Ultrathin Ti3C2Tx (MXene) membrane for pressure-driven electrokinetic power generation

Yang, Guoliang; Lei, Weiwei; Chen, Cheng; Qin, Si; Zhang, Liangzhu; Su, Yuyu; Wang, Jiemin; Chen, Zhiqiang; Sun, Lu; Wang, Xungai; Liú, Dan

doi:10.1016/j.nanoen.2020.104954

Cited by 61 publications

(38 citation statements)

References 52 publications

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“…When mechanical pressure is released (Figure 2a), with return of the drift flow of the mobile ions to its original equilibrium state, the electric field and built‐in potential across the depletion region also recover to their initial levels, leading to a gradual decrease of electron flow through the external circuit. [ 18,21 ]…”

Section: Resultsmentioning

confidence: 99%

Hydrogel Ionic Diodes toward Harvesting Ultralow‐Frequency Mechanical Energy

et al. 2021

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Energy harvesting from human motion is regarded as a promising protocol for powering portable electronics, biomedical devices, and smart objects of the Internet of things. However, state‐of‐the‐art mechanical‐energy‐harvesting devices generally operate at frequencies (>10 Hz) well beyond human activity frequencies. Here, a hydrogel ionic diode formed by the layered structures of anionic and cationic ionomers in hydrogels is presented. As confirmed by finite element analysis, the underlying mechanism of the hydrogel ionic diode involves the formation of the depletion region by mobile cations and anions and the subsequent increase of the built‐in potential across the depletion region in response to mechanical pressure. Owing to the enhanced ionic rectification ratio by the embedded carbon nanotube and silver nanowire electrodes, the hydrogel ionic diode exhibits a power density of ≈5 mW cm−2 and a charge density of ≈4 mC cm−2 at 0.01 Hz, outperforming the current energy‐harvesting devices by several orders of magnitude. The applications of the self‐powered hydrogel ionic diode to tactile sensing, pressure imaging, and touchpads are demonstrated, with sensing limitation is as low as 0.01 kPa. This work is expected to open up new opportunities for ionic‐current‐based ionotronics in electronics and energy devices.

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Section: Resultsmentioning

confidence: 99%

Hydrogel Ionic Diodes toward Harvesting Ultralow‐Frequency Mechanical Energy

et al. 2021

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“…Therefore, a large part of research is carried out to control bio‐organic fouling and several new types of materials were introduced to improve antifouling properties of membranes 5, 37–41. Recently, 2D MXene‐based lamellar membranes 17, 29, 42–45 have grown as an active area of research and sufficient efforts were carried out to fabricate state‐of‐the‐art MXene membranes for water purification and desalination in order to improve their separation performance and antifouling properties 42, 46–51. Initially, Gogotsi et al.…”

Section: Separation Performance Of Mxene‐based Membranesmentioning

confidence: 99%

Recent Advances in MXene‐based Separation Membranes

et al. 2021

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Two‐dimensional (2D) materials with unique atomic thickness are promising candidate for high performance separation membrane. Several 2D materials such as graphene, graphene oxide (GO), metal‐organic frameworks (MOFs), covalent frameworks (COFs), transition metal dichalcogenides (TMDCs), etc have been studied as a separation membrane due to their outstanding properties such as high mechanical strength, large surface area, good chemical and thermal stability, ease of functionalization, and hydrophilic surface. Recently, transition metal carbide also known as MXene, a new member of layered membrane family has attended significant interest in water purification, desalination, gas separation, and pervaporation. Herein, the most recent advances in 2D MXene‐based membranes from both experimental and computational aspects are reviewed. Emphasis is placed on materials' structures, properties, fabrication methods, and potential applications in membrane technology. Finally, this review closes with several recommendation and new directions in this research area.

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“…Moreover, in addition to osmotic energy generators, MXene membranes have great promise in other energy conversion fields, for instance, pressure‐driven electrokinetic power generation. [ 69 ]…”

Section: Applications In Separation Processesmentioning

confidence: 99%

MXene‐Based Membranes for Separation Applications

2021

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MXenes are a new type of 2D material, featuring numerous favorable properties, such as excellent flexibility, hydrophilicity, abundant functional groups, and high conductivity. Currently, MXene is a hot topic in the field of membrane separation processes. This timely review presents the recent progress in MXene-based membrane in terms of structural engineering and versatile applications. First, the preparation methods for MXene nanosheets and the fabrication technologies for MXene-based membranes are categorized. Then, the separation-based applications of MXene membranes, including gas separation, water treatment, organic solvent purification, nanofluidic ion transport, and osmotic energy conversion, are summarized. Finally, the bottlenecks that limit the application of MXenebased membranes are outlined, and future research prospects are discussed.

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Ultrathin Ti3C2Tx (MXene) membrane for pressure-driven electrokinetic power generation

Cited by 61 publications

References 52 publications

Hydrogel Ionic Diodes toward Harvesting Ultralow‐Frequency Mechanical Energy

Hydrogel Ionic Diodes toward Harvesting Ultralow‐Frequency Mechanical Energy

Recent Advances in MXene‐based Separation Membranes

MXene‐Based Membranes for Separation Applications

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