Biomass-based hard carbon and preparation method and application thereof
Biomass-based hard carbon with a dense microporous structure and high sp2 hybrid carbon content was prepared by hydrothermal reaction of phenolic solvent, solid gas medium and aldehyde crosslinking agent. This solved the problems of low liquefaction efficiency and insufficient pore structure control in traditional methods and improved the performance of secondary batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- YONGJIANG LAB
- Filing Date
- 2026-05-29
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional methods for preparing biomass-based hard carbon suffer from low liquefaction efficiency, insufficient precision in pore structure control, and uncontrollable reaction pressure, which affect its performance as a negative electrode material, especially in the application of sodium-ion batteries.
A hydrothermal reaction is carried out using phenolic solvents with plant-derived biomass particles, a solid-gas medium, and aldehyde crosslinking agents. The reaction pressure is controlled at 5.5 MPa to 8.5 MPa. Through pre-carbonization and high-temperature calcination, biomass-based hard carbon with a dense microporous structure, high sp2 hybrid carbon content, and high-strength carbon skeleton is formed.
It significantly improves the initial efficiency, rate performance, and cycle performance of secondary batteries, especially in applications such as sodium-ion batteries.
Smart Images
Figure CN122403422A_ABST