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US 11,769,900 B2Granted
Lithium ion battery and prelithiation method of anode
AssigneeRobert Bosch GmbH
InventorsXiaogang Hao, Rongrong Jiang
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Abstract
A method for prelithiating an anode of lithium ion batteries includes the following steps: (a) charging the battery to a voltage from about 4.2 to about 4.5 V at a first temperature; and (b) discharging the battery to a voltage from about 2.5 to about 3.2 V at a second temperature which is about 20 to 40° C. lower than the first temperature. Also provided is a lithium ion battery having an anode prelithiated by the method.
Claims8
A method for prelithiating an anode of a lithium ion battery, comprising:
- charging the lithium ion battery to a first voltage of from 4.2 V to 4.5 V at a first temperature;
- and
- discharging the lithium ion battery to a second voltage from 2.5 V to 3.2 V at a second temperature, which is 20° C. to 40° C. lower than the first temperature in order to prelithiate the anode of the lithium ion battery,
- wherein relative to a reversible lithium amount in the anode of the lithium ion battery which is not charged to the first voltage and discharged to the second voltage, the prelithiated anode of the lithium ion battery stores additional lithium, and
- wherein the additional lithium is 5% to 25% by weight of the anode of the lithium ion battery.
2 more elements
Dependencies are inferred from the claim text.