摘要
进行微合金化将Ga、In、Sn和Mg元素添加到高纯Al(4N)中,测定Al合金阳极在4.0 mol/L NaOH溶液中的电化学、恒流放电和析氢速率,研究了Mg元素对Al-Ga-In-Sn合金空气电池阳极性能的影响。结果表明,添加的Ga、In、Sn和Mg元素生成的第二相或弥散在Al基体中。铝合金阳极的极化曲线和电化学阻抗谱表明,Mg可使晶粒细化和增加第二相的数量密度,且使Al-Ga-In-Sn-Mg合金的耐腐蚀性提高。晶粒细化提高了铝合金阳极微观结构的均匀性,晶界能提高合金的耐腐蚀性能。Mg含量为0.1%的合金其放电性能最佳,放电电压为1.5113 V时放电容量为2153 mA/cm^(2),阳极效率为72.26%。
The effect of Mg amount on the performance of Al-Ga-In-Sn alloys as anode for Al-air battery was investigated.The Al-Ga-In-Sn-Mg alloy was prepared by adding trace amount of elements Ga,In,Sn,and Mg to alloy the high-purity Al(4N).The added trace elements mainly contribute to the formation of second phases or precipitates in the Al matrix.As anode material,the electrochemical properties of the Al-Ga-In-Sn-Mg alloy in 4.0 mol/L NaOH solution were assessed by polarization curve measurement,electrochemical impedance spectra,and hydrogen evolution measurement.The results confirm that Mg has the effect of refining the grains and increasing the quantity of the second phase in the Al-alloy.Meanwhile,the corrosion resistance of the Al-Ga-In-Sn-Mg alloy has been improved.The grain refinement enhances the uniformity of the anodic microstructure of the Al-alloy,and the grain boundaries can play a role in hindering corrosion.The Al-Ga-In-Sn-Mg alloy shows an optimal discharge performance when the Mg content is 0.1%.Its discharge voltage is 1.5113 V,its discharge capacity is 2153 mA/cm^(2),and its anode efficiency is 72.26%.
作者
孟阿聪
孙耀宁
吴普
魏宁
Kashif Naseem
MENG Acong;SUN Yaoning;WU Pu;WEI Ning;Kashif Naseem(School of Mechanical Engineering,Xinjiang University,Urumqi 830017,China;School of Materials and Environmental Engineering,Hunan University of Humanities Science and Technology,Loudi 417000,China)
出处
《材料研究学报》
北大核心
2026年第2期127-135,共9页
Chinese Journal of Materials Research
基金
国家自然科学基金(52461022)
新疆大学优秀博士生创新项目(XJU2023BS052)。
关键词
金属材料
阳极效率
析氢腐蚀
第二相
metallic materials
anode efficiency
hydrogen precipitation corrosion
second phase
