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Sn-Cu alloy anode was prepared by pulsed electrodeposition for lithium ion batteries, and its electrochemical per-formance was tested at low temperature. When temperature decreased from 25°C to -20°C, the Sn-Cu alloyanode provided the capacity retentions of 76% in the electrolyte of 1 mol/L LiBF4/EC+EMC+7BL and 51% inthe electrolyte of 1 mol/L LiPF6/EC+DMC+DEC. Under the same conditions, the graphite anode presented thecapacity retentions of only 41% and 18%, respectively. The Sn-Cu alloy anode showed better performance in theelectrolyte of 1 mol/L LiBF4/EC+EMC+7BL than in the electrolyte of 1 mol/L LiPF6/EC+DMC+DEC, and keptmuch higher capacity retention than that of graphite at -20°C. The Sn-Cu alloy anode in the electrolyte of 1 mol/LLiBF4/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 per-formance was tested at low temperature. When temperature decreased from 25 ° C to -20 ° C, the Sn-Cu alloyanode provided the capacity retentions of 76% in the electrolyte of 1 mol / L LiBF4 / EC + EMC + 7BL and 51% inthe electrolyte of 1 mol / L LiPF6 / EC + DMC + DEC. Under the same conditions, the graphite anode presents the capacity retentions of only 41% and 18%, respectively. The Sn-Cu alloy anode showed better performance in the electrolysis of 1 mol / L LiBF4 / EC + EMC + 7BL than in the electrolyte of 1 mol / L LiPF6 / EC + DMC + DEC, and keptmuch higher capacity retention than that of graphite at -20 ° C. The Sn-Cu alloy anode in the electrolyte of 1 mol / LLiBF4 / EC + EMC + γBL (1.1: 1, volume ratio) is promising for low temperature application of lithium batteries.