Non-aqueous electrolyte secondary battery and method for manufacturing same
By integrating a solid solution of lithium manganese oxide and lithium transition metal oxide as a pre-doped positive electrode active material and performing an initial high-voltage charge, the cycle characteristics and thermal stability of lithium-ion secondary batteries are improved, addressing capacity and efficiency issues.
WO2026142107A1PCT designated stage Publication Date: 2026-07-02LG ENERGY SOLUTION LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LG ENERGY SOLUTION LTD
- Filing Date
- 2025-12-12
- Publication Date
- 2026-07-02
Smart Images
Figure KR2025021592_02072026_PF_FP_ABST
Abstract
Provided are a non-aqueous electrolyte secondary battery having improved cycle characteristics and a method for manufacturing same. The non-aqueous electrolyte secondary battery comprises: an electrode assembly including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte, wherein: the positive electrode contains a first positive electrode active material and a second positive electrode active material; the second positive electrode active material contains, as a solid solution having an oxidation potential of 4.4 V or more on the basis of lithium, a solid solution of lithium manganese oxide and lithium transition metal oxide, and is at least partially electrochemically inactivated by a charging reaction; and the negative electrode contains a Si-based negative electrode active material.
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