Performance of Sn-Cu Alloy Anode at Low Temperature

材料科学技术（英文）, 2005, 21(5): 770-772.

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1.Materials Chemistry Lab, INET, Tsinghua University, Beijing 102201, China

2.Materials Chemistry Lab, INET, Tsinghua University, Beijing 102201, China

3.Materials Chemistry Lab, INET, Tsinghua University, Beijing 102201, China

4.Materials Chemistry Lab, INET, Tsinghua University, Beijing 102201, China

5.Materials Chemistry Lab, INET, Tsinghua University, Beijing 102201, China

Performance of Sn-Cu Alloy Anode at Low Temperature

Keywords： Sn-Cu alloy electrode

Sn-Cu alloy anode was prepared by pulsed electrodeposition for lithium ion batteries, and its electrochemical performance was tested at Iow temperature. When temperature decreased from 25℃ to -20℃, the Sn-Cu alloy anode provided the capacity retentions of 76% in the electrolyte of 1 mol/L LiBF4/EC+EMC+γBL and 51% in the electrolyte of 1 mol/L LiPF6/EC+DMC+DEC. Under the same conditions, the graphite anode presented the capacity retentions of only 41% and 18%, respectively. The Sn-Cu alloy anode showed better performance in the electrolyte of 1 mol/L LiBF4/EC+EMC+γBL than in the electrolyte of 1 mol/L LiPF6/EC+DMC+DEC, and kept much higher capacity retention than that of graphite at -20℃. The Sn-Cu alloy anode in the electrolyte of 1 mol/L LiBF4/EC+EMC+γBL (1:1:1, volume ratio) is promising for Iow temperature application of lithium batteries.

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Performance of Sn-Cu Alloy Anode at Low Temperature

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