期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 18, 期 2, 页码 465-475出版社
SPRINGER
DOI: 10.1007/s10008-013-2276-z
关键词
Supercapacitors; Gel polymer electrolyte; Conducting polymer; Ruthenium oxide; Poly-3-methyl thiophene; Impedance
资金
- DST, New Delhi [DST/TSG/PT/2009/93]
- University of Delhi [11-17]
- CSIR, New Delhi
We report the studies on a flexible quasi-solid-state configuration of the redox supercapacitors (pseudocapacitors) assembled with an ionic liquid-based proton conducting non-aqueous gel polymer electrolyte (ILGPE) and composite electrodes of conducting polymer [poly-3-methyl thiophene (pMeT)] and hydrous ruthenium dioxide (RuO2.xH(2)O). The presence of RuO2.xH(2)O in the composite electrodes has been confirmed by X-ray diffraction and thermogravimetric analysis. The ILGPE films, prepared with the solution of an ionic liquid (1-ethyl 3-methyl imidazolium trifluoromethanesulfonate) and a salt ammonium trifluoromethanesulfonate entrapped in a host polymer poly(vinylidene fluoride-co-hexafluoropropylene), have been characterized. The symmetrical pseudocapacitors have been assembled and characterized using electrochemical impedance spectroscopy, cyclic voltammetry, and charge-discharge tests. The composite electrodes with the similar to 13 wt.% hydrous RuO2 loading in pMeT film has shown a maximum specific capacitance value of similar to 118 F g(-1) (of the composite electrode material). The corresponding maximum specific energy and power density have been found to be similar to 12.8 W kg(-1) and similar to 513 W kg(-1), respectively. With further increase in the content of RuO2.xH(2)O, a slight decrease in specific capacitance value has been observed, which indicates the reduction in utilization rate of RuO2.xH(2)O. The composite electrodes show stable capacitance values up to 5,000 charge-discharge cycles.
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