Effects of Heat Treatment on the Discharge Behavior of Mg-6wt.%Al-1wt.%Sn Alloy as Anode For Magnesium-Air Batteries
Effects of Heat Treatment on the Discharge Behavior of Mg-6wt.%Al-1wt.%Sn Alloy as Anode For Magnesium-Air Batteries
复制标题
DOI：
10.1007/s11665-017-2733-4
复制
发表时间：
2017-05
影响因子：
2.3
通讯作者：
Hanqing Xiong;Hualong Zhu;Jie Luo;Kun Yu;Chunchang Shi;Hong-jie Fang;Yu Zhang
中科院分区：
文献类型：
--
作者：
Hanqing Xiong;Hualong Zhu;Jie Luo;Kun Yu;Chunchang Shi;Hong-jie Fang;Yu Zhang
制备了不同条件下的Mg-6wt.%Al-1wt.%锡合金。用这种实验用的镁铝锡合金作为阳极组装了一次镁空气电池。研究了不同合金在3.5wt.%氯化钠溶液中的放电行为。结果表明，固溶处理有利于合金元素的均匀分布，减少放电产物的积累。基于固溶处理的镁-铝-锡负极的镁空气电池比铸态和老化的镁空气电池具有更高的工作电压和更稳定的放电过程。固溶处理虽然不能有效地提高实验镁铝锡合金的容量密度和阳极效率，但却是提高放电过程中功率和能量密度的有效途径。特别是在电流密度为30 mA/cm−2作用5 h时，溶液处理的阳极平均工作电压为1.212 V，阳极能量密度达到1527.2 mWg−1，浇铸的阳极能量密度为1481.3 mWhg−1，老化处理的阳极能量密度为1478.8 mWhg−1。
Mg-6wt.%Al-1wt.%Sn alloys under different conditions are prepared. Primary magnesium-air batteries are assembled using such experimental Mg-Al-Sn alloys as anodes. The discharge behaviors of different alloys are investigated in 3.5 wt.% NaCl solution. The results show that the solution treatment can facilitate the homogeneous distribution of alloy elements and reduce the accumulation of discharge products. The magnesium-air battery based on the solution-treated Mg-Al-Sn anode presents higher operating voltage and more stable discharge process than those on the as-cast and the aged ones. Although the solution treatment cannot effectively improve the capacity density and the anodic efficiency of the experimental Mg-Al-Sn alloy, it is an effective approach to increasing the power and the energy density during discharge process. Especially at the applied current density of 30 mA cm−2for 5 h, the solution-treated anode supplies 1.212 V average operating voltage, the anode energy density reaches 1527.2 mWhg−1, while the cast one is 1481.3 mWhg−1and the aged one is 1478.8 mWhg−1.