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discharge performance of Mg-Al-Pb-La anode for Mg-air battery

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Transactions of Nonferrous Metals Society of China 2018年第11期28卷 2275-2287页

作者： Yan FENG Ge LEI Yu-qing HE Ri-chu WANG Xiao-feng WANG School of Materials Science and Engineering Central South UniversityChangsha 410083China

b The discharge performance of Mg-Al-Pb-La anode was investigated by electrochemical techniques and compared withthat of Mg-Al-Pb alloy. The results indicate that the Mg-Al-Pb-La anode provides enhanced corrosion resistance at open circlepotential, and exhibits better discharge activity than the Mg-Al-Pb alloy. The utilization efficiency of Mg-Al-Pb-La anode ishigher than that of commercial Mg-Al-Zn （AZ） and Mg-Al-Mn （AM） alloys. A single Mg-air battery with Mg-Al-Pb-La alloy asthe anode and air as the cathode has an average discharge potential of 1.295 V and a discharge capacity of 1370 mA·h/g duringdischarge at 10 mA/cm2, which is higher than that of batteries using Mg-Li anodes. The enhancement in discharge performance ofthe Mg-Al-Pb-La anode is caused by its modified microstructure, which reduces the self-corrosion and accelerates the spalling ofoxidation products during battery discharge. Furthermore, the dissolution mechanism of Mg-Al-Pb-La anode during the dischargeprocess was analyzed.

关键词： Mg-air battery Mg-Al-Pb-La alloy corrosion resistance discharge activity utilization efficiency

Corrosion and discharge performance of Mg-9%Al-2.5%Pb alloy as anode for seawater activated battery

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Transactions of Nonferrous Metals Society of China 2016年第8期26卷 2144-2151页

作者： Min DENG Ri-chu WANG Yan FENG Nai-guang WANG Lin-qian WANG School of Materials Science and Engineering Central South University Changsha 410083 China

To obtain a new kind of Mg?Al?Pb alloy anode material with low content of Pb, the corrosion and discharge behavior of Mg?9%Al?2.5%Pb (hereafter in mass fraction) alloy were investigated by immersion tests and electrochemical techniques, and compared with those of Mg?6%Al?5%Pb alloy. The results indicate that Mg?9%Al?2.5%Pb alloy exhibits a lower self-corrosion rate and higher utilization efficiency in contrast with Mg?6%Al?5%Pb alloy because of the higher content of Al. As the result of the decrease of Pb content, the discharge activity of Mg?9%Al?2.5%Pb alloy is relatively weaker but still meets the requirement of anode. These results reveal that Mg?9%Al?2.5%Pb alloy with a low content of Pb can serve as a good candidate for the anode material used in seawater activated battery.

关键词： Mg.Al.Pb alloy anode material self-corrosion rate utilization efficiency discharge activity

Research progress of magnesium anodes and their applications in chemical power sources

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Transactions of Nonferrous Metals Society of China 2014年第8期24卷 2427-2439页

作者：王乃光王日初彭超群胡程旺冯艳彭兵中南大学冶金与环境学院长沙410083 中南大学材料科学与工程学院长沙410083

Magnesium is a promising metal used as anodes for chemical power sources. This metal could theoretically provide negative discharge potential and exhibit large capacity during the discharge process. However, when the magnesium anode is adopted for practical applications, several issues, such as the discharge products adhered to the electrode surface, the self-discharge occurring on the anode material, and the detachment of metallic particles, adversely affect its inherently good discharge performance. In this work, the types of chemical power sources using magnesium as anodes were elaborated, and the approaches to enhance its anode performance were analyzed.

关键词： magnesium anode discharge activity anodic efficiency activation mechanism electrolyte