Boosting the polysulfides adsorption-catalysis process on carbon nanotube interlayer via a simple polyelectrolyte-assisted strategy for high-performance lithium sulfur batteries

Fan, Xuliang ¹Wang, Yongyin ¹Zeng, Meng ¹He, Huimin ¹Huang, Jianyi ¹Feng, Ziwen ¹Li, Jing ²Liang, Zhongxin ³Zhou, Tao¹

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作者信息

1. Lingnan Normal Univ
2. Univ Macau
3. Univ Houston
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Abstract

The introduction of conductive interlayer is an effective strategy to improve the sulfur utilization and restrict the migration of polysulfides for high-performance Li-S battery. Herein, a multifunctional CNT based interlayer was obtained by a simple polyelectrolyte (PDDA-TFSI) modified method. Due to the electro-positivity of PDDA-TFSI and the electronic coupling between CNT and PDDA-TFSI, the CNT/PDDA-TFSI inter layer exhibits a strong adsorption and effective catalysis towards polysulfides. Furthermore, the continuous CNT network ensures the successful electron transport during the charge-discharge process. As expected, the electrochemical properties of Li-S battery can be promoted significantly with the assistance of CNT/ PDDA-TFSI interlayer. Even after 300 cycles, the CNT/PDDA-TFSI interlayer-based Li-S battery also delivers a higher capacity retention of 79.2%, proceeding Li-S batteries with and without CNT interlayer. This work proves that CNT/PDDA-TFSI film as a multifunctional interlayer has a promising application in advanced Li-S battery. (c) 2021 Elsevier B.V. All rights reserved.

Key words

Carbon nanotube/Polyelectrolyte/Multifunctional interlayer/Lithium sulfur battery/EFFICIENT/BINDER/HOST

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出版年

2022

Journal of Alloys and Compounds

EISCI

ISSN：0925-8388

被引量22

参考文献量56

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