Electrochemical and Pseudocapacitive Analysis of Rod-Like MoO2@MoSe2@NC Heterostructures for High-Performance Lithium Ion Batteries
来源期刊：Acta Metallurgica Sinica2021年第3期
论文作者：Zhaoxia Qin Xinlong Liu Zhiyin Huang Rui Sun Zhiyong Li Haosen Fan Shengjun Lu
文章页码：425 - 434
摘 要：A micro-scale rod-like heterostructure derived from molybdenum-based metal organic framework（Mo-MOF） has been successfully prepared via subsequent annealing treatment,which assembled from N-doped carbon encapsulated MoSe2 nanosheets grown on the surface of MoO2 microrod（named as MoO2@MoSe2@NC）.For this novel heterostructure,the MoO2 nanoparticles assembled into rod core not only serve as supporting substrate for facilitating the fast kinetics of Li+cations inside the electrode but also protect the MoSe2 structure from restacking in the charge/discharge process.Moreover,the outer-layered MoSe2 nanosheets enable the fast lithium ion movement owing to its large interlayer spacing.Moreover,this unique rod-like core-shell structure composite could further effectively alleviate the structural strains caused by large volume expansion during charge/discharge process,thus leading to stable electrochemical performance when evaluated as anode material for lithium ion batteries.Electrochemical testing exhibits that the MoO2@MoSe2@NC heterostructure presents highly reversible capacity of 468 mAh g-1 at 0.5 A g-1 and superior rate capability(318 mAh g-1 even at 5.0 A g-1),which is attributed to the synergistic effect of N-doped carbon encapsulated MoSe2 nanosheets and MoO2 nanoparticles.
Zhaoxia Qin1,2，Xinlong Liu2，Zhiyin Huang2，Rui Sun1,2，Zhiyong Li1,2，Haosen Fan2，Shengjun Lu1
1. College of Materials Science and Metallurgy Engineering,Guizhou University2. School of Chemistry and Chemical Engineering,Guangzhou University
摘 要：A micro-scale rod-like heterostructure derived from molybdenum-based metal organic framework（Mo-MOF） has been successfully prepared via subsequent annealing treatment,which assembled from N-doped carbon encapsulated MoSe2 nanosheets grown on the surface of MoO2 microrod（named as MoO2@MoSe2@NC）.For this novel heterostructure,the MoO2 nanoparticles assembled into rod core not only serve as supporting substrate for facilitating the fast kinetics of Li+cations inside the electrode but also protect the MoSe2 structure from restacking in the charge/discharge process.Moreover,the outer-layered MoSe2 nanosheets enable the fast lithium ion movement owing to its large interlayer spacing.Moreover,this unique rod-like core-shell structure composite could further effectively alleviate the structural strains caused by large volume expansion during charge/discharge process,thus leading to stable electrochemical performance when evaluated as anode material for lithium ion batteries.Electrochemical testing exhibits that the MoO2@MoSe2@NC heterostructure presents highly reversible capacity of 468 mAh g-1 at 0.5 A g-1 and superior rate capability(318 mAh g-1 even at 5.0 A g-1),which is attributed to the synergistic effect of N-doped carbon encapsulated MoSe2 nanosheets and MoO2 nanoparticles.
关键词：
