Multifunctional ultrasmall-MoS2/graphene composites for high sulfur loading Li–S batteries

Tianyu Tang; Teng Zhang; Lina Zhao; Biao Zhang; Wei Li; Junjie Xu; Long Zhang; Hailong Qiu; Yanglong Hou

doi:10.1039/D0QM00082E

Multifunctional ultrasmall-MoS₂/graphene composites for high sulfur loading Li–S batteries†

Tianyu Tang,^a Teng Zhang,^a Lina Zhao,^a Biao Zhang,^a Wei Li,^a Junjie Xu,^a Long Zhang,^a Hailong Qiu^b and Yanglong Hou

*^a

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* Corresponding authors

^a Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKLMMD), Beijing Innovation Center for Engineering Science and Advanced Technology (BIC-ESAT), Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
E-mail: hou@pku.edu.cn

^b Clean Nano Energy Center, State Key Laboratory of Metastable Materials Science and Technology, College of Materials Science and Engineering, Yanshan University, Qinhuangdao 066004, China

Abstract

Combination of sulfur hosts with high sulfur loading content and multifunctional additives which can anchor lithium polysulfides and exhibit catalytic properties for polysulfides is an effective way to improve the performance of Li–S batteries and make them more competitive. Herein, we utilize high specific surface area N-doped graphene materials (NGM) as sulfur hosts with high sulfur loading contents reaching 92 wt%. Meanwhile, small amounts of ultrasmall-MoS₂/graphene composites (MoS₂–G) which can act as multifunctional additives to anchor lithium polysulfides and promote their conversion are added into the cathode. Moreover, the ultrasmall-MoS₂ nanoparticles with (100) surfaces can anchor Li₂S₆ strongly by forming Mo–S bonds with a binding energy of 4.19 eV. With the synergistic effects of the NGM sulfur host and the MoS₂–G multifunctional additives, the Li–S batteries displayed stable cycling performance and good rate capability at high sulfur loading content.

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DOI: https://doi.org/10.1039/D0QM00082E
Article type: Research Article
Submitted: 15 Feb 2020
Accepted: 06 Mar 2020
First published: 06 Mar 2020

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Mater. Chem. Front., 2020,4, 1483-1491

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Multifunctional ultrasmall-MoS₂/graphene composites for high sulfur loading Li–S batteries

T. Tang, T. Zhang, L. Zhao, B. Zhang, W. Li, J. Xu, L. Zhang, H. Qiu and Y. Hou, Mater. Chem. Front., 2020, 4, 1483 DOI: 10.1039/D0QM00082E

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Multifunctional ultrasmall-MoS₂/graphene composites for high sulfur loading Li–S batteries†

Abstract

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Multifunctional ultrasmall-MoS₂/graphene composites for high sulfur loading Li–S batteries

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