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

doi:10.1002/smll.202303015

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Title:	N-Doping Induced Lattice Expansion of 1D Template Confined Ultrathin MoS2 Sheets to Significantly Enhance Lithium Polysulfides Redox Kinetics for Li–S Battery
Authors:	Minzhe Chen, Nan Wang, Wei Zhou, Xiaoyan Zhu, Qikai Wu, Ming-Hsien Lee, Dengke Zhao, Shunlian Ning, Maozhong An, Ligui Li
Date:	2023-08-23
Issue Date:	2024-07-10 12:05:30 (UTC+8)
Publisher:	Wiley-VCH
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.
Relation:	Small 19(48), 2303015
DOI:	10.1002/smll.202303015
Appears in Collections:	[Graduate Institute & Department of Physics] Journal Article

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