Journal
ELECTROCHIMICA ACTA
Volume 166, Issue -, Pages 157-162Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.03.089
Keywords
3D hierarchical porous Ni films; nickel hexacyanoferrate; flower-like nanosheets; electrochemical capacitor; current collector
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Funding
- National Natural Science Foundation of China [21203236]
- Guangdong and Shenzhen Innovative Research Team Program [2011D052, KYPT20121228160843692]
- Shenzhen Electronic Packaging Materials Engineering Laboratory [2012-372]
- Shenzhen High Density Electronic Packaging and Device Assembly Key Laboratory [ZDSYS20140509174237196]
- 1000 plan from Chinese Government
- Alexander von Humboldt Foundation
- program for New Century Excellent Talents in University (NCET)
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Nickel hexacyanoferrate (NiHCF) flower-like nanosheets coated three dimensional (3D) hierarchical porous Ni composite films are successfully prepared by the combination of hydrogen-bubble template electro-deposition and electrochemical polymerization methods. The novel 3D porous NiHCF/Ni composite films demonstrate excellent electrochemical performance as binder-free integrated electrodes for supercapacitors in KNO3 neutral electrolyte. Comparing to the NiHCF coated on smooth Ni film, the 3D hierarchical porous NiHCF/Ni film electrodes exhibit about 10 times larger specific capacitance in KNO3 neutral electrolyte. The 3D porous NiHCF/Ni film electrodes also illustrate good long-term stability for about 18,000 charge-discharge cycles. The improvement of electrochemical performance might be ascribed to the large specific area, highly conductive pathway and fast ion diffusion for the flower-like NiHCF nanosheets directly growth on the 3D hierarchical porous interconnected conductive scaffold current collectors. (C) 2015 Elsevier Ltd. All rights reserved.
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