Spray pyrolysis-derived W-doped MoSe2/rGO paper-like microspheres:optimization of microstructure and mesostructure for enhanced lithium storage

Wei Wang ¹Jun-Yu Chen ¹Jie Ouyang ²Hong Yin ³Ao-Jie Li ¹Liang Chen ¹Jun-Lin Huang ¹Yu-Can Zhu ¹Gang-Yong Li ⁴Zhao-Hui Hou¹

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作者信息

1. Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials,Hunan Institute of Science and Technology,Yueyang 414006,China;School of Chemistry and Chemical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China
2. Hunan Province Key Laboratory of Materials Surface &Interface Science and Technology,Material Science and Engineering School,Central South University of Forestry and Technology,Changsha 410004,China
3. Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials,Hunan Institute of Science and Technology,Yueyang 414006,China;School of Chemistry and Chemical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China;International Iberian Nanotechnology Laboratory(INL),Av.Mestre Jose Veiga,4715-330 Braga,Portugal
4. Key Laboratory of Hunan Province for Advanced Carbon-based Functional Materials,Hunan Institute of Science and Technology,Yueyang 414006,China
折叠

Abstract

Two-dimensional MoSe2 is a promising candi-date for lithium-ion battery anodes.However,its conduc-tivity and lithium storage volumetric effect still need to be optimized.In this work,W-doped MoSe2/rGO paper-like microspheres are successfully prepared through ultrasonic spray pyrolysis,achieving optimization at both the microstructure and mesostructure to enhance the lithium storage performance of the material.Firstly,by utilizing the similar two-dimensional structure between MoSe2 and rGO,self-assembly is achieved through spray pyrolysis,resulting in a well-defined van der Waals heterostructure at the interface on the microscale,enhancing the electron and ion transfer capability of the composite.Secondly,the mesoscale paper-like microsphere morphology provides additional volume expansion buffering space.Moreover,W-doping not only increases the interlayer spacing of MoSe2(0.73 nm),thereby reducing the diffusion resistance of Li+,but also allow for the modulation of the energy band structure of the material.Density functional theory(DFT)calculations confirm that W-doped MoSe2/rGO exhibits the narrowest bandgap(0.892 eV).Therefore,the composite demonstrates excellent lithium storage perfor-mance,maintaining a specific capacity of 732.9 mAh·g-1 after 300 cycles at a current density of 1 A·g-1.

Key words

Molybdenum selenide/Heterostructure/Microspheres/Li-ion batteries/Kinetics

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基金项目

National Natural Science Foundation of China(52171207)

National Natural Science Foundation of China(52104301)

National Natural Science Foundation of China(52271211)

National Natural Science Foundation of China(52204311)

Natural Science Foundation of Hunan Province(2023JJ30280)

Natural Science Foundation of Hunan Province(2023JJ30277)

Natural Science Foundation of Hunan Province(2022JJ40162)

Science and Technology Innovation Program of Hunan Province(2022RC3037)

Science & Technology talents lifting project of Hunan Province(2022TJ-N16)

Scientific Research Fund of Hunan Provincial Education Department(21B0591)

Scientific Research Fund of Hunan Provincial Education Department(22A0474)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量4

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