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

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Institute of Electronic Materials and Technology, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2
SJTU-Huafon Joint Lab, Huafon NLM Al Co., Ltd., Shanghai 201506, China
3
Lab of Aluminium Alloys, Shanghai Huafon Materials Technology Institute, Shanghai 201203, China
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 109; https://doi.org/10.3390/met10010109
Received: 15 December 2019 / Revised: 29 December 2019 / Accepted: 4 January 2020 / Published: 10 January 2020
(This article belongs to the Special Issue Advances in Characterization of Heterogeneous Metals/Alloys)
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. View Full-Text
Keywords: Al–Fe–Si–La alloys; microstructure; strength; electrical conductivity; corrosion resistance Al–Fe–Si–La alloys; microstructure; strength; electrical conductivity; corrosion resistance
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Yang, X.; Ding, D.; Xu, Y.; Zhang, W.; Gao, Y.; Wu, Z.; Chen, G.; Chen, R.; Huang, Y.; Tang, J. Al–Fe–Si–La Alloys for Current Collectors of Positive Electrodes in Lithium Ion Batteries. Metals 2020, 10, 109.

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