Molybdenum carbide nanoparticle-decorated 3D nitrogen-doped carbon flowers as an efficient electrode for high-performance, all-solid-state symmetric supercapacitors

Electrode materials with high electro-catalytic activity and tailored nanostructures are of great importance for high performance energy storage devices. We develop a novel 3D nanostructured electrode with highly stable, and catalytically-active molybdenum carbide nanoparticles decorated on nitrogen...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-06, Vol.748, p.134-144
Main Authors: Samdani, Kunda J., Joh, Dong Woo, Lee, Kang Taek
Format: Article
Language:English
Subjects:
3-D technology
3D nanostructure
All-solid-state supercapacitor
Batteries
Carbides
Carbon
Catalysis
Catalytic activity
Electrochemical analysis
Electrode materials
Electrodes
Energy storage
Flowers
Flux density
Molybdenum
Molybdenum carbide
Nanoparticles
Nanostructured materials
Self-assembly
Solid state
Supercapacitors
Symmetric device
Three dimensional flow
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Summary:Electrode materials with high electro-catalytic activity and tailored nanostructures are of great importance for high performance energy storage devices. We develop a novel 3D nanostructured electrode with highly stable, and catalytically-active molybdenum carbide nanoparticles decorated on nitrogen-doped carbon flowers (Mo2C/NCF). The controlled synthesis of Mo2C/NCF provides a uniform distribution of Mo2C nanoparticles of ∼80 nm on carbon microflowers with a self-assembled petal-like structure. The Mo2C/NCF achieves excellent electrochemical performance, with a specific capacitance of 1250 F/g at the current density of 1 A/g in a liquid electrolyte. A device consisting of all-solid-state symmetric supercapacitors (SSC) that used this novel electrode exhibits a high energy density of 54 Wh/kg along with remarkable cycling stability (100% retention after 5000 cycles). We believe that these results provide a new way for carbide materials to be used in high-performance energy storage devices. [Display omitted] •Nanostructured Mo2C/NCF electrodes are developed via simple reflux reactions.•The Mo2C/NCF achieves an excellent specific capacitance of 1250 F/g at 1 A/g.•An all-solid-state symmetric supercapacitor exhibits an energy density of 54 Wh/kg.•After 5000 cycles, the specific capacitance retention of the Mo2C/NCF is 100%.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.03.139