Al-1.5Fe-xLa Alloys for Lithium-Ion Battery Package

作者：Zhang, Rong; Ding, Dongyan^*; Zhang, Wenlong; Gao, Yongjin; Wu, Zhanlin; Chen, Guozhen; Chen, Renzong; Huang, Yuanwei; Tang, Jinsong

来源：Metals, 2018, 8(11): 890.

DOI：10.3390/met8110890

• Al-Fe-La alloy
• lithium-ion package
• corrosion behavior
• annealing temperature

Al foil with high formability and corrosion resistance is highly desired for lithium-ion battery soft packaging. Annealing treatment has a significant impact on the performance of soft packaging Al foil. The effects of both La content and the annealing temperature on the microstructure, mechanical properties, and corrosion behavior of Al-1.5Fe-La alloy was investigated through optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), tensile testing, potentiodynamic polarization testing, and electrochemical impedance spectroscopy (EIS) testing. A higher addition of La resulted in the formation of AlFeLa particles and a refinement of the Fe-rich second phase. The Al-1.5Fe-0.25La alloy had a higher formability and corrosion resistance than the Al-1.5Fe-0.1La alloy. Microstructure analysis indicated that recovery, recrystallization, and grain growth successively occurred in the Al-Fe-La alloy with the increase of the annealing temperature from 200 degrees C to 250 and 380 degrees C. After annealing at 250 degrees C, the Al-Fe-La alloys had the highest corrosion resistance due to refined grain and a high fraction of small-angle grain boundaries.

• 出版日期2018-11
• 单位上海交通大学