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首页> 外文期刊>Advanced Functional Materials >Heterogeneous MXene/PS-b-P2VP Nanofluidic Membranes with Controllable Ion Transport for Osmotic Energy Conversion
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Heterogeneous MXene/PS-b-P2VP Nanofluidic Membranes with Controllable Ion Transport for Osmotic Energy Conversion

机译：具有可控离子传输的非均相蒙香/ PS-B-P2VP肿瘤渗透能量转换

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摘要

Membrane-based osmotic power harvesting is a strategy for sustainable power generation. 2D nanofluids with high ion conductivity and selectivity are emerging candidates for osmotic energy conversion. However, the ion diffusion under nanoconfinement is hindered by homogeneous 2D membranes with monotonic charge regulation and severe concentration polarization, which results in an undesirable power conversion performance. Here, an asymmetric nanochannel membrane with a two-layered structure is reported, in which the angstrom-scale channels of 2D transition metal carbides/nitrides (MXenes) act as a screening layer for controlling ion transport, and the nanoscale pores of the block copolymer (BCP) are the pH-responsive arrays with an ordered nanovoid structure. The heterogeneous nanofluidic device exhibits an asymmetric charge distribution and enlarged 1D BCP porosity under acidic and alkaline conditions, respectively; this improves the gradient-driven ion diffusion, allowing a high-performance osmotic energy conversion with a power density of up to 6.74 W m(-2) by mixing artificial river water and seawater. Experiments and theoretical simulations indicate that the tunable asymmetric heterostructure contributes to impairing the concentration polarization and enhancing the ion flux. This efficient osmotic energy generator can advance the fundamental understanding of the MXene-based heterogeneous nanofluidic devices as a paradigm for membrane-based energy conversion technologies.
机译：基于膜的渗透能收获是可持续发电的战略。具有高离子传导性和选择性的2D纳米流体正在出现用于渗透能量转换候选。然而，在nanoconfinement离子扩散被均匀2D膜与单调充电调节和严重的浓差极化，阻碍其导致不希望的功率转换性能。这里，具有两层结构的不对称纳米通道膜被报告，其中的2D过渡金属碳化物/氮化物（MXenes）动作的埃级信道作为一个屏蔽层，用于控制离子迁移，并且纳米级孔的嵌段共聚物的（BCP）是pH响应阵列具有有序纳米空隙结构。该非均相纳米流体装置具有酸性和碱性条件下，分别下不对称的电荷分布和放大1D BCP孔隙率;这改进了梯度驱动的离子扩散，通过混合人造河水和海水允许最多的功率密度的高性能的渗透能量转换到6.74脉冲W M（-2）。实验和理论模拟表明，该可调谐的不对称异质结构有助于损害浓差极化，提高离子通量。这种高效的渗透能量发生器可以提前基于MXene异构纳米流体装置作为用于基于膜的能量转换技术的范例的基本理解。

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  • 来源
    《Advanced Functional Materials》 |2021年第45期|2105013.1-2105013.10|共10页
  • 作者

    Lin Xiangbin; Liu Pei; Xin Weiwen; Teng Yunfei; Chen Jianjun; Wu Yadong; Zhao Yifei; Kong Xiang-Yu; Jiang Lei; Wen Liping;

  • 作者单位

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China;

    Chinese Acad Sci Tech Inst Phys & Chem CAS Key Lab Bioinspired Mat & Interfacial Sci Beijing 100190 Peoples R China|Univ Chinese Acad Sci Sch Future Technol Beijing 100049 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    asymmetric nanochannels; block copolymers; controlled ion transport; osmotic energy conversion; tunable surface charges;

    机译：不对称纳米烷基醚;嵌段共聚物;受控离子运输;渗透能量转换;可调表面收费;

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