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Core-branched CoSe2/Ni0.85Se nanotube arrays on Ni foam with remarkable electrochemical performance for hybrid supercapacitors
- Source :
- Journal of Materials Chemistry A. 6:19151-19158
- Publication Year :
- 2018
- Publisher :
- Royal Society of Chemistry (RSC), 2018.
-
Abstract
- Nanotube arrays have shown great potential in a variety of important applications, such as hybrid supercapacitors. In order to endow nanotubes with multifunctionality, rationally designed and fabricated nanotube arrays with controllable structures are highly desired, but still remain a great challenge. Herein, we report a facile synthesis strategy for core-branched CoSe2/Ni0.85Se nanotube arrays directly on Ni foam by simply selenizing Co-precursor nanowires for hybrid supercapacitors. This structure design could not only ensure the intimate contact of self-branched heterostructures, but also offer sufficient active sites for electrochemical reactions. Further, we propose an electrochemical activation strategy to fully boost the electrochemical performance of CoSe2/Ni0.85Se nanotube arrays. After electrochemical activation, CoSe2/Ni0.85Se nanotube arrays have been changed into porous CoOOH/NiOOH, accounting for the remarkable performance. Contributed to by short ion diffusion paths, large electroactive sites and low contact resistance, the CoSe2/Ni0.85Se electrode after electrochemical activation shows remarkable performance for hybrid supercapacitors.
- Subjects :
- Supercapacitor
Nanotube
Materials science
Renewable Energy, Sustainability and the Environment
Contact resistance
Nanowire
Nanotechnology
Heterojunction
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Electrode
General Materials Science
0210 nano-technology
Porosity
Subjects
Details
- ISSN :
- 20507496 and 20507488
- Volume :
- 6
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry A
- Accession number :
- edsair.doi...........5d6802845e054a211463a99fb6eeb70e