| 主权项 |
1. A method for cycling a sulfur composite lithium ion battery, the method comprising a step of charging and discharging the sulfur composite lithium ion battery at a first voltage range having a predetermined highest voltage and a predetermined lowest voltage, wherein the sulfur composite lithium ion battery comprises a cathode active material and an anode active material, the cathode active material comprising a sulfur composite, the sulfur composite is a sulfur based polymer, the anode active material is lithium metal, the first voltage range is smaller than and located in a range having a charge cutoff voltage and a discharge cutoff voltage, the charge cutoff voltage is 3V, and the discharge cutoff voltage is 0V, the first voltage range is 30% to 50% smaller than the range from 0V to 3V, and the step of charging and discharging satisfies at least one condition of (1) and (2):
(1) the predetermined lowest voltage of the first voltage range is larger than the discharge cutoff voltage of the sulfur composite; and (2) the predetermined highest voltage of the first voltage range is smaller than the charge cutoff voltage of the sulfur composite, wherein the cycling the sulfur composite lithium ion battery is defined as: when a voltage of the sulfur composite lithium ion battery is charged to the predetermined highest voltage, the charging stops; when the voltage of the sulfur composite lithium ion battery is discharged to the predetermined lowest voltage, the discharging stops; and the sulfur composite lithium ion battery is not charged above the charge cutoff voltage and the sulfur composite lithium ion battery is not discharged below the discharge cutoff voltage. |
