Systems and methods for disproportionation of silicon oxide for anode material
By using disproportionated silica particles to form a coating layer by reacting alkali metal salts with silica at high temperatures, the low coulombic efficiency of silica anode materials in lithium-ion batteries is solved, thereby improving the initial charge-discharge efficiency and energy density of the battery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ALBEMARLE CORP
- Filing Date
- 2024-12-10
- Publication Date
- 2026-07-17
AI Technical Summary
When silicon oxide is used as the anode material in existing lithium-ion batteries, there is an irreversible loss of active lithium, resulting in low initial coulombic efficiency and affecting battery performance.
By reacting alkali metal salts and/or alkaline earth metal salts with silica particles at high temperatures, disproportionated silica particles containing alkali metal and/or alkaline earth metal coatings are formed. The disproportionation process of silica to silica and elemental silicon is controlled, and silica particles with high crystalline phase content are produced.
It significantly improves the first-cycle coulombic efficiency of lithium-ion batteries, enhances the performance of anode materials, reduces silicon grain size, and increases battery energy density.
Smart Images
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