منابع مشابه
Redox-active electrolytes as a new route to obtain high-energy carbon-based supercapacitors
Supercapacitors (SCs) have attracted much interest as energy storage systems due to their high power density, long cycle life, short charging time, low maintenance, and good safety record (1). These factors make them highly attractive for use in electric devices and vehicles (2). However, for such applications it is first necessary to increase the amount of energy that can be stored by the SCs ...
متن کاملEnhancing Specific Energy and Power in Asymmetric Supercapacitors - A Synergetic Strategy based on the Use of Redox Additive Electrolytes
The strategy of using redox additive electrolyte in combination with multiwall carbon nanotubes/metal oxide composites leads to a substantial improvements in the specific energy and power of asymmetric supercapacitors (ASCs). When the pure electrolyte is optimally modified with a redox additive viz., KI, ~105% increase in the specific energy is obtained with good cyclic stability over 3,000 cha...
متن کاملCarbon Redox-Polymer-Gel Hybrid Supercapacitors
Energy storage devices that provide high specific power without compromising on specific energy are highly desirable for many electric-powered applications. Here, we demonstrate that polymer organic radical gel materials support fast bulk-redox charge storage, commensurate to surface double layer ion exchange at carbon electrodes. When integrated with a carbon-based electrical double layer capa...
متن کاملDiffusional motion of redox centers in carbonate electrolytes.
Ferrocene (Fc) and N-(ferrocenylmethyl)-N,N-dimethyl-N-ethylammonium bistrifluoromethyl-sulfonimide (Fc1N112-TFSI) were dissolved in carbonate solvents and self-diffusion coefficients (D) of solutes and solvents were measured by (1)H and (19)F pulsed field gradient nuclear magnetic resonance (NMR) spectroscopy. The organic solvents were propylene carbonate (PC), ethyl methyl carbonate (EMC), an...
متن کاملFlexible asymmetric supercapacitors with high energy and high power density in aqueous electrolytes.
Supercapacitors with both high energy and high power densities are critical for many practical applications. In this paper, we discuss the design and demonstrate the fabrication of flexible asymmetric supercapacitors based on nanocomposite electrodes of MnO(2), activated carbon, carbon nanotubes and graphene. The combined unique properties of each of these components enable highly flexible and ...
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ژورنال
عنوان ژورنال: Journal of The Electrochemical Society
سال: 2015
ISSN: 0013-4651,1945-7111
DOI: 10.1149/2.0111505jes