Mediating Zn Ions Migration Behavior via β-Cyclodextrin Modified Carbon Nanotube Film for High-Performance Zn Anodes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 38529926.
- Also identified by DOI 10.1021/acs.nanolett.4c00016.
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Abstract
Metallic Zn is considered as a promising anode material because of its abundance, eco-friendliness, and high theoretical capacity. However, the uncontrolled dendrite growth and side reactions restrict its further practical application. Herein, we proposed a β-cyclodextrin-modified multiwalled carbon nanotube (CD-MWCNT) layer for Zn metal anodes. The obtained CD-MWCNT layer with high affinity to Zn can significantly reduce the transfer barrier of Zn<sup>2+</sup> at the electrode/electrolyte interface, facilitating the uniform deposition of Zn<sup>2+</sup> and suppressing water-caused side reactions. Consequently, the Zn||Zn symmetric cell assembled with CD-MWCNT shows a significantly enhanced cycling durability, maintaining a cycling life exceeding 1000 h even under a high current density of 5 mA cm<sup>-2</sup>. Furthermore, the full battery equipped with a V<sub>2</sub>O<sub>5</sub> cathode displays an unparalleled long life. This work unveils a promising avenue toward the achievement of high-performance Zn metal anodes.