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

journal contribution
posted on 2020-09-01, 00:00 authored by Guoliang Yang, Weiwei LeiWeiwei Lei, Cheng Chen, Alex QinAlex Qin, Liangzhu Zhang, Yuyu Su, Jiemin Wang, Frank ChenFrank Chen, Lu Sun, Xungai Wang, Dan LiuDan Liu
Harvesting energy from natural or daily mechanical movements is an economic and environment-friendly way to alleviate energy shortage. Here we demonstrate a two-dimensional (2D) electrokinetic energy conversion device based on ultrathin laminated Ti3C2Tx membrane (TCM) driven by pressure gradients. The applied pressure, pH, lateral size of Ti3C2Tx nanosheets and membrane thickness were investigated. The results revealed that these parameters could remarkably regulate the electricity generation with TCMs. The TCMs with abundant negatively charged 2D nanocapillaries produced high streaming current density of 1.3 mA m−2 and output power density of 0.29 μW m−2 under 5 kPa in 0.01 M aqueous solution of sodium chloride. The MXene membrane generators present good solution compatibility for electrolytes in different alkali metal ions and wide pH range (4–10). This work extends the application of MXenes providing a new platform for energy conversion from natural and daily-life environment.

History

Journal

Nano energy

Volume

75

Article number

104954

Pagination

1 - 8

Publisher

Elsevier

Location

Amsterdam, The Netherlands

ISSN

2211-2855

Language

eng

Publication classification

C1 Refereed article in a scholarly journal; C Journal article