Constructing a buffer macroporous architecture on silicon/carbon anode for high-performance lithium-ion battery

Achieving a rational structural design to optimize the stress distribution in silicon/carbon composites has been demonstrated as an effective approach. In this study, we developed high structural stability silicon/carbon anodes with a buffer macroporous architecture (Si@C@CNS) by template method usi...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2024-03, Vol.35 (7), p.531, Article 531
Main Authors: Xu, Zhaopeng, Du, Juntao, Feng, Chenming, He, Jiale, Li, Tianjin, Jia, Huina, Song, Kedong
Format: Article
Language:English
Subjects:
Anodes
Buffers
Carbon
Characterization and Evaluation of Materials
Charge efficiency
Charge transfer
Chemistry and Materials Science
Composite materials
Design optimization
Electrode materials
Electrodes
Electrolytes
Electron transport
Ethanol
Formaldehyde resins
Ion diffusion
Lithium
Lithium-ion batteries
Materials Science
Mesophase
Morphology
Nanoparticles
Optical and Electronic Materials
Pore size
Rechargeable batteries
Silicon
Stress distribution
Structural design
Structural stability
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Summary:Achieving a rational structural design to optimize the stress distribution in silicon/carbon composites has been demonstrated as an effective approach. In this study, we developed high structural stability silicon/carbon anodes with a buffer macroporous architecture (Si@C@CNS) by template method using resorcinol–formaldehyde resin and mesophase pitch as carbon sources. The buffer macroporous architecture effectively mitigates the volume change of silicon anodes, maintaining the integrity of the electrode structure. Additionally, the ordered soft carbon framework derived from mesophase pitch enhances charge transfer efficiency during charge/discharge processes, facilitating lithium-ion diffusion and electron transport. The resulting Si@C@CNS anode material maintains a specific capacity of 682 mA h g −1 after 500 cycles at a high current density of 1 A g −1 with only 12.3% expansion in electrode thickness. This approach provides novel insights into optimizing the structural design of silicon/carbon composite materials through dual-carbon buffer macroporous architecture.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-024-12237-9