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Unraveling the Operation Mechanisms of Lithium Sulfur Batteries with Ultramicroporous Carbons

Abstract : Quasi-solid-state lithium sulfur batteries (QSS-LSBs) constitute a new type of lithium sulfur batteries having a cathode usually based on ultramicroporous carbon and presenting only one voltage plateau in their discharge profile. As the discharge of QSS-LSBs does not involve polysulfide dissolution, shuttle effects can be suppressed in this system. Here, we report a kinetic model to simulate the discharge process of QSS-LSB based on a two-step reaction mechanism. The simulation results well reproduce the one-plateau discharge profile and reveal that the high Li+ transport resistivity of Li2S and Li2S2 is the key capacity-limiting factor.
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https://hal-u-picardie.archives-ouvertes.fr/hal-03611042
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Soumis le : mercredi 16 mars 2022 - 18:18:07
Dernière modification le : mardi 27 septembre 2022 - 04:21:23

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Yinghui Yin, Alejandro A. Franco. Unraveling the Operation Mechanisms of Lithium Sulfur Batteries with Ultramicroporous Carbons. ACS Applied Energy Materials, ACS, 2018, 1 (11), pp.5816-5821. ⟨10.1021/acsaem.8b01159⟩. ⟨hal-03611042⟩

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