AI Article Synopsis
- Metallic Zn is a potentially excellent anode material due to its availability, sustainability, and high theoretical energy capacity, but its practical use is hindered by issues like dendrite growth and unwanted side reactions.
- The introduction of a β-cyclodextrin-modified multiwalled carbon nanotube layer significantly improves the performance of Zn anodes by enhancing Zn transfer and promoting more consistent deposition while reducing side reactions.
- The modified Zn anode demonstrates remarkable cycling durability, lasting over 1000 hours at a high current density, indicating significant potential for developing high-performance batteries utilizing Zn as an anode material.
Article 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 at the electrode/electrolyte interface, facilitating the uniform deposition of Zn 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. Furthermore, the full battery equipped with a VO cathode displays an unparalleled long life. This work unveils a promising avenue toward the achievement of high-performance Zn metal anodes.
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| http://dx.doi.org/10.1021/acs.nanolett.4c00016 | DOI Listing |
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