Positive electrode active material, and lithium-sulfur battery comprising same
WO2026151008A1PCT designated stage Publication Date: 2026-07-16SAMSUNG SDI CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SAMSUNG SDI CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-07-16
AI Technical Summary
Technical Problem
Lithium-sulfur batteries face degradation of the anode active material and low ion conductivity due to significant volume changes during lithiation/delithiation processes, leading to reduced lifespan and performance.
Method used
Incorporating a sulfide-based core with an inorganic coating layer on the surface of the anode active material, comprising a sulfur compound and an ion-conducting material, along with a metallic inorganic material to enhance conductivity and reduce resistance.
Benefits of technology
Improves ionic and electronic conductivity, reduces internal resistance, and enhances the lifespan characteristics of lithium-sulfur batteries by stabilizing the anode active material.
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Smart Images
Figure KR2025007125_16072026_PF_FP_ABST
Abstract
The present invention relates to a positive electrode active material. More specifically, the present invention comprises a sulfide-based core and an inorganic coating layer on at least a portion of the surface of the sulfide-based core, wherein the sulfide-based core may include a composite of an ion-conductive material and at least one sulfur compound among S8 or Li2Sn (1≤n≤8). The sulfide-based core stores and releases electrochemical energy through an oxidation-reduction reaction of the sulfur compound, and the inorganic coating layer includes a metal inorganic material and may promote the oxidation-reduction reaction of the sulfide-based core.
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