Improving Sodium-Ion Battery Performance with a Yolk-Shell Structure
Author Information
Author(s): Lim Hyojun, Yu Seungho, Chang Wonyoung, Chung Kyung Yoon, Choi Wonchang, Kim Sang‐Ok
Primary Institution: Korea Institute of Science and Technology (KIST)
Hypothesis
Can a yolk-shell structured Sn@C/SiOC nanohybrid improve the sodiation kinetics and stability of sodium-ion batteries?
Conclusion
The Sn@C/SiOC nanohybrid shows high capacity, excellent rate performance, and stability over 1500 cycles.
Supporting Evidence
- The Sn@C/SiOC nanohybrid achieved a specific capacity of approximately 500 mAh g−1 at 1 A g−1.
- It maintained 91.1% capacity retention after 1500 cycles at 5 A g−1.
- The yolk-shell structure effectively accommodates volume changes during cycling.
- The C/SiOC bilayer enhances sodium-ion diffusion and structural stability.
Takeaway
Scientists made a special battery part that helps it charge faster and last longer by using a clever design that looks like a yolk inside a shell.
Methodology
The Sn@C/SiOC nanohybrid was synthesized using a two-step pyrolysis process from silicone oil and SnO2 precursors.
Limitations
The study does not address the long-term effects of the yolk-shell structure in real-world applications.
Digital Object Identifier (DOI)
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