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Abstract:
Molybdenum disulfide (MoS2), has aroused people's much research interest as an anode candidate for next generation of Li-ion batteries because of special layered structure and high theoretical capacity. However, MoS2 suffers from a poor cycling stability and an inferior rate capability upon charge/discharge processes. So we have successfully synthesized a more stable expanded nanocomposite with superior electrical conductivity by intercalating moderate amorphous carbon between two adjacent S-Mo-S interlayer via a simple method which exhibits excellent lithium storage performance with high capacity (858.9 mA h g(-1) at 1 A g(-1) for 1000 cycles), and superior rate capability (518 mA h g(-1) at 4 A g(-1)). This superior electrochemical performance is attributed to the special structure (few layers, 2H phase, expanded interlayer spacing, amorphous carbon between S-Mo-S layers, C-O-Mo bond in the layer), small size and evenly distributed MoS2 nanosheets. Besides, we study the 2H-1T phase transformation mechanism by controlling the ratio of ethylene glycol to water and O-C=O bond plays an important role in promoting 2H-1T phase transformation. (C) 2019 Elsevier B.V. All rights reserved.
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JOURNAL OF ALLOYS AND COMPOUNDS
ISSN: 0925-8388
Year: 2019
Volume: 810
4 . 6 5
JCR@2019
5 . 3 1 6
JCR@2020
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:131
JCR Journal Grade:2
CAS Journal Grade:1
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