Abstract: MoS2 with different morphologies were synthesized via hydrothermal method by using different types of surfactants (CTAB, SDBS or PVP), and ammonium molybdate and thiourea as molybdenum and sulfur sources, respectively. The characterization for microstructure and morphology of the products by XRD, Raman, SEM and TEM showed that the shape and size of MoS2 could be controlled by altering the surfactants in the reaction system. Electrochemical performance determinations, including cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS), indicated that the shape and size of MoS2 had a remarkable influence on its capacitive performance. The MoS2 nanosheets synthesized with the presence of SDBS possessed a high specific capacitance of 221.2 F/g and a stable capacitance retention of 148 F/g after 500 cycles at a current density of 1 A/g, suggesting good cycling stability. Therefore, the MoS2 nanosheets will be a suitable candidate for electrochemical supercapacitor applications.
1 Lu X, Zhai T, Zhang X, et al. WO3-x@Au@MnO2 core-shell nanowires on carbon fabric for high-performance flexible superca-pacitors[J]. Adv Mater,2012,24(7):938. 2 Simon P, Gogotsi Y. Materials for electrochemical capacitors[J]. Nat Mater,2008,7(11):845. 3 Huang K J, Zhang J Z, Shi G W, et al. Hydrothermal synthesis of molybdenum disulfide nanosheets as supercapacitors electrode material[J]. Electrochim Acta,2014,132:397. 4 Shi J, Li X, He G, et al. Electrodeposition of high-capacitance 3D CoS/graphene nanosheets on nickel foam for high-performance aqueous asymmetric supercapacitors[J]. J Mater Chem A,2015, 3(41):20619. 5 Tu C C, Lin L Y, Xiao B C, et al. Highly efficient supercapacitor electrode with two-dimensional tungsten disulfide and reduced graphene oxide hybrid nanosheets[J]. J Power Sources,2016,320:78. 6 Xu L M, Ma L, Xu X Y, et al. Molybdenum disulfide microflowers assembled by few-layered nanosheets and their electrochemical performance for supercapacitor[J]. Mater Lett,2016,173:84. 7 Hu K H, Hu X G, Xu Y F, et al. Synthesis of nano-MoS2/TiO2 composite and its catalytic degradation effect on methyl orange[J]. J Mater Sci,2010,45(10):2640. 8 Radisavljevic B, Radenovic A, Brivio J, et al. Single-layer MoS2 transistors[J]. Nat Nanotechnol,2011,6(3): 147. 9 Hwang H, Kim H, Cho J. MoS2 nanoplates consisting of disordered graphene-like layers for high rate lithium battery anode materials[J]. Nano Lett,2011,11(11):4826. 10 Ramadoss A, Kim T, Kim G S, et al. Enhanced activity of a hydrothermally synthesized mesoporous MoS2 nanostructure for high performance supercapacitor applications[J]. New J Chem,2014,38(6):2379. 11 Xiao J, Choi D, Cosimbescu L, et al. Exfoliated MoS2 nanocompo-site as an anode material for lithium ion batteries[J]. Chem Mater,2010,22(16):4522 12 Mdleleni M M, Hyeon T, Suslick K S. Sonochemical synthesis of nanostructured molybdenum sulfide[J]. J Am Chem Soc,1998,120(24):6189. 13 Feldman Y, Wasserman E, Srolovitz D J, et al. High-rate, gas-phase growth of MoS2 nested inorganic fullerenes and nanotubes[J]. Science,1995,267(5195):222 14 Zelenski C M, Dorhout P K. Template synthesis of near-monodisperse microscale nanofibers and nanotubules of MoS2[J]. J Am Chem Soc,1998,120(4):734. 15 Tang G, Wang Y, Chen W, et al. Hydrothermal synthesis and cha-racterization of novel flowerlike MoS2 hollow microspheres[J]. Mater Lett,2013,100:15. 16 Tian Y, Zhao J, Fu W, et al. A facile route to synthesis of MoS2 nanorods[J]. Mater lett,2005,59(27):3452. 17 Nagaraju G, Tharamani C N, Chandrappa G T, et al. Hydrothermal synthesis of amorphous MoS2 nanofiber bundles via acidification of ammonium heptamolybdate tetrahydrate[J]. Nanosc Res Lett,2007,2(9):461 18 Ma L, Huang G, Chen W, et al. Cationic surfactant-assisted hydrothermal synthesis of few-layer molybdenum disulfide/graphene composites: Microstructure and electrochemical lithium storage[J]. J Power Sources,2014,264(1):262. 19 Wang X, Zhang Z, Chen Y, et al. Morphology-controlled synthesis of MoS2 nanostructures with different lithium storage properties[J]. J Alloys Compd,2014,600:84. 20 Pandey K, Yadav P, Mukhopadhyay I. Electrochemical and electronic properties of flower-like MoS2 nanostructures in aqueous and ionic liquid media[J]. RSC Adv,2015,5(71):57943. 21 Krishnamoorthy K, Veerasubramani G K, Radhakrishnan S, et al. Supercapacitive properties of hydrothermally synthesized sphere like MoS2 nanostructures[J]. Mater Res Bull,2014,50:499. 22 Du X, Guo P, Song H, et al. Graphene nanosheets as electrode material for electric double-layer capacitors[J]. Electrochim Acta,2010,55(16):4812.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2017, Vol. 31 
