Activated carbon derived from glutinous rice via gamma radiolysis for lithium–sulfur battery cathodes
Although lithium-sulfur batteries (LSBs) have high theoretical capacities (1675 mA h g −1 ), an irreversible charge/discharge process (shuttle effect) due to polysulfide and insulating lithium sulfide (Li 2 S) formation causes the death of battery cells. This study aims to solve the shuttle effect b...
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Veröffentlicht in: | Materials advances 2022-07, Vol.3 (14), p.5807-5812 |
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Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Although lithium-sulfur batteries (LSBs) have high theoretical capacities (1675 mA h g
−1
), an irreversible charge/discharge process (shuttle effect) due to polysulfide and insulating lithium sulfide (Li
2
S) formation causes the death of battery cells. This study aims to solve the shuttle effect by anchoring polysulfide onto porous carbon/sulfur cathodes
via
chemical interactions. The porous activated carbons were derived from glutinous rice (RAC) and were modified through water (RAC-W) or ammonia radiolysis (RAC-N) using a gamma source (25 kGy). The specific capacities of LSBs obtained from RAC-W and RAC-N are >900 mA h g
−1
and they are stable for more than 150 cycles, which is significantly higher than that of unmodified RAC. Furthermore, carbonyl and pyridinic nitrogen moieties formed in RAC-W and RAC-N from gamma radiolysis result in enhanced interactions between polysulfide and the cathode framework. |
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ISSN: | 2633-5409 2633-5409 |
DOI: | 10.1039/D2MA00222A |