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

Xu, Yu; Ding, Dongyan; Yang, Xin; Zhang, Wenlong; Gao, Yongjin; Wu, Zhanlin; Chen, Guozhen; Chen, Renzong; Huang, Yuanwei; Tang, Jinsong

doi:10.3390/met9101072

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…The corrosion pits preferentially initiate at the locations of the iron-rich second phase particles and eutectic Si phase [43]. The locally cathodic iron-rich and eutectic Si phases enhance the cathodic reaction, leading to galvanic corrosion near the second phase.…”

Section: Corrosion Phenomenon Of Coating Alloymentioning

confidence: 99%

Effect of Si Content on Microstructures and Electrochemical Properties of Al-xSi-3.5Fe Coating Alloy

Wu,

Shen,

Wang

et al. 2023

Materials

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Hot-dip aluminum alloy is widely used in the engineering fields. However, during the aluminum plating process, Fe inevitably enters and reaches a saturation state, which has a significant impact on the corrosion resistance and microstructure of the coating. Currently, adding Si during the hot-dip aluminum process can effectively improve the quality of the coating and inhibit the Fe-Al reaction. To understand the effect of Si content on the microstructure and electrochemical performance of Al-xSi-3.5Fe coating alloys, the microstructure and post-corrosion morphology of the alloys were analyzed using SEM (Scanning Electron Microscope) and XRD (X-ray Diffraction). Through electrochemical tests and complete immersion corrosion experiments, the corrosion resistance of the coating alloys in 3.5 wt.% NaCl was tested and analyzed. The results show that the Al-3.5Fe coating alloy mainly comprises α-Al, Al3Fe, and Al6Fe. With the increase in Si addition, the iron-rich phase changes from Al3Fe and Al6Fe to Al8Fe2Si. When the Si content reaches 4 wt.%, the iron-rich phase is Al9Fe2Si2, and the excess Si forms the eutectic Si phase with the aluminum matrix. Through SKPFM (Scanning Kelvin Probe Force Microscopy) testing, it was determined that the electrode potentials of the alloy phases Al3Fe, Al6Fe, Al8Fe2Si, Al9Fe2Si2, and eutectic Si phase were higher than that of α-Al, acting as cathode phases to the micro-galvanic cell with the aluminum matrix, and the corrosion form of alloys was mainly galvanic corrosion. With the addition of silicon, the electrode potential of the alloy increased first and then decreased, and the corrosion resistance results were synchronous with it. When the Si content is 10 wt.%, the alloy has the lowest electrode potential and the highest electrochemical activity.

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Section: Corrosion Phenomenon Of Coating Alloymentioning

confidence: 99%

Effect of Si Content on Microstructures and Electrochemical Properties of Al-xSi-3.5Fe Coating Alloy

Wu,

Shen,

Wang

et al. 2023

Materials

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“…The rare earth element La can refine the Fe-rich phase and decrease the bad effects of the coarse Fe-rich phases on the microstructure and comprehensive performance of Al-Fe alloys [5][6][7][8]. Additionally, studies have shown that the addition of 0.1 wt.% Si could result in a good grain refinement of Al-Fe-Cu-La alloys and could improve overall performance of Al-Fe-Cu-La alloys [9].…”

Section: Introductionmentioning

confidence: 99%

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

Yang

Ding

et al. 2020

Metals

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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.

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Effect of La Addition on the Microstructure and Properties of Al-Fe-Mn Alloys for Lithium Battery Current Collectors

Zhu

Ding

Zhang

et al. 2021

Journal of Elec Materi

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

Cited by 4 publications

References 26 publications

Effect of Si Content on Microstructures and Electrochemical Properties of Al-xSi-3.5Fe Coating Alloy

Effect of Si Content on Microstructures and Electrochemical Properties of Al-xSi-3.5Fe Coating Alloy

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

Effect of La Addition on the Microstructure and Properties of Al-Fe-Mn Alloys for Lithium Battery Current Collectors

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