Journal
NANO LETTERS
Volume 14, Issue 2, Pages 831-838Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl404199v
Keywords
Supercapacitors; NiCo2S4 nanotube arrays; three-dimensional scaffold; core-shell nanostructure; pseudocapacitive materials
Categories
Funding
- HK-RGC General Research Funds (GRF) [HKUST 605710, 604809]
- Fundamental Research Funds for the Central Universities [2013QN158]
- Research Fund for the Doctoral Program of Higher Education of China [20130142120024]
Ask authors/readers for more resources
We report on the development of highly conductive NiCo2S4 single crystalline nanotube arrays grown on a flexible carbon fiber paper (CFP), which can serve not only as a good pseudocapacitive material but also as a three-dimensional (3D) conductive scaffold for loading additional electroactive materials. The resulting pseudocapacitive electrode is found to be superior to that based on the sibling NiCo2O4 nanorod arrays, which are currently used in supercapacitor research due to the much higher electrical conductivity of NiCo2S4. A series of electroactive metal oxide materials, including CoxNi1-x(OH)(2), MnO2, and FeOOH, were deposited on the NiCo2S4 nanotube arrays by facile electrodeposition and their pseudocapacitive properties were explored. Remarkably, the as-formed CoxNi1-x(OH)(2)/NiCo2S4 nanotube array electrodes showed the highest discharge areal capacitance (2.86 F cm(-2) at 4 mA cm(-2)), good rate capability (still 2.41 F cm(-2) at 20 mA cm(-2)), and excellent cycling stability (similar to 4% loss after the repetitive 2000 cycles at a charge discharge current density of 10 mA cm(-2)).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available