Effect of Ce addition on the mechanical and electrochemical properties of a lithium battery shell alloy

et al. 2020

Self Cite

Al–xFe–Si–La alloys (x = 0.07, 0.2, 0.4 wt. %) were designed as current collectors of positive electrodes in lithium ion batteries, and the microstructure, tensile strength, electrical conductivity and corrosion resistance of the alloys were investigated with scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS), a tensile test, an electrical conductivity test, and an electrochemical test. It was found that the amount of Fe content greatly affected the quantity of the second phases in the alloys. The higher the Fe content was, the more the second phases were. With increase of the Fe content, the tensile strength and corrosion resistance of the Al–xFe–Si–La alloys were improved, and the electrical conductivity of the Al–xFe–Si–La alloys could meet the application requirements. Compared to the Al–0.07Fe–0.1Si–0.07La alloy, the strength of the Al–0.4Fe–0.1Si–0.07La alloy was greatly enhanced. The Al–0.4Fe–0.1Si–0.07La alloy also had a higher corrosion potential than that of the Al–0.07Fe–0.1Si–0.07La alloy.

Section: Tensile Propertiesmentioning

confidence: 99%

Al–Fe–Si–La Alloys for Current Collectors of Positive Electrodes in Lithium Ion Batteries

Yang

et al. 2020

Self Cite

“…However, there were many dimples in Al-0.2Fe-0.07La alloy and large dimples surrounded the small dimples. This also reflected that there were a large number of second phases in the Al-0.2Fe-0.07La alloy, which hindered the breaking of aluminum foil during tension, so that the yield strength and tensile strength of Al-0.2Fe-0.07La alloy were much higher than those of Al-0.07Fe-0.07La and Al-0.1Fe-0.07La alloy [21][22][23]. EDS analyses of dimples showed that the second phase in dimples of the three kinds of alloys was Fe-rich phase.…”

Section: Microstructurementioning

confidence: 99%

Tensile Properties and Corrosion Resistance of Al-xFe-La Alloys for Aluminium Current Collector of Lithium-Ion Batteries

Yang

et al. 2019

Self Cite

Al-xFe-La alloys (x = 0.07, 0.1, 0.2) for aluminum current collectors of lithium-ion batteries were prepared and the microstructure of Al-0.07Fe-0.07La, Al-0.1Fe-0.07La and Al-0.2Fe-0.07La aluminum alloys were observed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS). The experimental results showed that with the increase of Fe content, the size of the second phases in Al-xFe-0.07La alloys became finer and more dispersed and that the microstructure of the alloy had improved. The strength and corrosion resistance of Al-xFe-La alloys were studied by tensile tests and electrochemical tests and the morphological investigations of samples were also conducted by SEM and EDS. With the increase of Fe content, the strength and corrosion resistance of Al-xFe-La alloys became better. Compared to Al-0.07Fe-0.07La alloy, the yield strength and tensile strength of the Al-0.2Fe-0.07La alloy increased by 51.19% and 58.48% respectively, and the elongation increased by 88.41%. Moreover, Al-0.2Fe-0.07La alloy had much more positive corrosion potential and much smaller corrosion current than those of Al-0.07Fe-0.07La alloy.

“…Fe-rich and La-rich particles occurred during the solidification process. The constitutional supercooling effect not only refined the grains and Fe-rich particles, but also modified the morphology and composition of the Fe-rich phase by forming AlFeLa compounds [6,15,16].…”

Section: Microstructure Characterizationmentioning

confidence: 99%

“…Rare earth elements can strongly improve the mechanical properties and corrosion resistance of Al alloys [4][5][6][7][8]. Mi et al [9] found that with 1.5 wt % La, flower-like Al 3 Fe replaced the original acicular phase, and an Al 11 La 3 phase was formed in the subrapidly solidified Al-5Fe alloy.…”

Section: Introductionmentioning

confidence: 99%

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

Zhang

Zhang

et al. 2018

Self Cite

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 °C to 250 and 380 °C. After annealing at 250 °C, the Al-Fe-La alloys had the highest corrosion resistance due to refined grain and a high fraction of small-angle grain boundaries.