Journal
ELECTROCHIMICA ACTA
Volume 296, Issue -, Pages 181-189Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.11.054
Keywords
NiFe2O4; Nanosheets; Hydrothermal method; Supercapacitor
Categories
Funding
- National Natural Science Foundation of China [51272132]
- Science and Technology Development Project of Shandong Province [2016GGX102003, 2017GGX20105]
- Natural Science Foundation of Shandong Province [ZR2017BEM032]
- China Postdoctoral Science Foundation [2018M632673]
- Fundamental Research Funds of Shandong University [2015TB016, 2016JC009]
Ask authors/readers for more resources
NiFe2O4 (NFO) with different morphologies were successfully synthesized via a facile hydrothermal method of different precipitants. Results showed that the NFO obtained using urea as precipitant (NFO-U) formed a nanosheet shape, while the powders prepared using CH3COONa (NFO-C) exhibited a nanoparticle structure. Both of the two NFO showed a good crystallinity. Conclusion was reached through the results of BET and electrochemical tests that layer structure would improve the properties through a larger specific surface area. Encouragingly, the specific capacitance of NFO-U could arrive 240.9 F/g at the current density of 1 A/g. It was worth noting that the cycle performance of NFO-U was excellent, of which the specific capacitance improved to 128% after 2000 cycles. In addition, an asymmetric supercapacitor (ASC) system was constructed utilizing NFO-U as positive electrode while activated carbon (AC) as negative electrode. The two-electrode system showed a good performance with energy density of 10.15 Wh/kg at a power density of 140 W/kg. Therefore, the construction of sheet-like structures greatly improved the electrochemical performance of NiFe2O4 materials. (C) 2018 Elsevier Ltd. All rights reserved.
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