摘要
Sn-Cu alloy anode was prepared by pulsed electrodeposition for lithium ion batteries, and its electrochemical performance was tested at low 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 1mol/L LiBF4/EC＋EMC＋γBL （1：1：1, volume ratio） is promising for low temperature application of lithium batteries.
Sn-Cu alloy anode was prepared by pulsed electrodeposition for lithium ion batteries, and its electrochemical performance was tested at low 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 1mol/L LiBF4/EC＋EMC＋γBL （1：1：1, volume ratio） is promising for low temperature application of lithium batteries.
