一种多孔碳负载Sb2Se3纳米颗粒复合材料的制备方法与应用
By preparing porous carbon-supported Sb2Se3 nanoparticle composite materials, the problems of structural pulverization and poor electrochemical performance of sodium-ion battery anode materials during the sodiumification/desodiumification process were solved, achieving high conductivity and stability and improving the electrochemical performance of sodium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU UNIV OF SCI & TECH
- Filing Date
- 2023-11-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing sodium-ion battery anode material Sb2Se3 suffers from low electrochemical reaction kinetics, severe structural pulverization, and slow ion diffusion rate during the sodiumification/desodiumification process, resulting in poor electrochemical performance.
A method for preparing Sb2Se3 nanoparticle composites supported on porous carbon was adopted. Sb-C precursors were prepared by terephthalic acid and SbCl3, followed by solid-phase selenization with selenium powder and calcination to form Sb2Se3-C composites. The porous carbon framework provides a conductive network and Na+ diffusion pathway, thereby inhibiting the aggregation of nanoparticles.
The electrode material's conductivity and structural stability were improved, volume expansion was alleviated, and the electrochemical performance of the sodium-ion battery was enhanced. The initial discharge capacity was 420 mAh/g, and the capacity retention rate was 80% after 1000 cycles. It also showed good rate performance at different current densities.
Smart Images
Figure CN117776115B_ABST