-dimensional materials, such as graphene, 15,16 molybdenum disulfide (MoS 2 ), 17 MXene, 18−20 as well as porous materials like metal organic frameworks (MOFs), 21,22 and covalent organic frameworks (COFs), 23,24 to increase membrane porosity. Yet, insufficiencies in charged groups hinder ion selectivity, thereby hampering ISM advancement.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Developing ISM technology promises to tap into osmotic energy from marine resources. ,, To maximize osmotic energy conversion efficiency, the ideal ISMs should boast higher ion selectivity and large ion flux, linked to higher surface charge density and lower resistance. , Achieving these properties often hinge on the chemical structure of ISMs. Recent efforts explored the use of two-dimensional materials, such as graphene, , molybdenum disulfide (MoS 2 ), MXene, − as well as porous materials like metal organic frameworks (MOFs), , and covalent organic frameworks (COFs), , to increase membrane porosity. Yet, insufficiencies in charged groups hinder ion selectivity, thereby hampering ISM advancement.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Osmotic Energy Conversion with Ultrahigh Ionic Conductivity in Sodium Polystyrenesulfonate/Cellulose Nanofiber Composite Membranes

Li,

Zhang,

Ahmad

et al. 2024

ACS Appl. Polym. Mater.

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Biomimetic nanofluidic membranes have made great progress but still suffer from various imperfections, including complex preparation and insufficient charge density, leading to low ionic conductivity, suboptimal ion selectivity, and insufficient energy conversion efficiency. In this study, we present an approach to fabricate a polymer-based nanofluidic membrane composed of sodium polystyrenesulfonate (PSS) rich in sulfonic acid groups and cellulose nanofibers (CNFs) abundant in carboxyl groups, using a simple solvent evaporation method. At low KCl concentrations, the composite membrane demonstrated an impressive ionic conductivity of up to 0.12 S cm–1. Moreover, the resulting nanofluidic osmotic energy generator, based on the PSS/CNF composite membrane, yields a remarkable output power density of 1.75 W m–2 when exposed to a 50-fold salinity gradient KCl solution at room temperature. Notably, the composite membranes exhibit significant pH responsiveness with the output power density reaching 1.97 W m–2 at pH 11. Furthermore, we conducted a numerical simulation to investigate and analyze the impact of charge density on ion transport properties for both the pristine CNF membrane and PSS/CNF composite membrane. This work provides inspiration for the development of polymer-based nanofluidic devices aimed at enhancing osmotic energy conversion and expanding applications in the field of seawater desalination.

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Heat and osmosis cooperatively driven power generation in robust two-dimensional hybrid nanofluidic channels

Abstract: The conversion of osmotic energy and low-grade heat into electricity provides new solutions to the looming energy crisis. The cooperative utilization of these two kinds of renewable energy sources might...

Cited by 12 publications

References 50 publications

High Strength MXene/PBONF Heterogeneous Membrane with Excellent Ion Selectivity for Efficient Osmotic Energy Conversion

High Strength MXene/PBONF Heterogeneous Membrane with Excellent Ion Selectivity for Efficient Osmotic Energy Conversion

A High-performance Osmotic Energy Conversion Membrane Enabled by Cu2+-crosslinked Polyamide Acid

Enhanced Osmotic Energy Conversion with Ultrahigh Ionic Conductivity in Sodium Polystyrenesulfonate/Cellulose Nanofiber Composite Membranes

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