镁空气电池阳极放电和钝化之间的滚动平衡机制

IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Miaomiao Zhang , Yu Guo , Jinchao Zou , Xiangyu Gao , Peikang Bai , Tao Wang , Zhiquan Huang
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引用次数: 0

摘要

镁合金具有重量轻、安全性高、负极电位高的优点,已成为金属空气电池理想的负极材料。但镁合金阳极的放电速率与钝化现象之间的不平衡严重限制了其应用。在本研究中,采用6种不同的轧制路线对AZ31镁合金进行加工。出乎意料地发现,90°交叉轧制可以有效地协调变形,平衡放电产物的生成和剥离,从而获得更高的阳极效率和比容量。这主要受镁合金阳极晶粒尺寸、晶粒分布和晶粒取向的相互作用影响。深入分析表明,在放电过程中,均匀分布的细晶组织和(101¯0101¯0)取向晶粒可有效减少“块效应”,在合金阳极表面形成松散、易破碎的放电产物。这样可以获得更高的放电电压、更稳定的放电性能和更高的阳极效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rolling balance mechanism between discharge and passivation of magnesium-air battery anodes
Magnesium alloy has become an ideal anode material for metal-air batteries due to its advantages of light weight, high safety and high negative potential. However, the balance between the discharge rate and the passivation phenomenon of the magnesium alloy anode seriously limits its application. In this study, AZ31 magnesium alloy was processed by six different rolling routes. It was unexpectedly found that 90° cross rolling can effectively coordinate the deformation and balance the generation and peeling of discharge products, resulting in higher anode efficiency and specific capacity. This is primarily influenced by the interaction of grain size, grain distribution, and crystal orientation of the magnesium alloy anode. In-depth analysis shows that during the discharge process, the uniformly distributed fine-grained structure and (101¯0) oriented grains can effectively reduce the 'block effect' and form loose, easily broken discharge products on the surface of the alloy anode. This results in higher discharge voltage, better stable discharge performance, and higher anode efficiency.
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来源期刊
Journal of Alloys and Compounds
Journal of Alloys and Compounds 工程技术-材料科学:综合
CiteScore
11.10
自引率
14.50%
发文量
5146
审稿时长
67 days
期刊介绍: The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.
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