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Microporous Carbon Nanoparticles for Lithium-Sulfur Batteries
Hui-Ju Kang1, Gazi A K M Rafiqul Bari1, Tae-Gyu Lee1
1Department of Advanced Chemicals & Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Korea.
Nanomaterials (Basel, Switzerland)
|October 15, 2020
Summary
Researchers developed a new porous carbon material for rechargeable lithium-sulfur batteries. This advanced material effectively prevents polysulfide shuttling, enabling high-capacity energy storage with excellent cycle stability.
Area of Science:
- Electrochemistry
- Materials Science
- Energy Storage
Background:
- Rechargeable lithium-sulfur batteries (LSBs) offer high energy density and low cost but suffer from polysulfide shuttling.
- Porous carbon materials are investigated as sulfur hosts to mitigate polysulfide shuttling and improve conductivity.
Purpose of the Study:
- To develop a scalable and efficient synthesis method for a novel porous carbon framework for LSBs.
- To evaluate the performance of the synthesized porous carbon as a sulfur host material in LSBs.
Main Methods:
- A one-step salt templating method using a LiI-KI eutectic mixture at 800 °C in an inert atmosphere.
- Fabrication of a porous carbon framework with interconnected micropores and mesopores.
- Electrochemical testing of the porous carbon as a sulfur host in LSBs with a sulfur loading of 2 mg cm-2.
Main Results:
- The synthesized porous carbon exhibited excellent electrical conductivity, effectively suppressing polysulfide shuttling.
- The LSBs utilizing this host material achieved a high capacity of 780 mAh g-1 at 500 mA g-1.
- The electrode demonstrated remarkable stability with a low capacity loss of 0.36% per cycle over 100 cycles.
Conclusions:
- The developed one-step synthesis method provides a viable route for creating advanced porous carbon structures.
- This unique porous carbon framework shows significant potential for high-capacity and stable electrochemical energy storage in LSBs.
