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Open AccessArticle

Effect of Si Addition on Mechanical and Electrochemical Properties of Al-Fe-Cu-La Alloy for Current Collector of Lithium Battery

1
School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2
Huafon NLM Al Co., Ltd., Shanghai 201506, China
3
Shanghai Huafon Materials Technology Institute, Shanghai 201203, China
*
Author to whom correspondence should be addressed.
Metals 2019, 9(10), 1072; https://doi.org/10.3390/met9101072
Received: 8 September 2019 / Revised: 25 September 2019 / Accepted: 27 September 2019 / Published: 1 October 2019
(This article belongs to the Special Issue Metals and Alloys for Energy Conversion and Storage Applications)
The increasing demand for high-performance current collectors of lithium ion secondary batteries requires that the employed aluminum alloys have better mechanical properties and superior electrochemical performance. The effect of Si addition on the microstructure, tensile and electrochemical performance of Al-Fe-Cu-La alloy was investigated by optical microscopy, X-ray diffraction, scanning electron microscopy, a tensile test, conductivity test and Tafel polarization curve test. Experimental results indicated that Si addition to the Al-Fe-Cu-La alloy helped to refine the longitudinal grain size of the alloy. The Si-containing phase (AlFeSi) nucleated and grew along the surface of the AlFeLa phase. The Si addition to the Al-Fe-Cu-La alloy could greatly increase the tensile strength in the temperature range of −20 °C to 50 °C and improve high temperature stability of the alloy. Also, the addition of Si promoted the formation of the AlFeSi ternary phase, which helped to improve the corrosion resistance of the alloy. View Full-Text
Keywords: Al-Fe-Cu-La alloy; Si addition; microstructure; mechanical properties; corrosion behavior Al-Fe-Cu-La alloy; Si addition; microstructure; mechanical properties; corrosion behavior
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MDPI and ACS Style

Xu, Y.; Ding, D.; Yang, X.; Zhang, W.; Gao, Y.; Wu, Z.; Chen, G.; Chen, R.; Huang, Y.; Tang, J. Effect of Si Addition on Mechanical and Electrochemical Properties of Al-Fe-Cu-La Alloy for Current Collector of Lithium Battery. Metals 2019, 9, 1072.

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