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

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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.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2018-06
Language
English
Article Type
Article
Citation

Journal of Alloys and Compounds, v.748, pp.134 - 144

ISSN
0925-8388
DOI
10.1016/j.jallcom.2018.03.139
URI
http://hdl.handle.net/10203/272671
Appears in Collection
ME-Journal Papers(저널논문)
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