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- Title
Oppositely Charged Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene Membranes with 2D Nanofluidic Channels for Osmotic Energy Harvesting.
- Authors
Ding, Li; Xiao, Dan; Lu, Zong; Deng, Junjie; Wei, Yanying; Caro, Jürgen; Wang, Haihui
- Abstract
Membrane‐based reverse electrodialysis (RED) is considered as the most promising technique to harvest osmotic energy. However, the traditional membranes are limited by high internal resistance and low efficiency, resulting in undesirable power densities. Herein, we report the combination of oppositely charged Ti3C2Tx MXene membranes (MXMs) with confined 2D nanofluidic channels as high‐performance osmotic power generators. The negatively or positively charged 2D MXene nanochannels exhibit typical surface‐charge‐governed ion transport and show excellent cation or anion selectivity. By mixing the artificial sea water (0.5 m NaCl) and river water (0.01 m NaCl), we obtain a maximum power density of ca. 4.6 Wm−2, higher than most of the state‐of‐the‐art membrane‐based osmotic power generators, and very close to the commercialization benchmark (5 Wm−2). Through connecting ten tandem MXM‐RED stacks, the output voltage can reach up 1.66 V, which can directly power the electronic devices.
- Subjects
ENERGY harvesting; POWER density; NANOFLUIDICS; ELECTRONIC equipment; SEAWATER; ARTIFICIAL seawater; OSMOTIC pressure
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 22, p8798
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201915993