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Recent advances on separators to mitigate technical challenges associated with re-chargeable lithium sulfur batteries.

Abstract

Lithium sulfur battery (LSB) research has received considerable attention due to the high theoretical gravimetric energy density of LSBs in comparison to lithium ion battery (LIB). However, in practice, the active sulfur material is required to be coupled with a conducting material due to the poor electronic conductivity (5×10-30 S cm-1) and its solid discharge products (Li2S2/Li2S) – reducing the battery energy density. Furthermore, the lithium polysulfides (PSs), formed as soluble intermediate phases, can shuttle between the cathode and the anode – leading to rapid capacity degradation. Coating the traditional separators is one way to mitigate the shuttle effect which requires proper understanding the nature of PS to design an effective separators coating materials. In this review, the background with technical limitations of LSBs have been introduced in line with the detailed information of PS dimensions. Subsequently, three different materials such as carbon, polymer and inorganic have been highlighted with their significant contributions to LSBs performance. A particular focus has been given on their mechanisms to trap PS through polar polar, lewis acid based interactions and physical confinement, unique cell architectures and overall performances of the LSBs. Finally, the key factors which influence the LSBs performances are summarized

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Publication details

The article was received on 14 Dec 2018, accepted on 07 Feb 2019 and first published on 11 Feb 2019


Article type: Review Article
DOI: 10.1039/C8TA12066H
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    Recent advances on separators to mitigate technical challenges associated with re-chargeable lithium sulfur batteries.

    M. M. Rana, M. Li, X. Huang, B. Luo, I. Gentle and R. Knibbe, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C8TA12066H

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