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- Title
Reactive P and S co-doped porous hollow nanotube arrays for high performance chloride ion storage.
- Authors
Xing, Siyang; Liu, Ningning; Li, Qiang; Liang, Mingxing; Liu, Xinru; Xie, Haijiao; Yu, Fei; Ma, Jie
- Abstract
Developing stable, high-performance chloride-ion storage electrodes is essential for energy storage and water purification application. Herein, a P, S co-doped porous hollow nanotube array, with a free ion diffusion pathway and highly active adsorption sites, on carbon felt electrodes (CoNiPS@CF) is reported. Due to the porous hollow nanotube structure and synergistic effect of P, S co-doped, the CoNiPS@CF based capacitive deionization (CDI) system exhibits high desalination capacity (76.1 mgCl– g–1), fast desalination rate (6.33 mgCl– g–1 min–1) and good cycling stability (capacity retention rate of > 90%), which compares favorably to the state-of-the-art electrodes. The porous hollow nanotube structure enables fast ion diffusion kinetics due to the swift ion transport inside the electrode and the presence of a large number of reactive sites. The introduction of S element also reduces the passivation layer on the surface of CoNiP and lowers the adsorption energy for Cl– capture, thereby improving the electrode conductivity and surface electrochemical activity, and further accelerating the adsorption kinetics. Our results offer a powerful strategy to improve the reactivity and stability of transition metal phosphides for chloride capture, and to improve the efficiency of electrochemical dechlorination technologies. P, S co-doped porous nanotube arrays on carbon felt (CoNiPS@CF) enhance chloride-ion storage for energy and water purification. This structure provides a short ion diffusion pathway, and improves activity of adsorption sites, promoting conductivity and activity for efficient chloride capture.
- Subjects
CHLORIDE ions; DOPING agents (Chemistry); WATER purification; ENERGY storage; SURFACE conductivity
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-49319-5