氯化铟对Mg极化腐蚀的影响

D. Snihirova, Linqian Wang, Min Deng, Cheng Wang, D. Hoeche, S. Lamaka, M. Zheludkevich
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摘要

镁是一种重量轻、成本相对较低、地球上储量丰富的材料。镁的优势特性增加了它在不同领域的应用,包括电池。含水镁-空气原电池代表了一类有前途的多种应用的电源。然而,在放电过程中,Mg阳极容易自腐蚀,形成不溶性氢氧化镁膜并生成氢气。提高电池性能的可能解决方案是通过适当的添加剂来处理Mg电极-电解质界面,这些添加剂可以作为腐蚀抑制剂来抑制Mg的自腐蚀,并防止阻塞沉淀Mg(OH)2的形成。在这项工作中,我们研究了作为有效添加剂的InCl3在低浓度下对Mg电极自腐蚀的影响[1]。采用EIS法和现场同时测定pH和溶解氧浓度的方法研究了cl3的性能。在极化过程中,由于其水解反应,能延缓电解质碱化,导致膜相关电位下降较小。然而,In3+添加量不足对整体环境也表现出pH缓冲作用,但不能阻碍局部pH的增加。[1]王丽,D. Snihirova,邓M.,王春林,D. Höche, S.V. Lamaka, M.L. Zheludkevich,氯化铟作为一次水电池电解质添加剂的研究,
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of indium chloride on corrosion of Mg under polarization
Magnesium is a light weight, relatively low cost and Earth abundant material. The advantageous properties of Mg increase its usage in different areas, including batteries. Aqueous Mg-air primary batteries represent one class of promising power sources for multiple applications. However, during the discharge Mg anode is prone to self-corrosion with formation of an insoluble film of magnesium hydroxide and generation of hydrogen. The possible solution for enhancement of battery performance is addressing the Mg electrode-electrolyte interface by appropriate additives, that serve as corrosion inhibitors for the suppression of the Mg self-corrosion and that prevent the formation of blocking precipitates, Mg(OH)2. In this work, we studied the effect of InCl3 as effective additive, which at low concentrations reduce the self-corrosion of Mg electrode [1]. The performance of InCl3 was investigated by EIS measurement and in-situ local simultaneous measurement of pH with concentration of dissolved oxygen. InCl3 was capable of retarding electrolyte alkalization during polarization due to its hydrolysis reaction, which leads to less film-relevant potential drop. Nevertheless, insufficient amount of In3+ addition also shows pH buffering effect for the bulk environment, but is not able to hinder the increase of local pH. [1] L. Wang, D. Snihirova, M. Deng, C. Wang, D. Höche, S.V. Lamaka, M.L. Zheludkevich, Indium chloride as an electrolyte additive for primary aqueous batteries,
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