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Issue 48, 2020
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A TiS2/Celgard separator as an efficient polysulfide shuttling inhibitor for high-performance lithium–sulfur batteries

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Abstract

The rapid capacity loss caused by the shuttling effect of polysulfides is one of the great challenges of Li–S batteries. In this work, we adopted a simple solid-phase sintering method to synthesize titanium disulfide (TiS2) and further demonstrated it as a superior modifier of separators for Li–S batteries. Two commonly adopted modification processes of separators, including vacuum filtration (VF) and slurry casting (SC) have been used to prepare TiS2/Celgard separators. TiS2-VF/Celgard can better restrain the polysulfide shuttling effect compared with TiS2-SC/Celgard. A TiS2-VF/Celgard-based Li–S battery has a reversible capacity of 771.6 mA h g−1, with a capacity retention of 645.6 mA h g−1 after 500 cycles at 2.0 C, corresponding to a capacity fading rate of ∼0.033% per cycle. This study has shown the potential of TiS2 as a multifunctional modifier of separators for high performance and long cycle life Li–S batteries.

Graphical abstract: A TiS2/Celgard separator as an efficient polysulfide shuttling inhibitor for high-performance lithium–sulfur batteries

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Supplementary files

Article information


Submitted
06 Sep 2020
Accepted
26 Sep 2020
First published
28 Sep 2020

Nanoscale, 2020,12, 24368-24375
Article type
Paper

A TiS2/Celgard separator as an efficient polysulfide shuttling inhibitor for high-performance lithium–sulfur batteries

G. Yan, C. Xu, Z. Meng, M. Hou, W. Yan, N. Lin, L. Lai and D. Zhan, Nanoscale, 2020, 12, 24368
DOI: 10.1039/D0NR06429G

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