Method for pre-lithiation of negative electrode for secondary battery
AssigneeLG Energy Solution, Ltd.
InventorsYe Ri Kim, Sang Wook Woo, Oh Byong Chae
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Abstract
A method for pre-lithiation of a negative electrode for a secondary battery, for reducing the time required for pre-lithiation and reducing changes in volume of the electrode. The method includes immersing a negative electrode for a secondary battery in the electrolyte to perform electrolyte impregnation, and pre-lithiating the negative electrode. Immersing the negative electrode for the secondary battery in an electrolyte includes introducing the prepared negative electrode into an electrolyte bath containing the electrolyte, and removing air bubbles and moisture in the negative electrode by applying a vacuum to the electrolyte bath in which the negative electrode is immersed.
Claims12
A method for pre-lithiating a negative electrode for a secondary battery, the method comprising:
- immersing the negative electrode for the secondary battery in an electrolyte to perform electrolyte impregnation;
- and
- pre-lithiating the negative electrode,
- wherein immersing the negative electrode for the secondary battery in an electrolyte comprises:
- injecting the negative electrode into an electrolyte bath comprising the electrolyte;
- and
- removing air bubbles and moisture in the negative electrode by applying a vacuum to the electrolyte bath in which the negative electrode is immersed,
- wherein the vacuum is repeatedly applied twice or more,
- wherein each vacuum is applied for a time of 1 second to 60 seconds,
- wherein a time for immersing the negative electrode is 6 hours to 48 hours.
Dependencies are inferred from the claim text.