Method of preparing lithium secondary battery
AssigneeLG Energy Solution, Ltd.
InventorsGui Long JIN, Seung He WOO, Hyo Sik KIM
Life of this patent
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Abstract
A method of preparing a lithium secondary battery is provided which may effectively perform pre-lithiation, wherein, a closed square band-shaped lithium foil having an opening formed at a center thereof is prepared during the preparation of the lithium secondary battery, and a negative electrode is disposed in the opening of the lithium foil, but pre-lithiation of the negative electrode may be performed without a separate pre-lithiation process by disposing the negative electrode and the lithium foil so as not to overlap with each other and disposing a negative electrode tab so as to be in contact with the lithium foil.
Claims8
A method of preparing an all-solid lithium secondary battery, the method comprising:
- preparing a negative electrode by forming a negative electrode active material layer including a first solid electrolyte on opposite surfaces of a current collector, the negative electrode having a negative electrode tab;
- preparing a lithium foil having an opening formed at a center thereof and having a closed band shape, in which lithium is coated on one surface or opposite surfaces of a copper foil;
- disposing the negative electrode in the opening of the lithium foil such that the negative electrode does not to overlap the lithium foil except for the negative electrode tab, which contacts the lithium foil, and preventing a portion, where the negative electrode tab and the lithium foil are in contact with each other, from being coated with the lithium;
- applying a second solid electrolyte to at least one surface of a structure formed after disposing the negative electrode in the opening of the lithium foil;
- disposing a positive electrode including a third solid electrolyte on the second solid electrolyte to form a stack;
- and
- casing the stack.
Dependencies are inferred from the claim text.