Enhancement of discharge properties of an extruded Mg-Al-Pb anode for seawater-activated battery by lanthanum addition

JOURNAL OF ALLOYS AND COMPOUNDS

卷:721

Article

Shi, Yinchun¹  Peng, Chaoqun¹  Feng, Yan¹  Wang, Richu¹  Wang, Naiguang¹ 

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

关键词: Mg-Al-Pb alloy;    Lanthanum;    TEM;    Grain orientation;    Corrosion behavior;    Discharge performance;   

DOI  :  10.1016/j.jallcom.2017.05.267

来源: Elsevier

【 摘 要 】

Mg-Al-Pb alloys are a typical anode material for seawater-activated batteries. The microstructure and electrochemical corrosion behavior of a Mg-Al-Pb alloy fabricated by extrusion, with and without lanthanum, were investigated in this study. The results indicated that the addition of lanthanum led to the formation of beta-Al11La3 and promoted recrystallization. The extruded Mg-Al-Pb-La exhibited less dislocations and twin defects than the extruded Mg-Al-Pb, contributing to its improved corrosion resistance. A single battery with a Mg-Al-Pb-La anode and CuCI cathode exhibited a higher cell voltage than that using a Mg-Al-Pb anode. The power density of the former was 260.8 mW cm(-2) discharged at 300 mA cm(-2), which were higher values than those of Mg-H2O2 semi -fuel batteries. (C) 2017 Elsevier B.V. All rights reserved.

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