Improving the Intermittent Discharge Performance of Mg–Air Battery by Using Oxyanion Corrosion Inhibitor as Electrolyte Additive  

作　　者：Yan-Chun Zhao Guang-Sheng Huang Gui-lin Gong Ting-Zhuang Han Da-Biao Xia Fu-Sheng Pan 

机构地区：[1]State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University [2]National Engineering Research Center for Magnesium Alloys, Chongqing University

出　　处：《Acta Metallurgica Sinica(English Letters)》2016年第11期1019-1024,共6页金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No. 51531002);Demonstrative Project of Chongqing Science and Technology Commission (No. CSCT2014FAZKTJCSF50004);Fundamental Research Funds for the Central Universities (No. CDJZR14130009)

摘　　要：A widely used oxyanion corrosion inhibitor（Li2CrO4） was used as electrolyte additive（3.5 wt% Na Cl solution was used as electrolyte solution） for Mg–air battery. The potentiodynamic polarization tests showed that the presence of 0.1 wt% Li2CrO4in the Na Cl electrolyte reduced enormously the corrosion current density of the tested AZ31 Mg alloys.According to the intermittent discharge tests, the use of 0.1 wt% Li2CrO4 as electrolyte additive increased the anode efficiency of the Mg–air battery by 28.4%. The addition of 0.1 wt% Li2CrO4reduced the anode self-corrosion rate of the battery in the intermittent stage effectively. The product film after discharge was observed by scanning electron microscope, and the Mg–air battery containing 0.1 wt% Li2CrO4has a loose product film, which is beneficial to its discharge performance. So using Li2CrO4 as electrolyte additive could improve the intermittent discharge performance of Mg–air battery. And the use of oxyanion corrosion inhibitor as electrolyte additive may be an excellent way to improve the intermittent discharge performance of Mg–air battery.A widely used oxyanion corrosion inhibitor（Li2CrO4） was used as electrolyte additive（3.5 wt% Na Cl solution was used as electrolyte solution） for Mg–air battery. The potentiodynamic polarization tests showed that the presence of 0.1 wt% Li2CrO4in the Na Cl electrolyte reduced enormously the corrosion current density of the tested AZ31 Mg alloys.According to the intermittent discharge tests, the use of 0.1 wt% Li2CrO4 as electrolyte additive increased the anode efficiency of the Mg–air battery by 28.4%. The addition of 0.1 wt% Li2CrO4reduced the anode self-corrosion rate of the battery in the intermittent stage effectively. The product film after discharge was observed by scanning electron microscope, and the Mg–air battery containing 0.1 wt% Li2CrO4has a loose product film, which is beneficial to its discharge performance. So using Li2CrO4 as electrolyte additive could improve the intermittent discharge performance of Mg–air battery. And the use of oxyanion corrosion inhibitor as electrolyte additive may be an excellent way to improve the intermittent discharge performance of Mg–air battery.

关 键 词：Mg alloys CORROSION Mg-air battery Intermittent discharge performance Anode efficiency 

分 类 号：TG174.42[金属学及工艺—金属表面处理]