Positive electrode and secondary battery comprising same
WO2026127230A1PCT designated stage Publication Date: 2026-06-18SAMSUNG SDI CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SAMSUNG SDI CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-06-18
AI Technical Summary
⚠Technical Problem
Lithium batteries face safety risks due to flammable organic solvents, and sulfur-based cathode active materials experience volume changes during charging and discharging, leading to performance degradation and reduced lifespan.
⚗Method used
A cathode comprising a lithium-containing sulfide-based positive electrode active material, a solid electrolyte, and a composite electrolyte with an oligomer, lithium salt, and additive, which is a viscous fluid, to accommodate volume changes and maintain ion and electron transport pathways.
🎯Benefits of technology
Suppresses performance degradation and enhances safety by stabilizing the cathode active material, improving energy density and cycle characteristics of the secondary battery.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure KR2025007112_18062026_PF_FP_ABST
Abstract
Disclosed are a positive electrode and a secondary battery comprising same, the positive electrode comprising: a positive electrode current collector; and a positive electrode active material layer disposed on one surface or both surfaces of the positive electrode current collector, wherein the positive electrode active material layer comprises a lithium-containing sulfide-based positive electrode active material, a solid electrolyte, and a composite electrolyte, the composite electrolyte comprises an oligomer, a lithium salt, and an additive, and the viscosity of the composite electrolyte is 5 cP to 100 cP at 25°C.
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