Journal
JOURNAL OF POWER SOURCES
Volume 329, Issue -, Pages 104-114Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.08.047
Keywords
Flexible electrodes; Hybrid membrane; Phase separation; Supercapacitors
Funding
- National Natural Science Foundation of China [51203071, 51363014, 51362018]
- China Postdoctoral Science Foundation [2014M552509, 2015T81064]
- Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology [J201402]
- University Scientific Research Project of Gansu Province [2014B-025]
- Natural Science Funds of the Gansu Province [2015GS05123]
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In this article, a facile method based on in-situ phase-separation was developed for the fabrication of ultrathin hybrid membranes for highly flexible supercapacitors. The structures and morphologies of the prepared electrodes were characterized by scanning electron microscopy (SEM), Fourier-transformed infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) measurements; and the electro-chemical behaviors were examined in 2 M KOH solution. SEM and FTIR characterizations reveal that activated carbon was imbedded into the polymer membrane of polyethersulfone to form a uniform and flexible hybrid membrane. When the thin polymer-carbon membrane (PCM) was used as an electrode material for supercapacitor, a high specific capacitance of 169.4 Fg(-1) was obtained at a current density of 0.5 Ag-1 along with good long-term cycle life of 94.6% capacity retention after 2000 charging discharging cycles. Benefiting from these merits, the as-fabricated PCM//PCM cell shows an excellent electrochemical property. These results suggest a promising route towards the fabrication of highly flexible electrodes for high-performance supercapacitors. (C) 2016 Elsevier B.V. All rights reserved.
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