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journal article·2023-11Open access

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, Nan Wang, Wei Zhou, Xiaoyan Zhu, Qikai Wu, Ming‐Hsien Lee, Dengke Zhao, Shunlian Ning, Maozhong An, Ligui Li

Small· Volume 19· Issue 48
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Abstract

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.
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Research context

Energy storageNanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

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

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

Department of Physics Tamkang University New Taipei 25137 Taiwan

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

School of Chemistry Sun Yat‐sen University Guangzhou Guangdong 510275 China

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

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · Postdoctoral Research Foundation of China

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