Regulating Zinc Deposition via Zincophilic 2D-Cu2Te as the Current Collector to Suppress Dendrite Formation toward High Performance Aqueous Zinc-Ion Batteries

Ming Hsuan Tsai, Tuan Yue Lin, Tian Shun Su, Guan Min Chen, Yu chen Liu, Yu Ze Chen

研究成果: Article同行評審

摘要

In this study, we synthesized standing 2D δ-Cu2Te flakes (δ-CTFs) via a facile post-tellurization process, which served as the current collector to accommodate zinc (Zn) for AZIBs. These flakes exhibited low nucleation overpotential and low interfacial impedance, facilitating the plating/stripping of Zn ions. Interestingly, the hydrophilicity and standing structure of δ-CTFs guided the electrodeposited Zn to laterally grow on the surface of δ-CTFs, effectively suppressing Zn dendrite formation. The Zn@δ-CTFs anode exhibited a long-term cycling duration of 510 hours in a symmetric cell, which is far superior to previous reports. Even under high current density of 10 mA cm−2, the anode was able to perform stably with a cycle life of 110 hours. The machine learning model was exploited to predict the effective charge value, discovering that Zn migrated in Cu2Te were subject to the larger driving force of migration under applied field. Finally, the Zn@δ-CTFs//MnO2 full battery exhibited excellent rate-dependent capacity and maintained a capacity of 100 mAh g−1 after 1000 cycles at a current density of 1 A g−1, without Zn dendrite formation. This research provides a new strategy for regulating Zn deposition to address dendrite issues toward long lifespan AZIBs.

原文English
文章編號e202300107
期刊Batteries and Supercaps
6
發行號8
DOIs
出版狀態Published - 2023 8月

All Science Journal Classification (ASJC) codes

  • 能源工程與電力技術
  • 電氣與電子工程
  • 電化學

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