SIOC 中文
ACS
Adv search

Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (19): 2248-2252. Previous Articles     Next Articles

Full Papers

Mg-8Li, Mg-8Li-0.5Ce和Mg-8Li-1Ce合金在0.7 mol•L－1 NaCl溶液中电化学性能的研究

吕艳卓*,1，徐岩2，王学新1，张毅1，陆天虹3   

  1. (1哈尔滨工程大学材料科学与化学工程学院 哈尔滨 150001)
    (2哈尔滨工程大学工程训练中心 哈尔滨 150001)
    (3南京师范大学化学与环境科学学院 南京210097)
  • 投稿日期:2010-12-06 修回日期:2011-06-01 发布日期:2011-06-26
  • 通讯作者: 吕艳卓 E-mail:luyanzhuo@yahoo.com.cn
  • 基金资助:

    黑龙江省自然科学基金;中英高校基本科研业务费专项资金

The Electrochemical Performances of Mg-8Li, Mg-8Li-0.5Ce and Mg-8Li-1Ce Alloys in 0.7 mol•L－1 NaCl Solution

Lü Yanzhuo*,1 Xu Yan2 Wang Xuexin1 Zhang Yi1 Lu Tianhong3   

  1. (1College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001)
    (2Engineering Training Center, Harbin Engineering University, Harbin 150001)
    (3Environmental Friendship Laboratory, College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097)
  • Received:2010-12-06 Revised:2011-06-01 Published:2011-06-26

PDF

821

Mg-8Li, Mg-8Li-0.5Ce and Mg-8Li-1Ce alloys were prepared using vacuum induction melting method. The electrochemical performances of Mg, Mg-8Li, Mg-8Li-0.5Ce and Mg-8Li-1Ce electrodes as the anodes of Mg-H2O2 semi-fuel cells in 0.7 mol•L－1 NaCl solution were investigated by means of potentiodynamic polarization, potentiostatic discharge and electrochemical impedance spectroscopy measurements. The surface morphology of the electrodes was observed by scanning electron microscopy. The results showed that the corrosion potential of Mg-8Li-1Ce (－1.49 V) is the most positive and the corrosion potential of Mg (－1.66 V) is the most negative among the four electrodes. The electro-oxidation activity of the electrodes in 0.7 mol•L－1 NaCl solution follows the sequence: Mg-8Li＞Mg-8Li-1Ce＞Mg＞Mg-8Li- 0.5Ce. The current density of Mg-8Li electrode discharged at －1.0 V reached around 40 mA•cm－2. The electro-oxidation activity of Mg-8Li is the highest among the four electrodes and the Li element “activated” Mg electrode.

Key words: Mg-Li alloy, Mg-H2O2 semi-fuel cell, anode material, electro-oxidation activity