Method for manufacturing pre-lithiated negative electrode and lithium secondary battery comprising pre-lithiated negative electrode manufactured thereby
By controlling the moisture content of the cathode active material layer to form a lithium oxide layer, the pre-lithiation process in lithium-ion batteries is optimized to reduce lithium nitride formation and enhance battery performance.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2025-11-19
- Publication Date
- 2026-07-02
AI Technical Summary
The formation of by-products, particularly lithium nitride, during the pre-lithiation process in lithium-ion batteries leads to lithium loss and degrades battery performance due to the formation of a resistive layer at the cathode potential, which is not effectively addressed by existing methods.
A method for manufacturing a pre-lithiated cathode by controlling the moisture content of the cathode active material layer to form a lithium oxide layer, which acts as a buffer to slow down the pre-lithiation reaction rate and suppress the formation of lithium nitride, thereby reducing lithium loss and improving battery performance.
The method effectively minimizes lithium loss and suppresses the formation of lithium nitride, leading to lower resistive layers and improved battery performance by controlling the pre-lithiation reaction rate and heat generation.
Smart Images
Figure KR2025019126_02072026_PF_FP_ABST