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Crumpled graphene-encapsulated sulfur for lithium-sulfur batteries
Xianfei Hu1,2, Kaitong Leng1,2, Cuijuan Zhang1,2
1Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University Tianjin 300350 P. R. China.
RSC Advances
|May 11, 2022
Summary
Researchers developed crumpled reduced graphene oxide (crGO) to encapsulate sulfur, enhancing lithium-sulfur batteries. This approach addresses conductivity and shuttling issues for better energy storage and electric vehicles.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Lithium-sulfur batteries offer high theoretical energy density but face challenges.
- Poor electrical conductivity of sulfur and lithium sulfides hinders performance.
- The polysulfide shuttling effect limits cycle life and efficiency.
Purpose of the Study:
- To address the limitations of lithium-sulfur batteries.
- To improve the electrochemical performance of sulfur cathodes.
- To develop a scalable synthesis method for advanced battery materials.
Main Methods:
- Synthesized sulfur encapsulated in crumpled reduced graphene oxide (S@crGO) using a facile one-step in situ method.
- Investigated the structural and chemical properties of S@crGO.
- Evaluated the electrochemical performance of S@crGO as a cathode material for lithium-sulfur batteries.
Main Results:
- The S@crGO composite demonstrated improved electrical conductivity.
- Encapsulation effectively suppressed the polysulfide shuttling effect.
- The S@crGO cathode exhibited high capacity and excellent cycling stability.
Conclusions:
- Crumpled reduced graphene oxide is a promising host material for sulfur.
- The S@crGO cathode offers a viable solution for high-performance lithium-sulfur batteries.
- This scalable synthesis method facilitates practical applications in electric vehicles and grid storage.
