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Journal of Applied Electrochemistry

, Volume 42, Issue 10, pp 843–850 | Cite as

Effects of the phase constitution and microstructure on the electrochemical properties of melt-spun Al88−X Si12Mn X anode materials for lithium-ion batteries

  • Zhang Linping
  • Lu Feifei
  • Song Xianlei
  • Liang Pu
  • Wang Fei
  • Sun ZhanboEmail author
  • Li Xuepeng
  • Song Xiaoping
Original Paper

Abstract

The phase constitution, microstructure, electrochemical properties, and lithiation mechanism of the melt-spun Al88−X Si12Mn X (X = 1, 3, 5, 7, 10, 13, 15, mol%) ribbons were investigated as anode materials for lithium-ion batteries. When X = 1 and 3, the alloys were composed of coarse supersaturated α-Al grains and fine α-Si grains spread along the boundaries, and performed high initial capacities but fast capacity fade. As X was increased to 5 and 7, the constitution of alloys was characterized by nanoscaled α-Al and amorphous regions, and they exhibited capacities of 924 and 764 mAh g−1 initially, 733 and 578 mAh g−1 at the second cycle and then maintained 391 and 351 mAh g−1 after 50 cycles, respectively. When the Mn content was more than 10 %, an intermetallic compound Al4.01MnSi0.74 co-existed with α-Al and it evolved into the predominated constitution. The initial specific capacities were very high, but faded rapidly only experiencing few cycles. After lithiation, any compound with Li could not be detected in the Al85Si12Mn3 and Al83Si12Mn5 anodes, while the AlLi intermetallic compound could be detected when the Mn content was increased to 13 %. It could be considered that the appropriate phase constitution and microstructure in the Al83Si12Mn5 and Al81Si12Mn7 anodes were very beneficial to mitigating structure evolution, improving structure stability, and obtaining favorable electrochemical properties. The Al4.01MnSi0.74 compound was an active phase for Li storage in the present system, but it was responsible for serious structure evolution, poor cyclability, and pulverization.

Keywords

Al–Si–Mn alloy Melt spinning Lithium-ion batteries Phase constitution Microstructure Electrochemical properties 

Notes

Acknowledgments

This work was supported by the National Natural Science Foundation of China (50871081, 51002117, 51071117).

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Zhang Linping
    • 1
  • Lu Feifei
    • 1
  • Song Xianlei
    • 1
  • Liang Pu
    • 1
  • Wang Fei
    • 1
  • Sun Zhanbo
    • 1
    Email author
  • Li Xuepeng
    • 1
  • Song Xiaoping
    • 1
  1. 1.MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter, State Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’anChina

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