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

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

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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.

Molybdenum selenideHeterostructureMicrospheresLi-ion batteriesKinetics

Wei Wang、Jun-Yu Chen、Jie Ouyang、Hong Yin、Ao-Jie Li、Liang Chen、Jun-Lin Huang、Yu-Can Zhu、Gang-Yong Li、Zhao-Hui Hou

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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

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

International Iberian Nanotechnology Laboratory(INL),Av.Mestre Jose Veiga,4715-330 Braga,Portugal

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hunan ProvinceNatural Science Foundation of Hunan ProvinceNatural Science Foundation of Hunan ProvinceScience and Technology Innovation Program of Hunan ProvinceScience & Technology talents lifting project of Hunan ProvinceScientific Research Fund of Hunan Provincial Education DepartmentScientific Research Fund of Hunan Provincial Education Department

521712075210430152271211522043112023JJ302802023JJ302772022JJ401622022RC30372022TJ-N1621B059122A0474

2024

10.1007/s12598-024-02662-4

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
年,卷(期)：2024.43(7)
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