海水电池用Mg-Ga-Hg合金的电化学性能  

Electrochemical Properties of Mg-Ga-Hg Alloy Applied in Dissolved-Oxygen Seawater Battery

作　　者：高春燕[1] 芦永红[1] 徐海波[1] 

机构地区：[1]中国海洋大学化学化工学院,海洋化学理论与工程技术教育部重点实验室,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2015年第10期69-73,共5页Periodical of Ocean University of China

基　　金：国家自然科学基金重大仪器专项项目(41427803);青岛市科技发展计划项目(12-1-4-1-(28)-jch,12-4-1-28-gx);山东省科技发展计划项目(2014GHY115036);中央高校基本科研业务费项目(201022006)资助

摘　　要：本文针对海水电池的使用工况条件,通过开路电位、动电位极化、恒流放电、失重等测试方法,系统评价了MgGa-Hg合金在海水中的电化学行为。结果表明,Mg-Ga-Hg合金开路电位为-1.91^-1.95V,在1~9mA/cm2电流密度下放电时工作电位均负于-1.9V,激活时间小于10s,电流效率在70%左右,且间歇放电性能良好,在大于1.5%盐度的静态或动态海水中均具有良好的电化学活性,适合作海水溶解氧电池负极材料。Magnesium alloys applied in dissolved-oxygen seawater battery（DO-SWB）usually discharg at low current density and there exist few reports about their relevant electrochemical properties.Here the electrochemical properties of Mg-Ga-Hg alloy in seawater were thoroughly studied by measuring the open circuit potential,potentiodynamic polarization curves,galvanostatic discharge curves and mass loss data in terms of the working conditions of DO-SWB.The results showed that Mg-Ga-Hg alloy had good electrochemical activities in static or dynamic seawater with 1.5%salinity.The open circuit potential was-1.91^-1.95 Vand the activation time was less than 10 s and the discharge voltages were negative than-1.9Vat 1~9mA/cm2 current density.Moreover,it had good intermittent discharge behavior and its current efficiency reached 70%.Therefore,the Mg-Ga-Hg alloy can be used as anode material of DO-SWB.

关 键 词：Mg-Ga-Hg合金 海水溶解氧电池 电化学性能 镁合金 

分 类 号：TM911[电气工程—电力电子与电力传动]