Volume 19, Issue 48 2303015
Research Article

N-Doping Induced Lattice Expansion of 1D Template Confined Ultrathin MoS2 Sheets to Significantly Enhance Lithium Polysulfides Redox Kinetics for Li–S Battery

Minzhe Chen

Minzhe Chen

New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, 382 East Waihuan Road, Guangzhou, 510006 China

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Nan Wang

Nan Wang

Siyuan Laboratory, Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong, 510632 China

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Wei Zhou

Wei Zhou

New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, 382 East Waihuan Road, Guangzhou, 510006 China

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Xiaoyan Zhu

Xiaoyan Zhu

New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, 382 East Waihuan Road, Guangzhou, 510006 China

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Qikai Wu

Qikai Wu

New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, 382 East Waihuan Road, Guangzhou, 510006 China

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Ming-Hsien Lee

Ming-Hsien Lee

Department of Physics, Tamkang University, New Taipei, 25137 Taiwan

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Dengke Zhao

Corresponding Author

Dengke Zhao

School of Materials Science and Engineering, Henan Normal University, Xinxiang, 453007 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Shunlian Ning

Corresponding Author

Shunlian Ning

School of Chemistry, Sun Yat-sen University, Guangzhou, Guangdong, 510275 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Maozhong An

Corresponding Author

Maozhong An

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001 China

State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Ligui Li

Corresponding Author

Ligui Li

New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, 382 East Waihuan Road, Guangzhou, 510006 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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First published: 15 August 2023
Citations: 3

Abstract

Preparing MoS2-based materials with reasonable structure and catalytic activity to enhance the sluggish kinetics of lithium polysulfides (LiPSs) conversion is of great significance for Li–S batteries (LSBs) but still remain a challenge. Hence, hollow nanotubes composed of N-doped ultrathin MoS2 nanosheets (N-MoS2 NHTs) are fabricated as efficient S hosts for LSBs by using CdS nanorods as a sacrifice template. Characterization and theoretical results show that the template effectively inhibits the excessive growth of MoS2 sheets, and N doping expands the interlayer spacing and modulates the electronic structure, thus accelerating the mass/electron transfer and enhancing the LiPSs adsorption and transformation. Benefiting from the merits, the N-MoS2 NHTs@S cathode exhibits an excellent initial capacity of 887.8 mAh g−1 and stable cycling performances with capacity fading of only 0.0436% per cycle at 1.0 C (500 cycles). Moreover, even at high S loading that of 7.5 mg cm−2, the N-MoS2 NHTs@S cathode also presents initial excellent areal capacity of 7.80 mAh cm−2 at 0.2 C. This study offers feasible guidance for designing advanced MoS2-based cathode materials in LSBs.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.