Journal
JOURNAL OF POWER SOURCES
Volume 243, Issue -, Pages 317-322Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2013.05.165
Keywords
Titanium dioxide; Nickel oxide; Core/shell; Supercapacitors; Nanorods array
Funding
- Zhejiang Provincial Natural Science Foundation of China [Y4110628]
- National Natural Science Foundation of China [51204116]
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High-quality metal oxides hetero-structured nanoarrays have been receiving great attention in electrochemical energy storage application. Self-supported Tio(2)/NiO core/shell nanorod arrays are prepared on carbon cloth via the combination of hydrothermal synthesis and electro-deposition methods. The obtained core/shell nanorods consist of nanorod core and interconnected nanoflake shell, as well as hierarchical porosity. As cathode materials for pseudo-capacitors, the Tio(2)/NiO core/shell nanorod arrays display impressive electrochemical performances with both high capacitance of 611 F g(-1) at 2 A g(-1), and pretty good cycling stability with a retention of 89% after 5000 cycles. Besides, as compared to the single NiO nanoflake arrays on carbon cloth, the Tio(2)/NiO core/shell nanorod arrays exhibit much better electrochemical properties with higher capacitance, better electrochemical activity and cycling life. This enhanced performance is mainly due to the core/shell nanorods architecture offering fast ion/electron transfer and sufficient contact between active materials and electrolyte. (C) 2013 Elsevier B.V. All rights reserved.
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