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Supercapacitors are a promising high-power energy storage device due to highly reversible charge-storage process and long cyclic stability. However, the major limitation of supercapacitors lies in their energy density. Here, a high voltage carbon-based supercapacitor is built by using 2 M CH3COONa aqueous solution as electrolyte. In three-electrode system, this paper uses the potentiostatic polarization...
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