Facile Synthesis of S/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> Mxene@Se Cathode for High-Sulfur-Loading Lithium–Sulfur Batteries

Facile Synthesis of S/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> Mxene@Se Cathode for High-Sulfur-Loading Lithium–Sulfur Batteries

Lithium–sulfur batteries (LSBs) are gaining much attention because they offer a much higher theoretical energy density compared to traditional lithium-ion batteries. However, the cycling performance of LSBs with high sulfur mass loading is poor due to the shuttle effect, limiting the practical appli...

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Bibliographic Details
Main Authors: Yupu Shi, Jianbin Xu, Xian Du, Yi Zhang, Fan Zhao, Ziwei Tang, Le Kang, Huiling Du
Format: Article
Language:English
Published: MDPI AG 2024-12-01
Series:Batteries
Subjects:
selenium
Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> Mxene
cathode
lithium–sulfur batteries
high loading
Online Access:https://www.mdpi.com/2313-0105/10/12/430
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Summary:Lithium–sulfur batteries (LSBs) are gaining much attention because they offer a much higher theoretical energy density compared to traditional lithium-ion batteries. However, the cycling performance of LSBs with high sulfur mass loading is poor due to the shuttle effect, limiting the practical application of LSBs. In this work, a unique porous sulfur/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> Mxene@selenium (S/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>@Se) cathode of a LSB is synthesized by a simple hydrothermal method to address these challenges. In this composite, Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> forms a conductive framework and Se is tightly anchored on the framework. The Se inhibits the agglomeration of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> and prevents the collapse of Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>. The S/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>@Se composite can adsorb lithium polysulfides (LiPSs) and suppresses the shuttle effect and volume changes during cycling, improving the cycling stability of LSBs with high S loading. A high capacity of 812.2 mAh g<sup>−1</sup> at 0.1 C with 5.0 mg cm<sup>−2</sup> sulfur mass loading after 100 cycles is obtained. This work could inspire further research into high-performance S host materials for high-S-loading LSBs.
ISSN:2313-0105

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