AZ31作为镁电池负极材料的电化学性能
Electrochemical Behavior of AZ31 Alloy as Anode Material for Magnesium Battery
摘 要
针对镁合金作为镁电池负极材料存在着自腐蚀速率大、负极利用率低、电压滞后等问题, 采用恒温浸泡、极化曲线、恒电流放电等手段对AZ31(挤压态)镁合金和纯镁(铸态)进行了试验研究和分析。研究了AZ31和纯镁在浓度为1.0 mol/L, 1.5 mol/L, 2.0 mol/L的MgSO4, Mg(ClO4)2, MgCl2和Mg(NO3)2溶液中的腐蚀行为和电化学性能, 具体分析了AZ31在不同电解液中的电化学行为。结果表明, AZ31在MgCl2溶液中的自腐蚀速率较高且生成较厚的腐蚀产物膜, 严重降低了电极的利用率, 在MgSO4溶液中则常常发生点蚀, 不适宜用作镁电池负极材料, 而在Mg(ClO4)2和Mg(NO3)2溶液中具有相对较好的耐蚀性能和放电效率。
开路电位
腐蚀速率
放电效率
magnesium battery
open circuit potential
corrosion rate
discharge efficiency
Abstract
The magnesium electrode material is greatly concerned in magnesium battery, but there are some problems such as the high self-corrosion rate, low current efficiency and potential lag at the beginning of sequel discharge. So the electrochemical behavior and corrosion behavior of AZ31 magnesium alloy and pure magnesium in MgSO4, Mg(ClO4)2, MgCl2 and Mg(NO3)2 solutions were investigated by means of immersion testing at constant temperature and measurements of polarization curve and constant-current discharge. The results show that the corrosion rate of AZ31 alloy in MgCl2 solution was the highest, and pitting corrosion took place in MgSO4 solution. However in Mg(ClO4)2 and Mg(NO3) the corrosion and discharge efficiency were relatively good.
中图分类号 O646
所属栏目 试验研究
基金项目 上海市科委基础研究重大项目(11DJ1400302); 嘉兴中科专项(2011AZ2011)
收稿日期 2011/12/15
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备注史永刚, 硕士研究生,
引用该论文: SHI Yong-gang,ZHANG Ya,HU Shao-feng,CHEN Qiu-rong. Electrochemical Behavior of AZ31 Alloy as Anode Material for Magnesium Battery[J]. Corrosion & Protection, 2012, 33(12): 1051
被引情况:
【1】余祖孝,郝世雄, "Na2MoO4对AZ61镁合金电化学行为的影响",机械工程材料 39, 56-59(2015)
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参考文献
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【3】尧玉芬, 陈昌国, 刘渝萍, 等. 镁电池的研究进展[J]. 材料导报, 2009, 23(10):119-121.
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【6】李吉刚, 孙杰. 镁二次电池材料的国内外研究现状[C]//中国·成都2007年11月第二届中国储能与动力电池及其关键材料学术研讨与技术交流会2007:235-239.
【7】Shi Z, Liu M L, Devang Naik, et al. Electrochemical properties of Li-Mg alloy electrodes for lithium batteries[J]. Journal of Power Sources, 2001, 92:70-80.
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