Facile synthesis of hybrid MoS2/graphene nanosheets as high-performance anode for sodium-ion batteries

• Published in: Ionics Vol. 26; no. 2; pp. 711 - 717
• Main Authors: Zhang, Rong, Wang, Jinkai, Li, Chao, Liu, Ting, Yao, Tianhao, Zhu, Lei, Han, Xiaogang, Wang, Hongkang
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.02.2020; Springer Nature B.V
• Subjects: Ammonium molybdate; Anodes; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrical resistivity; Electrochemistry; Electrode materials; Electrodes; Energy Storage; Graphene; Molybdenum disulfide; Nanosheets; Optical and Electronic Materials; Original Paper; Rechargeable batteries; Renewable and Green Energy; Sodium-ion batteries; Thermal decomposition; MoS; Pyrolysis; Graphene; Sodium-ion batteries
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-019-03235-7

We report the facile synthesis of molybdenum disulfide (MoS 2 ) nanosheets on graphene nanosheets (MoS 2 @GNSs) via simple thermal decomposition of ammonium tetrathiomolybdate in Ar-H 2 atmosphere. When used as anode materials for sodium-ion batteries (SIBs), the as-prepared MoS 2 @GNSs electrode delivers reversible capacities of 389 and 383 mA h g −1 at current densities of 200 mA g −1 and 500 mA g −1 after 200 cycles, respectively, which is much higher than that of the MoS 2 electrode (253 mA h g −1 after 171 cycles at 200 mA g −1 ). The superior sodium storage performance of MoS 2 @GNSs including excellent cycle stability and rate performance can be attributed to the introduction of graphene materials, which not only buffer the volume changes of MoS 2 upon sodiation/desodiation but also improve the electrical conductivity.