Plasma-doped modified hard carbon negative electrode material and preparation method and application thereof
By modifying hard carbon materials in N2 or O2 atmospheres using plasma treatment technology, the problems of low initial coulombic efficiency, insufficient rate performance, and poor cycle stability of hard carbon materials in sodium-ion batteries are solved, and the electrochemical performance optimization of high capacity and long cycle life is achieved.
Patent Information
- Application Number
- CN202610305893.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-13
- Publication Date
- 2026-07-17
AI Technical Summary
Existing hard carbon materials in sodium-ion batteries suffer from low initial coulombic efficiency, insufficient rate performance, and poor cycle stability, mainly due to surface defects and unstable oxygen-containing functional groups leading to irreversible electrolyte decomposition and excessive SEI film growth.
Plasma treatment technology is used to treat hard carbon materials in an N2 or O2 atmosphere. By adjusting the plasma power and gas flow rate, the modification of the hard carbon surface is precisely controlled, introducing nitrogen- or oxygen-containing functional groups with good conductivity, eliminating unstable defects, and constructing a stable interface layer.
It significantly improves the initial coulombic efficiency, reversible capacity, and cycle stability of hard carbon materials, optimizes electrochemical performance for different application needs, and achieves high-capacity and long-cycle-life sodium-ion battery performance.
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Abstract
Citation Information
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