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|Title:||Cationic surfactant-assisted hydrothermal synthesis of few-layer molybdenum disulfide/graphene composites: Microstructure and electrochemical lithium storage|
Electrochemical lithium storage
Few-layer molybdenum disulfide
|Citation:||Ma, L., Huang, G., Chen, W., Wang, Z., Ye, J., Li, H., Chen, D., Lee, J.Y. (2014-10-15). Cationic surfactant-assisted hydrothermal synthesis of few-layer molybdenum disulfide/graphene composites: Microstructure and electrochemical lithium storage. Journal of Power Sources 264 : 262-271. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jpowsour.2014.04.084|
|Abstract:||Few-layer molybdenum disulfide/graphene (FL-MoS2/GNS) composites are fabricated by a facile hydrothermal route and a post-annealing with the assistance of various cationic surfactants (dodecyltrimethylammonium bromide, DTAB; octyltrimethylammonium bromide, OTAB; and tetrabutylammonium bromide, TBAB), which have different alkyl-chain lengths and stereo configurations. The effects of these cationic surfactants on the microstructures and electrochemical performances of the FL-MoS2/GNS for lithium storage are investigated. It is demonstrated the cationic surfactants show some ability to control the microstructure (layer number) of FL-MoS2 in composites. The electrochemical performances of FL-MoS2/GNS composites for lithium storage are greatly improved compared to the bare MoS2. Especially, FL-MoS2/GNS with ∼6 MoS2 layers prepared with the assistance of OTAB exhibits very high reversible capacity of ∼1200 mAh g-1 with excellent cycle stability and enhanced rate capability. Electrochemical impedance spectrum also confirms that the FL-MoS2/GNS composite electrodes exhibit much lower electron-transfer resistance than the MoS2. The remarkable electrochemical performances of FL-MoS 2/GNS composites can be attributed to the synergistic interaction between FL-MoS2 and graphene and their quasi-3D architectures, which promote lithium diffusion, electron transfer and electrolyte access. © 2014 Elsevier B.V. All rights reserved.|
|Source Title:||Journal of Power Sources|
|Appears in Collections:||Staff Publications|
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