Acetylene black interlayer regulated sulfur deposition for lithium-sulfur batteries with high utilization and long-term life

Men, Xinliang; Deng, Teng; Jiao, Xuechao; Qu, Laitao; Wen, Kaining; Che, Jiangxuan; Chen, Liping; Li, Sen; Wang, Juan

doi:10.1016/j.electacta.2022.141100

Cited by 4 publications

(1 citation statement)

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“…Similarly, the acetylene black interlayer can also regulate the uniform nucleation and deposition of solid-phase polysulfides without increasing the impedance of the battery. [231] That is, for materials with favorable electrical conductivity and pore size smaller than the polysulfides, the trace deposition of polysulfides would not affect the mass transfer in the battery. In contrast, for poorly conductive carbon materials, the deposition of polysulfides can hinder the path of Li + transport and increase the impedance of the battery.…”

Section: Size Effect In Interlayersmentioning

confidence: 99%

Size Effect for Inhibiting Polysulfides Shuttle in Lithium‐Sulfur Batteries

Kang,

He,

Zou

et al. 2023

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It is undeniable that the dissolution of polysulfides is beneficial in speeding up the conversion rate of sulfur in electrochemical reactions. But it also brings the bothersome “shuttle effect”. Therefore, if polysulfides can be retained on the cathode side, the efficient utilization of the polysulfides can be guaranteed to achieve the excellent performance of lithium‐sulfur batteries. Based on this idea, considerable methods have been developed to inhibit the shuttling of polysulfides. It is necessary to emphasize that no matter which method is used, the solvation mechanism, and existence forms of polysulfides are essential to analyze. Especially, it is important to clarify the sizes of different forms of polysulfides when using the size effect to inhibit the shuttling of polysulfides. In this review, a comprehensive summary and in‐depth discussion of the solvation mechanism, the existing forms of polysulfides, and the influencing factors affecting polysulfides species are presented. Meanwhile, the size of diverse polysulfide species is sorted out for the first time. Depending on the size of polysulfides, tactics of using size effect in cathode, separator, and interlayer parts are elaborated. Finally, a design idea of materials pore size is proposed to satisfy the use of size effect to inhibit polysulfides shuttle.

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Section: Size Effect In Interlayersmentioning

confidence: 99%