Corrosion and discharge behavior of Mg−xLa alloys(x=0.0−0.8) as anode materials  

Mg−xLa合金(x=0.0~0.8)阳极材料的腐蚀及放电行为

作　　者：Yan SONG Hua-bao YANG Yan-fu CHAI Qing-hang WANG Bin JIANG Liang WU Qin ZOU Guang-sheng HUANG Fu-sheng PAN Andrej ATRENS 宋燕;杨华宝;柴炎福;王庆航;蒋斌;吴量;邹勤;黄光胜;潘复生;Andrej ATRENS(重庆大学材料科学与工程学院机械传动国家重点实验室,重庆400044;重庆科技学院,重庆401123;School of Mechanical and Mining Engineering,The University of Queensland,Brisbane Qld,4072,Australia)

机构地区：[1]State Key Laboratory of Mechanical Transmissions,College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China [2]Chongqing Academy of Science and Technology,Chongqing 401123,China [3]School of Mechanical and Mining Engineering,The University of Queensland,Brisbane Qld,4072,Australia

出　　处：《Transactions of Nonferrous Metals Society of China》2021年第7期1979-1992,共14页中国有色金属学报（英文版）

基　　金：the financial supports from the National Key Research and Development Program of China(Nos.2016YFB-0101700,2016YFB0301104);the National Natural Science Foundation of China(Nos.U1764253,51971044,U1910213);the National Defense Basic Scientific Research Program of China;the Chong-qing Science and Technology Commission,China(Nos.cstc2017zdcy-zdzxX0006,cstc2018jszx-cyzdx0082);the Chongqing Scientific&Technological Talents Program,China(No.KJXX-2017002);Qinghai Scientific&Technological Program,China(No.2018-GX-A1).

摘　　要：The corrosion and discharge performances of binary Mg−xLa(x=0.2−0.8,wt.%)alloys as anode materials for Mg-based batteries were evaluated.Microstructure,hydrogen evolution,mass loss,electrochemical behavior,and half-cell discharge capabilities were characterized.The results show that the corrosion rate of the Mg matrix was decreased by alloying with La,and this could be attributed to the formation of a protective La2O3-containing film on the surface of the alloy.The Mg−0.2La alloy displayed the lowest corrosion rate,i.e.,2.4 mm/a in a 3.5 wt.%NaCl solution,Furthermore,the discharge performance of Mg−0.4La alloy was superior to that of pure Mg and other Mg−La alloys;this could be associated with the modified microstructure of the Mg−0.4La alloy,which decreased the self-corrosion and accelerated the detachment of the discharge products.研究镁基电池阳极材料Mg−xLa(x=0.2~0.8,质量分数,%)的腐蚀以及放电行为。观察显微组织并测试析氢、质量损失、电化学行为以及半电池放电性能。结果表明,镧元素的加入使得镁基体的腐蚀速率下降,主要是因为表面生成具有氧化镧的保护膜。Mg−0.2La合金在3.5%氯化钠溶液中表现出最低的腐蚀速率,即2.4 mm/a;同时,Mg−0.4La合金表现出优于纯Mg以及其他Mg−La合金的放电性能,这主要是因为Mg−0.4La合金具有改善的微观结构,该结构能降低自腐蚀速率,并加速放电产物的脱落。

关 键 词：Mg-based batteries Mg−La alloys corrosion rate discharge performance 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TM912[金属学及工艺—金属材料]