Uniformly dispersed zinc-copper alloy as anode preferentially deposited along Zn (002) plane for aqueous zinc ion batteries

IF 11 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Rare Metals Pub Date : 2025-05-29 DOI:10.1007/s12598-025-03365-0

Jing Zhu, Longkun Wu, Zhi Peng, Shuo Li, Xudong Li, Zekun Zhang, Ningning Zhao, Bin Li, Wei Meng, Ling Wang, Lei Dai, Zhangxing He

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引用次数: 0

Abstract

Aqueous zinc ion batteries (AZIBs) have attracted widespread attention due to their unique advantages. However, the growth of dendrites on the anode and the occurrence of side reactions limits the improvement of electrochemical performance of AZIBs. The alloying of zinc anode effectively alleviates above problems, which is beneficial to the long-term cycle performance of AZIBs. In this study, zinc-copper alloy anode (Cu@Zn) was synthesized by melting method. The method is not only simple and easy to operate, but also can make the synthesized anode Cu element uniform distribution and improve the corrosion resistance of the anode. At the same time, the Cu@Zn surface reconstructed has a large proportion of Zn (002) crystal surface exposure, with the zinc affinity of Cu. Both of them can induce the uniform deposition of Zn²⁺ ions along the Zn (002) crystal plane, further inhibiting the growth of dendrite. The Cu@Zn//Cu@Zn symmetrical batteries can cycle more than 1000 times at current densities of 0.3 and 1.2 mA cm⁻², and maintain a relatively low hysteresis voltage. And the discharge capacity retention rate of Cu@Zn//MnO₂ maintains 84.64% at 2.0 A g⁻¹ after 1000 cycles. This study provides a new methodological reference for the development of advanced AZIBs anodes.

Graphical abstract

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均匀分散锌铜合金阳极优先沿Zn（002）平面沉积

水锌离子电池以其独特的优点引起了人们的广泛关注。然而，阳极枝晶的生长和副反应的发生限制了azib电化学性能的提高。锌阳极的合金化有效地缓解了上述问题，有利于azib的长期循环性能。本研究采用熔融法制备了锌铜合金阳极（Cu@Zn）。该方法不仅操作简单方便，而且可以使合成的阳极铜元素分布均匀，提高阳极的耐腐蚀性。同时，重建的Cu@Zn表面有较大比例的Zn（002）晶体表面暴露，具有Cu的锌亲和性。两者都能诱导Zn2+离子沿Zn（002）晶面均匀沉积，进一步抑制枝晶的生长。Cu@Zn//Cu@Zn对称电池可以在0.3和1.2 mA cm−2的电流密度下循环1000次以上，并保持相对较低的滞后电压。在2.0 A g−1条件下，经过1000次循环后，Cu@Zn//MnO2的放电容量保持率保持在84.64%。本研究为先进azib阳极的开发提供了新的方法参考。图形抽象

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.