Precursor for Preparation of Cathode Active Material
A dual-density precursor for positive electrode active materials with a high-density core and low-density surface addresses lithium diffusion issues, enhancing charge/discharge efficiency and structural stability in secondary batteries.
KR102993169B1Active Publication Date: 2026-07-21L & F CO LTD
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Patent Information
- Authority / Receiving Office
- KR · KR
- Patent Type
- Patents
- Current Assignee / Owner
- L & F CO LTD
- Filing Date
- 2023-09-18
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Existing high-Ni based cathode active materials suffer from low charge/discharge efficiency due to lithium diffusion issues, structural instability, and poor cycle life and thermal stability during charging and discharging.
Method used
A precursor for a positive electrode active material is designed with a high-density core and a low-density surface, allowing for easy lithium diffusion and structural stability, achieved by varying the composition and density of the core and surface regions through controlled co-precipitation reactions.
Benefits of technology
The dual-density structure enhances charge/discharge efficiency, improves cycle life, and ensures thermal stability by facilitating lithium diffusion to the core, thereby improving the performance of secondary batteries.
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Smart Images
Figure 112023102950624-PAT00004_ABST
Abstract
The present invention provides a precursor for manufacturing an anode active material, characterized in that the central part and the surface part are sequentially formed from the center of the particle toward the outer surface, and the surface part has a relatively lower density compared to the central part.
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