Mixed‐phase MoS 2 decorated reduced graphene oxide hybrid composites for efficient symmetric supercapacitors
- 28 January 2021
- journal article
- research article
- Published by Hindawi Limited in International Journal of Energy Research
- Vol. 45 (6), 9193-9209
- https://doi.org/10.1002/er.6448
Abstract
In this work, we demonstrated the phase‐tuned MoS2 layers (2H‐ MoS2, 1 T‐ MoS2, and 2H/1 T‐MoS2) using a one‐pot reaction, scientifically significant due to their impermeable characteristics. Strongly‐bonded, vertically‐aligned layers were perceived by transmission electron microscopy (TEM) for 2H/1 T‐MoS2 layers. The spacing between the two layers was expanded to 0.67 nm, which is favorable for intercalation process. Further, mixed‐phase MoS2 sheets were successively blended with reduced graphene oxide (rGO) to form 2H/1 T‐MoS2@rGO hybrid. Spectroscopic studies verified the formation of phase‐tuned MoS2 and 2H/1 T‐MoS2@rGO hybrid. The resulting 2H/1 T‐MoS2@rGO hybrid TEM micrograph shows the layered MoS2 lattices decorated rGO nano‐structure. Symmetric supercapacitors constructed from 2H/1 T‐MoS2@rGO hybrid electrodes demonstrated improved storage capacity with solid pseudo‐capacitive behavior compared to the pure phases. Surface‐modified 2H/1 T‐MoS2@rGO nanostructures exhibited a high energy density of 55 Wh·kg−1 at a power density of 3 kW·kg−1 with a symmetric capacitance of 275 F·g−1 at a current density of 1 A·g−1, along with an excellent cyclic constancy (~97% capacity after 5000 cycles).Keywords
Funding Information
- Dongguk University (S‐2020‐G0001‐00023)
- National Research Foundation of Korea (2019R1A2C2086747)
This publication has 64 references indexed in Scilit:
- Phase boundary engineering of metal-organic-framework-derived carbonaceous nickel selenides for sodium-ion batteriesNano Research, 2020
- Engineering the novel MoSe2-Mo2C hybrid nanoarray electrodes for energy storage and water splitting applicationsApplied Catalysis B: Environment and Energy, 2020
- Public perceptions of and responses to new energy technologiesNature Energy, 2019
- Construction of ultrafine ZnSe nanoparticles on/in amorphous carbon hollow nanospheres with high-power-density sodium storageNano Energy, 2019
- Oxygen vacancy-enriched MoO3−x nanobelts for asymmetric supercapacitors with excellent room/low temperature performanceJournal of Materials Chemistry A, 2019
- One-pot facile methodology to synthesize MoS2-graphene hybrid nanocomposites for supercapacitors with improved electrochemical capacitanceComposites Part B: Engineering, 2019
- V2O5 and its Carbon‐Based Nanocomposites for Supercapacitor ApplicationsChemElectroChem, 2018
- Facile method to synthesis hybrid phase 1T@2H MoSe2 nanostructures for rechargeable lithium ion batteriesJournal of Electroanalytical Chemistry, 2018
- Latest advances in supercapacitors: from new electrode materials to novel device designsChemical Society Reviews, 2017
- Nature‐Inspired Electrochemical Energy‐Storage Materials and DevicesAdvanced Energy Materials, 2016