二维纳米通道中质子上游扩散产生的电能

IF 38.1 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Nature nanotechnology Pub Date : 2024-07-15 DOI:10.1038/s41565-024-01691-5
Heyi Xia, Wanqi Zhou, Xinyue Qu, Wenbo Wang, Xiao Wang, Ruixi Qiao, Yongkang Zhang, Xin Wu, Chuang Yang, Baofu Ding, Ling-Yun Hu, Yang Ran, Kuang Yu, Sheng Hu, Jian-Feng Li, Hui-Ming Cheng, Hu Qiu, Jun Yin, Wanlin Guo, Ling Qiu
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引用次数: 0

摘要

自 1859 年以来,人们一直观察到离子在窄通道中沿着压力驱动的水流运动,这种运动被称为顺流离子传输,可诱发流电势,并使各种水伏特装置得以问世。与此不同的是,我们在此证明,在 MXene/聚乙烯醇薄膜的二维纳米通道中与水流相反的质子运动(称为上游质子扩散)也能产生电能。渗入通道的水会导致质子与通道表面的官能团解离,从而在通道内形成高质子浓度,推动上游质子扩散。再加上通道内水的扩散特别缓慢,一个 5 µl 的小水滴就能在 330 分钟内产生约 400 mV 的电压。得益于薄膜的超薄和柔韧特性,我们制造出了一种从人体皮肤汗液中收集能量的可穿戴设备。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Electricity generated by upstream proton diffusion in two-dimensional nanochannels
The movement of ions along the pressure-driven water flow in narrow channels, known as downstream ionic transport, has been observed since 1859 to induce a streaming potential and has enabled the creation of various hydrovoltaic devices. In contrast, here we demonstrate that proton movement opposing the water flow in two-dimensional nanochannels of MXene/poly(vinyl alcohol) films, termed upstream proton diffusion, can also generate electricity. The infiltrated water into the channel causes the dissociation of protons from functional groups on the channel surface, resulting in a high proton concentration inside the channel that drives the upstream proton diffusion. Combined with the particularly sluggish water diffusion in the channels, a small water droplet of 5 µl can generate a voltage of ~400 mV for over 330 min. Benefiting from the ultrathin and flexible nature of the film, a wearable device is built for collecting energy from human skin sweat. In contrast to the classical streaming potential relying on downstream ionic diffusion, an upstream proton diffusion within two-dimensional nanochannels is found to continuously generate electricity, advancing hydrovoltaic technology.
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来源期刊
Nature nanotechnology
Nature nanotechnology 工程技术-材料科学:综合
CiteScore
59.70
自引率
0.80%
发文量
196
审稿时长
4-8 weeks
期刊介绍: Nature Nanotechnology is a prestigious journal that publishes high-quality papers in various areas of nanoscience and nanotechnology. The journal focuses on the design, characterization, and production of structures, devices, and systems that manipulate and control materials at atomic, molecular, and macromolecular scales. It encompasses both bottom-up and top-down approaches, as well as their combinations. Furthermore, Nature Nanotechnology fosters the exchange of ideas among researchers from diverse disciplines such as chemistry, physics, material science, biomedical research, engineering, and more. It promotes collaboration at the forefront of this multidisciplinary field. The journal covers a wide range of topics, from fundamental research in physics, chemistry, and biology, including computational work and simulations, to the development of innovative devices and technologies for various industrial sectors such as information technology, medicine, manufacturing, high-performance materials, energy, and environmental technologies. It includes coverage of organic, inorganic, and hybrid materials.
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