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Porous Hybrid Composites of Few‐Layer MoS 2 Nanosheets Embedded in a Carbon Matrix with an Excellent Supercapacitor Electrode Performance
Author(s) -
Ji Hongmei,
Liu Chao,
Wang Ting,
Chen Jing,
Mao Zhengning,
Zhao Jin,
Hou Wenhua,
Yang Gang
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201502355
Subject(s) - supercapacitor , materials science , electrode , sbus , capacitance , chemical engineering , electrochemistry , annealing (glass) , nanocomposite , nanotechnology , composite material , metal organic framework , organic chemistry , chemistry , adsorption , engineering
Porous hierarchical architectures of few‐layer MoS 2 nanosheets dispersed in carbon matrix are prepared by a microwave‐hydrothermal method followed by annealing treatment via using glucose as C source and structure‐directing agent and (NH 4 ) 2 MoS 4 as both Mo and S sources. It is found that the morphology and size of the secondary building units (SBUs), the size and layer number of MoS 2 nanosheets as well as the distribution of MoS 2 nanosheets in carbon matrix, can be effectively controlled by simply adjusting the molar ratio of (NH 4 ) 2 MoS 4 to glucose, leading to the materials with a low charge–transfer resistance, many electrochemical active sites and a robust structure for an outstanding energy storage performance including a high specific capacitance (589 F g −1 at 0.5 A g −1 ), a good rate capability (364 F g −1 at 20 A g −1 ), and an excellent cycling stability (retention 104% after 2000 cycles) for application in supercapacitors. The exceptional rate capability endows the electrode with a high energy density of 72.7 Wh kg −1 and a high power density of 12.0 kW kg −1 simultaneously. This work presents a facile and scalable approach for synthesizing novel heterostructures of MoS 2 ‐based electrode materials with an enhanced rate capability and cyclability for potential application in supercapacitor.