Rational engineering yolk-shell InS@void@carbon hybrid as polysulfide-absorbable sulfur host for high-performance lithium-sulfur batteries.

Dalton Trans

Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Provincial Engineering Laboratory of New-Energy Vehicle Battery Energy-Storage Materials, Anhui Key Laboratory of Molecule-Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, PR China.

Published: August 2023

The slow redox kinetics and shuttling behavior of the intermediate lithium polysulfides constrain the further development of lithium-sulfur (Li-S) electrochemistry. A yolk-shell InS@void@carbon hybrid engineered to host the sulfur for Li-S batteries is prepared by using a multi-layered assembly method. The InS/electrolyte interface acted as powerful adsorption and activation sites for soluble polysulfides, which is demonstrated using density functional theory (DFT) calculations. Moreover, the carbon shell provides redundancy for volume-changes during the cycles. The results indicate that yolk-shell InS@S@C hybrid cathode shows good reversibility and rate capability, which preserves 563.6 mA h g after 500 cycles at 0.5 C, indicating the potential for developing high-performance battery systems.

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http://dx.doi.org/10.1039/d3dt01300fDOI Listing

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