Activated carbon derived from glutinous rice via gamma radiolysis for lithium–sulfur battery cathodes

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
Hauptverfasser: Anantachaisilp, Suranan, Limmeechokchai, Passavorn, Sirilapyanonth, Kanok, Moungsombat, Sukpawat, Kaenket, Surasak, Utapong, Teerawat, Kwamman, Tanagorn
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container_end_page 5812
container_issue 14
container_start_page 5807
container_title Materials advances
container_volume 3
creator Anantachaisilp, Suranan
Limmeechokchai, Passavorn
Sirilapyanonth, Kanok
Moungsombat, Sukpawat
Kaenket, Surasak
Utapong, Teerawat
Kwamman, Tanagorn
description 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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title Activated carbon derived from glutinous rice via gamma radiolysis for lithium–sulfur battery cathodes
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